Notes: For high performance engines only. All, including Stage I and II engines. Steel core laminate. Pre flattened steel wire combustion seal. 4.020" bore. 0.039" thickness. Volume: 8.2cc. Minimal brinelling of aluminum head.
Notes: For high performance engines only. All, including Stage I and II engines. Steel core laminate. Pre flattened steel wire combustion seal. 4.090" bore. 0.039" thickness. Volume: 8.5cc. Minimal brinelling of aluminum head.