Precision Race Components all new cylinder head castings completed with 220cc runners. For stock cubic inch 4.8/5.3/LS1/LS2 applications requiring a stock valve angle LS cylinder head with extra thick decks comparable to stock piston to valve.
MADE IN THE USA!! CAST IN THE USA!! MACHINED IN THE USA!!
Features:
- 220cc Intake Runners
- 84cc Exhaust Runners
- Designed as a bolt on cylinder head with minimal change to pushrod length
- TSP Spring Kit w/ PAC Valve Springs Rated To .660" Lift
- 64cc CNC Machined Chambers
- CHE Bronze Guides
- 2.045" Intake / 1.600" Stainless Valves
- Factory Rocker Friendly!!*
- Extra Thick Deck Surfaces For Power Adders
The all new 220cc cylinder head is finally available for customers looking for a bolt on 15 degree LS cathedral cylinder head. Think of this cylinder head as the ultimate 15 degree LS1/LS2 cylinder heads for guys wanting a stronger replacement to the LS1 / LS6 / LS2 factory casting. The perfect head for guys wanting a aftermarket casting that will retain the use of all there existing components.
Flow Data:
4.00" Flow Plate - No Exhaust Pipe
| LIFT | INTAKE FLOW | EXHAUST FLOW |
| .100" | 67 CFM | 55 CFM |
| .200" | 145 CFM | 113 CFM |
| .300" | 207 CFM | 166 CFM |
| .400" | 252 CFM | 200 CFM |
| .500" | 292 CFM | 215 CFM |
| .600" | 304 CFM | 226 CFM |
| .650" | 311 CFM | 228 CFM |
Stock rocker arms will cause increased guide wear in applications over .600" lift. Roller rockers can help to reduce this wear.
