CP Bullet Pistons for the LS are made on premium 2618-t6 forgings and are balanced to a tolerance of +/- 1 gram. They feature forced pin oilers, contact reduction grooves, accumulator grooves, as well as forged side reliefs. 5100 steel wrist pins, with wire locks are standard. Each set includes a 1.5 1.5 3.0 ring set, which consists of a steel gas nitrided barrel face top ring, a taper hook groove napier second ring. and a 3 piece soft nitrided oil ring that is designed for severe duty applications.
Flat top pistons in a Chevrolet LS Series engine will generally provide compression ratios in the 10.0 to 11.0:1 range which makes them a good option for engines with aluminum heads and larger than stock camshafts. Valve reliefs are configured to work with all standard aluminum cylinder heads and will normally fit camshafts to well over .600 valve lift. LS Series valve reliefs have 15 degree angles to accommodate all available cylinder heads.
Dish top pistons in a Chevrolet LS Series engine will generally provide compression ratios in the 9.0 to 10.5:1 range which makes them a good option for engines with aluminum heads and larger than stock camshafts. Valve reliefs are configured to work with all standard aluminum cylinder heads and will normally fit camshafts to well over .600 valve lift. LS Series valve reliefs have either 12 or 15 degree angles to accommodate all available cylinder heads.
Flat top pistons in a Chevrolet LS Series engine will generally provide compression ratios in the 13.0:1 range which makes them a good option for race engines with aluminum heads and larger than stock camshafts. Valve reliefs are configured to work with all standard aluminum cylinder heads and will normally fit camshafts to well over .600 valve lift. LS Series valve reliefs have 15 degree angles to accommodate all available LS Series cylinder heads. They will not fit the LS7 12 degree heads.
