HP Copper Spark Plug - Shorty - 0414S-4 gauges-clusters-and-clocks Provision for installing Holley P/N

Provision for installing Holley P/N 20-113

CID 283 CID

OEM - 25752677

4 V8 2009 - 2018 Dodge Challenger 345/5

1967-1967 Pontiac Firebird 326 CID

HP Copper Spark Plug - Shorty - 0414S-4 gauges-clusters-and-clocks Provision for installing Holley P/NOverview: 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