Ultima Rear Cylinder Head Assembled Polished

Polished assembled front cylinder head includes valves, springs, collars, and compression release for 4.400" bore engines.
Assembled rear cylinder head feature compression release valves included.Intake valve at 25° angle and the exhaust valve at a 28° angle. Complete head also features high silicon valve springswith chromoly retainers, manganese bronze guides, and 14mm spark plug.