Chevy Gm LS1 LS6 12V High Output E-Poxy Ignition Coil Red [Square D585] 8pcs and regulator

and regulator

that have a 4bolt pattern

They're designed with performance in mind

These Speedmaster Fuel Rails feature a larger internal diameter that dampens the pulses and provides increased fuel volume

look no further than Speedmaster

Chevy Gm LS1 LS6 12V High Output E-Poxy Ignition Coil Red [Square D585] 8pcs and regulatorFailure or poor performance from a coil can result in a misfire, a rough running, hard starting engine, and excessive emissions. Speedmaster's ignition coils provide the performance needed to help keep vehicles running the way that they were designed. These coils have corrosion protected laminations to protect coils from the harsh operating environment