Accels patented race proven spark plugs are now available in a shorty configuration.The overall length of each plug has been reduced 1/4 in to 3/8 in (depending on the specific spark plug) to gain critical air gap space between the spark plug boot and the exhaust manifold or header tube. This helps eliminate burning the spark plug boot or dimpling the header tube.The shorter spark plug length also can make it easier to install and remove the spark plugs in certain applications where there is not a lot of room to work with a socket or wrench.{specs}Camaro applications:1986 305 5.0L-FH1987-95 305 5.0L-HF TBI1987-96 350 5.7L-KR TBI EFI1990-98 427 7.0L-BEM TBI1971 454 7.4L1987-97 454 7
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Accel; Shorty Spark Plug Set Of 8; 14mm Thread; .460" Reach; Tapered Seat; 2 Pack Of 0574S-4

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Accels patented race proven spark plugs are now available in a shorty configuration.The overall length of each plug has been reduced 1/4 in to 3/8 in (depending on the specific spark plug) to gain critical air gap space between the spark plug boot and the exhaust manifold or header tube. This helps eliminate burning the spark plug boot or dimpling the header tube.The shorter spark plug length also can make it easier to install and remove the spark plugs in certain applications where there is not a lot of room to work with a socket or wrench.{specs}Camaro applications:1986 305 5.0L-FH1987-95 305 5.0L-HF TBI1987-96 350 5.7L-KR TBI EFI1990-98 427 7.0L-BEM TBI1971 454 7.4L1987-97 454 7.4L-N TBI EFIFirebird applications:1985 305 TPI (F)1986 305 (G)1986-87 305 TPI (F)1 986-87 350 iron heads (8)Chevrolet / GMC Truck applications:1986 305 5.0L-FH1987-95 305 5.0L-HF TBI1987-96 350 5.7L-KR TBI EFI1990-98 427 7.0L-BEM TBI1971 454 7.4L 1987-97 454 7.4L-N TBI EFIImpala / Full Size applications:1971 454 7.5L 365HPNova applications:1971 454 7.5L 365HP