CP-Carrillo Automotive Piston, Set Of 8, Cyl: 8, Material ID: 1038 06RG3 BLOX Racing You can replace one side

You can replace one side if only that sensor has failed

What comes in the box — do I need to source fasteners separately

Do I need to tune my engine after installing these headers

MAP adapters

CP-Carrillo Automotive Piston, Set Of 8, Cyl: 8, Material ID: 1038 06RG3 BLOX Racing You can replace one sideSmall Block Chevy LS1 Piston Kit 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