PRC LS7x 285cc E85 68cc CHamber, CNC Ported 400+CFM Heads with .700″ MAX Lift Package

The Precision Race Components LS7 CNC 285cc Ported Cylinder Heads feature a 6-bolt design developed for demanding high-performance LS7 combinations. This configuration pairs 2.245″ titanium intake valves with 1.610″ Inconel exhaust valves and a TSP .700″ max-lift spring package for applications utilizing high RPM, high compression, E85, or solid roller camshafts.

The larger 285cc intake runner is recommended for higher-horsepower applications with a minimum 4.125″ bore. Flow testing shows intake airflow reaching 407 CFM at .700″ lift.

KEY FEATURES

• 285cc CNC-Ported LS7 Intake Runners
• PRC 6-Bolt Cylinder Head Design with Thicker Deck Surface
• 2.245″ Titanium Intake Valves
• 1.610″ Inconel Exhaust Valves
• TSP .700″ Max-Lift Spring Kit with PAC Valve Springs
• PAC Mini 8 Titanium Retainers
• CHE Bronze Valve Guides
• Compatible with Standard GM 4-Bolt and Aftermarket LSX/RHS 6-Bolt-Style Engine Blocks
• Designed for High-RPM, High-Compression, E85, and Solid Roller Camshaft Applications
• Cast, Machined, and Completely Assembled in the USA

CYLINDER HEAD SPECIFICATIONS

• Valve Angle: 12°
• Intake Runner Volume: 285cc
• Intake Valve: 2.245″ Titanium
• Exhaust Valve: 1.610″ Inconel
• Chamber Size: 68cc
• Maximum Spring Lift: .700″
• Minimum Recommended Bore: 4.125″

FLOW DATA

BLOCK COMPATIBILITY

• Standard GM 4-Bolt LS Engine Blocks
• Aftermarket LSX 6-Bolt-Style Engine Blocks
• Aftermarket RHS 6-Bolt-Style Engine Blocks

Note: The 285cc runner is recommended for higher-horsepower applications with a minimum bore size of 4.125″. Valve spring lift ratings are based on the use of titanium intake valves.

Learn more about Precision Race Components cylinder heads.