Name: Precision Race Components CNC Ported 6-Bolt 285cc Aftermarket Casting LS7 Heads & Cam Package
Brand: Precision Race Components
SKU: PRC-PKG285

Precision Race Components Aftermarket Casting 6-Bolt 285cc Fully CNC Ported LS7 Heads Assembled in the USA; Kit Also Includes TSP Hardened Pushrods & Your Choice Of Camshaft!

When selecting your camshaft, please keep in mind that the LS7 rocker arm ratio is 1.8:1 and NOT 1.7:1 like all of the other LS-based engines! All of our LS7 camshafts are listed with the 1.8:1 rocker ratio.

All of the optional Cloyes timing sets are built for a three-bolt cam core and are specific to the LS7/LS9 dry-sump oiling system. If you select a Cloyes timing set, be sure that you also select a three-bolt cam core!

**You must have a minimum of a 4.125" bore size to run these cylinder heads!**

2.245" Titanium Intake Valve / 1.610" Stainless 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 Intake	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