Description
Replaces the OEM GM 502 piston, but accepts standard 1/16, 1/16, 3/16 rings. Reliable, high performance upgrade over OEM pistons. 4032 low expansion, high-silicon aluminum alloy heat treated to SRP specifications. CNC machined domes with radiused valve reliefs provide optimum flame travel. Pin fitting and double spiro locks (#990-042-CS) included. 990-2930-15-51S wrist pins (150 grams) included. CNC Machined ring grooves accept 1/16, 1/16, 3/16 rings (Sold separately)