Chevrolet Performance 12562925 - Bare Cast-Iron Gen V and Gen VI BBC Cylinder Head

Chevrolet Performance service replacement cylinder heads are direct replacements on most 1990-and-later GM Big-Block 454-cubic-inch and 502-cubic-inch engines. These cylinder heads meet GM’s stringent quality standards and provide excellent service and durability not found in used cylinder heads. The cylinder heads have rectangular intake ports. Material Iron Port Size 325 Intake Port Type Rectangular Valve Angle BBC Chamber Size (cc) 118 Assembled or Bare Bare Intake Valve 2.180" Exhaust Valve 1.880" Exhaust Port Type Square Notes 7/16" accessory bolt holes