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MSD Iridium Spark Plug 3720

MSD Iridium Spark Plug 3720
$17.99 ea
NEWOUT OF STOCK
Model: 4017178
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
STANDARD
DELIVERY
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MSD's spark plugs are engineered to improve the efficiency of the combustion process to create the most power possible combined with increased durability. The center tip of the plug is made from iridium to promote the best spark and increase resilience. A proprietary ceramic material enhances the dielectric strength of the plug housing forcing the spark, even under extreme cylinder pressures, to jump across the plug gap to the ground electrode. This electrode is machined to expose more spark to the incoming gases to promote the most effective combustion event possible.
Features:
  • Proprietary plug design inside and out
  • Designed for use on high performance vehicles that utilize high output ignition systems
  • Machined electrode increases exposure to the flame to improve combustion
  • MSD’s proprietary ceramic formula provides the highest dielectric strength
  • Yttrium ground electrode reduces the chance of pre-ignition
  • Iridium tip improves cold starts
  • All spark plugs tested prior to packaging and shipping
  • Unique insulator design improves spark isolation
  • Lower voltage Requirements for longer coil life
About MSD Ignition

Racers never stop experimenting as they search for every way to wring out more power or handling performance to to gain an edge over the competition. The team at MSD is no different as we strive to deliver the products you  need to meet your performance goals. We continue to innovate and invent components and technology that deliver  performance and reliability with products that are easy to use and install. 

Over the course of 40-plus years, MSD Performance has been driving the development of innovative components  that helped shape the way our cars race and perform. From super speedways to road courses, land speed racing to  top fuel dragsters, and of course your traditional hot rod, MSD has provided the components to fire nearly anything in  motorsports.

MSD was the first company to develop and offer the multiple sparking, capacitive discharge ignition for engines. The line of MSD 6-Series Ignitions are the most popular aftermarket ignitions in the world due to our race-proven performance on the track and our reliability on the street!

Early on, MSD focused squarely on ignition systems with revolutionary products like the multiple sparking CD ignition, timing and rev controls, billet aluminum distributors and the Pro-Mag, an incredible breakthrough in power  and endurance. 

Today MSD is developing electronics for your entire powertrain. The Atomic EFI systems for the LS engine platform and throttle body are now complemented with a transmission controller. Our DynaForce Starters and Alternators  ensure that your engine cranks over to fire up and the Alternators keep it charged. MSD is poised to deliver components that work and communicate together to provide performance and value.

