HP Copper Spark Plug - Shorty - 0576S-4 tailpipe 4L GM V6 engines with

4L GM V6 engines with both round port or D-port style exhaust ports

1986-1987 Oldsmobile Cutlass Salon 231 CID

4L V8 1976 - 1979 Chevrolet P20   454/7

ABS and Non-ABS Models

OVERSIZED BORE compared to other LS throttle bodies

HP Copper Spark Plug - Shorty - 0576S-4 tailpipe 4L GM V6 engines withOverview: 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