CP-Carrillo Automotive Piston, Each, Cyl: 1, Material ID: 235 0DETU Fog Lights Bolt directly to factory mounting

Bolt directly to factory mounting points without modification

Combination switch assembly with integrated turn signal

or do I need to prep the housings first

A drop of 10–15% from the highest to lowest cylinder typically indicates internal wear — check your engine's service manual for acceptable variance limits

CP-Carrillo Automotive Piston, Each, Cyl: 1, Material ID: 235 0DETU Fog Lights Bolt directly to factory mountingSmall Block Chevy LS1 Piston SBC LS1 Flat Top & Dish Designed on X style forging to clear reluctor wheel Fit LS1, LS2 and LS6 heads Designed for shorter wrist pins Pinfitting included at no cost Chamfered pins and wire locks included Accumulator and anti detonation grooves included Designed for back cut rings Double pin oilers, force fed from oil ring Pick lock grooves for easy lock removal Custom skirt cam and barrel shapes Supplied with Wire Locks