- Hollow dome design fits most open chamber STD 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 included
- 990-2930-150 wall wrist pin (150 grams) included
- CNC Machined ring grooves accept 1/16, 1/16, 3/16 rings (Rings Sold Seperately)
- 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