Set of LSX drag racing heads. This is the cylinder head that Chevrolet Performance engineers designed for the 770hp LSX454R engine. These LSX-DR (Drag Racing) 11-degree, six-bolt aluminum heads feature raised-runner designs 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 10mm and the intake manifold bolt pattern is spread to accommodate additional port configurations.
Specifications:
Fully CNC ported
356-T6 aluminum racing head
Valve guides and seats installed
5/8'' thick deck
LSX-DR rectangle intake port design - requires LSX-DR intake manifold (p/n 809-19257851)
LSX-CT/DR spread port exhaust port pattern
Cast-in down-nozzle bosses (not machined)
Designed for up to 2.280'' intake and 1.620'' exhaust valves (4.165'' minimum bore)
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
Provisions for down-nozzle machining
9° intake manifold angle - requires new LSX-DR intake manifolds
Unique LSX-DR exhaust bolt pattern
Raised rocker rails
Requires p/n 809-19201808 shaft-mount rocker kit
Capable of over 900 naturally aspirated horsepower!
Installed on LSX454R engine assembly
