- Designed to fit Edelbrock STD Series Heads.
- 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 included
- 990-2930-150 wall wrist pin (150 grams) included
- CNC Machined ring grooves accept 1/16, 1/16, 3/16 rings, closed chamber accepts 5/64, 5/64, 3/16 rings