19330894 - Chevrolet Performance LSX-DR Bare Cylinder Head

LSX-CT and LSX-DR Heads

The LSX-CT (Circle Track) and LSX-DR (Drag Racing) cylinder heads feature raised-runnerdesigns for improved airflow that supports sustained high-rpm performance. Intake port configuration is similar to the competition-derived C5R head, but the ports are raised an amazing 10 mm and the intake manifold bolt pattern is spread to accommodate additional port configurations. Additional features include:

• 11 valve angle (same as C5R head)
• Accomodates up to 1.660" diameter valve springs
• Raised rocker rails
• Requires shaft-mount rockers (P/N 19201808)
• May require special valve covers to clear shaft-mount rockers
• Provisions for down-nozzle machining
• 9 intake manifold angle - requires new LSX DR or LSX CT intake manifolds
• unique LSX-CT/DR exhaust bolt pattern

LSX-DR Cylinder head

• 356-T6 aluminum racing head
• 5/8" thick deck
• LSX-DR retangle-intake port design - requires LSX-CT or LSX-DR intake manifold
• LSX-CT/DR spread-port exhaust port pattern
• Cast-in down-nozzle bosses (not machined)
• Designed for 2.280" intake and 1.620" exhaust valves (4.165" minimum bore)
• Fully CNC-ported
• Machined for 1.660" valve springs
• 11 valve angle
• Minimum 4.125" bore
• 313cc CNC'd intake ports
• 116cc CNC'd exhaust ports
• 50cc CNC'd combustion chambers
• Capable of over 900 naturally aspirated horsepower!