Description
Hollow dome design fits most open chamber GM, Dart, and Brodix Heads. Forged from Premium 2618 aluminum alloy. 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 pin (150 grams) included. Fits tall deck, when used with .400 long rods. Will not fit GM Signature Series or Edelbrock Cylinder Heads: P/N# 60549, 60559, 61559, 60449, 60459, 61459, 60479, 60499. CNC Machined ring grooves accept 1/16, 1/16, 3/16 rings (Sold Separately)