PRC LS7x 285cc CNC Ported 400+CFM Heads
PRECISION RACE COMPONENTS
Precision Race Components LS7 CNC 285cc ported cylinder heads. All new 6-bolt Precision Race Components LS7 cylinder heads!
MADE in the USA!! CAST in the USA!! MACHINED in the USA!!
Click Here to SEE why we build better heads!
Extensive CNC and dyno testing has resulted in one of the most affordable and powerful LS7-based cylinder heads available! Flowing up to 53 CFM more than the stock GM LS7 head, the all-new PRC cylinder heads offer both unmatched power and airflow! The 285cc runner is recommended for higher HP applications with a minimum bore size of 4.125".
- 2.245" Titanium Intake Valve / 1.610" Stainless Hollow Stem Exhaust Valve
- TSP .660 Spring Kit w/ PAC Valve Springs & Titanium Retainers
- 6-Bolt Cylinder Heads with Thicker Deck Surface
- CHE Bronze Guides
- Will Work on Both Standard GM 4-Bolt & Aftermarket LSx / RHS 6-Bolt Style Engine Blocks
- Completely Assembled in the USA
Extensive CNC and dyno testing has resulted in one of the most affordable and powerful LS7-based cylinder heads available! Flowing up to 53 CFM more than the stock GM LS7 head, the all-new PRC cylinder heads offer both unmatched power and airflow! The 285cc runner is recommended for higher HP applications with a minimum bore size of 4.125".
Cylinder Head Specs:
Valve Angle: 12 Degree
Intake CC: 285cc
Intake Valve: 2.245"
Exhaust Valve:1.610"
Chamber Size: 70cc
**Valve spring lift ratings are based on using titanium intake valves.
| LS7 | LS7 Exhaust | PRC 285cc LS7 Intake | PRC LS7 Exhaust | |
| .200 | 161 | 114 | 169 | 119 |
| .300 | 227 | 171 | 248 | 179 |
| .400 | 291 | 193 | 311 | 211 |
| .500 | 330 | 203 | 353 | 224 |
| .600 | 351 | 209 | 386 | 235 |
| .650 | 353 | 204 | 393 | 241 |
| .700 | 353 | 209 | 407 | 246 |
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