12499255
Bowtie 572/620 Cylinder Head Assembly

• Aluminum head assembly
• Used in the 572/620 Chevrolet Performance crate engine
• Completely assembled with 2.250"/1.880" 11/32" stem valves
• Valve springs for hydraulic roller cams for up to .632" lift
• 310cc rectangular intake port
• 118cc exhaust port – raised 5/8"
• 118cc combustion chamber
• Not recommended for engines smaller than 572 cid

This head is assembled with the following components:
12366987 2.250" Intake Valves
12366990 Valve Spring Retainer Lock
88963128 1.880" Exhaust Valves
12366992 Valve Spring Retainer
88963934 Valve Springs
88963936 Valve Seals
88963937 Valve Spring Shims
3921912 Rocker Arm Studs
88963935 Valve Spring Locators
3860038 Pushrod Guideplates