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Precision Race Components CNC Ported 6-Bolt 285cc Aftermarket Casting LS7 Heads & Cam Package

PRC CNC Ported 6-Bolt 285cc Aftermarket Casting LS7 Heads & Cam Package

From Original price was: $4,432.99.Current price is: $4,344.33.

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…

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SKU: PRC-PKG285 Categories: , Brand:

Description

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

    This assembly is built to order. Choose your crankshaft, connecting rods and pistons above — the price updates as you select.

    Additional information

    Weight 288 oz

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