Patriot Performance GM LS Series 5.3L Stage I Head Assy Center Bolt.
STAGE I
- CNC Ported
- Stock Valves
- Stock Springs
- Stock Retainers
- 5 Angle Valve Job
- NO CORE CHARGE
Engine LR4,LM4,LM7
Valve Size Intake 2.00
Exhaust 1.55
*Super Flow 1020 Flow Bench Ratings
Chamber_cc: 66.67 | .100 |.200 | .300 |.400 | .500 | .550 | .600
Int_cc: 213 | 63 | 128 | 188 | 234 | 268 | 283 | 289
Exh_cc: 78 | 57 | 103 | 141 | 176 | 196 | 206 | 212
Patriot Performance Racing Heads are the nations leader in ported LS Gen III, Performance heads. The porting of performance heads has always been part of attaining maximum horsepower. Performance heads are enhanced by porting the chamber, bowl and runners to attain maximum air and fuel flow. Slight alterations can affect that flow tremendously. Our ported heads resemble works of art after they are machined. Our performance heads also have valve jobs that resemble the racing heads of Nascar. Their design was arrived at over time, working with designers of racing heads. Our performance heads also have our own custom manufactured racing valves and springs. Our titanium retainers are made in-house. Bronze guides – of course.
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