Edelbrock 60439: 60439 Performer RPM High Compression 454 O-Port Cylinder Heads for Big Block Chevy
Performer RPM High Compression Aluminum Cylinder Heads - Oval Port
Big Block Chevy 396-502ci Valve Springs for Hydraulic Flat Tappet Port Volume: 290cc/110cc Valve Size: 2.19"/1.88" 100cc Combustion Chambers Assembled Sold Individually