TSP PRC As-Cast 257cc CNC Ported LS3 Style 6-Bolt Cylinder Heads PAIR w/ TSP .660" Spring Kit and Titanium Retainers
Precision Race Components (PRC) all new LS3 as-cast cylinder heads completed with CNC machined chambers & valve guides. For LS3/L99/L92/LSA/LS9 applications requiring a high flow aftermarket cylinder head at a competitive price!
The all new PRC LS3 As-Cast cylinder heads are now available for customers looking for the ultimate as-cast LS3 cylinder heads available. The new PRC as-cast intake port has been flow bench tested to flow 369 CFM & can support everything from smaller camshaft street engines all the way to all out race engines.
MADE IN THE USA!!
CAST IN THE USA!!
MACHINED IN THE USA!!
Features:
-
As-Cast 257cc Intake Runners With CNC Machined Chambers & Valve Guides For Unmatched Flow!
- 68cc CNC Machined Chambers
- Thicker Deck Surface Makes Them Ideal For Power-Adder Applications
- 3/4" Deck Thickness
- Will accept up to 1/2" Cylinder Head Hardware
- Relocated valves with 13° Valve Angles
- 2.170" Hollow Stem Stainless Intake Valves / 1.600" Stainless Exhaust Valves
- Utilizes Factory Rocker Arms
-
TSP .660 Spring Kit w/ PAC Valve Springs & Titanium Retainers
- Minimum Bore Dia: 4.000"
| As-Cast 257cc CNC Ported LS3 Flow Data (4.00" Flow Plate - No Exhaust Pipe): |
| Lift |
Intake Flow
|
Exhaust Flow
|
| .200" |
153 cfm
|
114 cfm
|
| .300" |
233 cfm
|
163 cfm
|
| .400" |
287 cfm
|
191 cfm |
| .500" |
329 cfm |
214 cfm |
| .600" |
357 cfm |
228 cfm |
| .650" |
369 cfm |
233 cfm |
