HP Copper Spark Plug - Shorty - 0574S-4 LowMargin 5 V8 1978 - 1980

5 V8 1978 - 1980 Pontiac Grand Am 301/4

5L V8 1968 - 1969 GMC K25/K2500 Pickup 396/6

4 V8 1996 - 2000 GMC Savana 3500 454/7

Brand Holley EFI Emission Code 3 Ignition Type Coil - (No Timing Control) Ignition Type Ford TFI Ignition Type GM HEI Small Cap Ignition Type Holley Dual Sync Distributor Injector Connector Jetronic / Minitimer (Bosch) Product Type HP EFI Kit

HP Copper Spark Plug - Shorty - 0574S-4 LowMargin 5 V8 1978 - 1980Overview: ACCEL's patented race proven spark plugs in a Shorty configuration. The overall length has been reduced 3 16 in to 3 8 in (depending on the specific spark plug) to gain critical air gap 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 an remove the spark plugs in certain