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Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Submodel Years Engine Fitment Notes
Chevrolet Camaro Base 1971 5.0L / 307 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Base 1976 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Base 1977 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Base 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Base 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Base 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Base 1988 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Berlinetta 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Berlinetta 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Berlinetta 1981 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Berlinetta 1982 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Berlinetta 1983 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Berlinetta 1984 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Berlinetta 1985 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Berlinetta 1986 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Iroc-Z 1985 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Iroc-Z 1986 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Iroc-Z 1987 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Iroc-Z 1988 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Iroc-Z 1989 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Iroc-Z 1990 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro LT Rally Sport 1976 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro LT Rally Sport 1977 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro LT Rally Sport 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro LT 1976 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro LT 1977 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro LT 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro LT 1987 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro RS Heritage Edition 1992 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro RS 1971 5.0L / 307 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro RS 1989 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro RS 1990 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro RS 1991 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro RS 1992 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Rally Sport 1976 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Rally Sport 1977 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Rally Sport 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Rally Sport 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Rally Sport 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Sport 1981 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Sport 1982 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Sport 1983 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Sport 1984 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Sport 1985 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Sport 1986 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Sport 1987 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Z28 Heritage Edition 1992 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Z28 Indianapolis 500 Pace Car 1982 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Z28 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Z28 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Z28 1981 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Z28 1982 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Z28 1983 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Z28 1984 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Z28 1985 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Z28 1987 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Z28 1991 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro Z28 1992 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro 1971 5.0L / 307 / V8
6.6L / 402 / V8
4.1L / 250 / L6
5.7L / 350 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro 1975 4.1L / 250 / L6 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro 1976 4.1L / 250 / L6
5.7L / 350 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro 1977 4.1L / 250 / L6
5.7L / 350 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro 1978 4.1L / 250 / L6
5.7L / 350 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro 1979 4.1L / 250 / L6
5.7L / 350 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro 1980 3.8L / 231 / V6
3.8L / 229 / V6
4.4L / 267 / V8
5.7L / 350 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro 1981 3.8L / 231 / V6
3.8L / 229 / V6
4.4L / 267 / V8
5.7L / 350 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro 1982 2.5L / 151 / L4
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro 1983 2.5L / 151 / L4
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Chevrolet Camaro 1984 5.0L / 305 / V8
Chevrolet Camaro 1985 5.0L / 305 / V8
Chevrolet Camaro 1986 5.0L / 305 / V8
Chevrolet Camaro 1987 5.7L / 350 / V8
5.0L / 305 / V8		 w/Cast Iron Heads
Chevrolet Camaro 1988 5.7L / 350 / V8
5.0L / 305 / V8		 w/Cast Iron Heads
Chevrolet Camaro 1989 5.7L / 350 / V8
5.0L / 305 / V8		 w/Cast Iron Heads
Chevrolet Camaro 1990 5.7L / 350 / V8
5.0L / 305 / V8		 w/Cast Iron Heads
Chevrolet Camaro 1991 5.7L / 350 / V8
5.0L / 305 / V8		 w/Cast Iron Heads
Chevrolet Camaro 1992 5.7L / 350 / V8
5.0L / 305 / V8		 w/Cast Iron Heads
Pontiac Firebird Base 1977 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Base 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Base 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Base 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Base 1981 4.4L / 267 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Base 1982 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Base 1983 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Base 1984 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Base 1985 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Base 1987 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Base 1988 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Base 1989 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Base 1990 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Base 1991 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Base 1992 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Esprit 1977 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Esprit 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Esprit 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Esprit 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Esprit 1981 4.4L / 267 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Formula 1977 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Formula 1978 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Formula 1979 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Formula 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Formula 1981 5.0L / 305 / V8
4.4L / 267 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Formula 1989 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Formula 1990 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Formula 1991 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Formula 1992 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird S/E 1982 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird S/E 1983 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird S/E 1984 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird S/E 1985 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Trans Am GTA 1989 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Trans Am GTA 1990 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Trans Am GTA 1991 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Trans Am GTA 1992 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Trans Am 1980 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Trans Am 1981 4.4L / 267 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Trans Am 1982 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Trans Am 1983 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Trans Am 1984 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Trans Am 1985 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Trans Am 1987 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Trans Am 1988 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Trans Am 1989 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Trans Am 1990 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Trans Am 1991 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird Trans Am 1992 5.0L / 305 / V8 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1970 6.6L / 400 / V8
5.7L / 350 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1971 6.6L / 400 / V8
5.7L / 350 / V8
7.5L / 455 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1972 6.6L / 400 / V8
5.7L / 350 / V8
7.5L / 455 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1973 6.6L / 400 / V8
5.7L / 350 / V8
7.5L / 455 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1974 6.6L / 400 / V8
5.7L / 350 / V8
7.5L / 455 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1975 6.6L / 400 / V8
5.7L / 350 / V8
7.5L / 455 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1976 6.6L / 400 / V8
5.7L / 350 / V8
7.5L / 455 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1977 6.6L / 400 / V8
4.9L / 301 / V8
5.7L / 350 / V8
5.0L / 305 / V8
3.8L / 231 / V6
6.6L / 403 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1978 6.6L / 400 / V8
5.7L / 350 / V8
5.0L / 305 / V8
3.8L / 231 / V6
6.6L / 403 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1979 6.6L / 400 / V8
4.9L / 301 / V8
5.7L / 350 / V8
5.0L / 305 / V8
3.8L / 231 / V6
6.6L / 403 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1980 4.9L / 301 / V8
5.0L / 305 / V8
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1981 4.9L / 301 / V8
5.0L / 305 / V8
3.8L / 231 / V6		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1982 5.0L / 305 / V8
Pontiac Firebird 1983 5.0L / 305 / V8
Pontiac Firebird 1984 5.0L / 305 / V8
Pontiac Firebird 1985 5.0L / 305 / V8
Pontiac Firebird 1987 5.7L / 350 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1988 5.7L / 350 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1989 5.7L / 350 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1990 5.7L / 350 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1991 5.7L / 350 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Firebird 1992 5.7L / 350 / V8
5.0L / 305 / V8		 Iridium Tip Spark Plug; Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap;

Specifications:

Emission Code 2
Heat Range 4
Hex Size 5/8
Length Standard
Part Type Spark Plug
Plug Style Code 6IR4Y
Product Type Spark Plug
Projected Tip Yes
Proposition 65 www.P65Warnings.ca.gov
Quantity 1
Reach 0.4375
Resistor Yes
Seat Type Tapered
Style Iridium
Thread Size 14mm
Warranty Limited 1 Year Warranty

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MSD Iridium Spark Plug 3720:
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