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

$3,499.98
Precision Race Components Aftermarket Casting 6-Bolt 285cc Fully CNC Ported LS7 Heads Assembled With Hollow-Stem Stainless Steel Intake Valves (Titanium Upgrade Available Below), TSP .660" Dual Valve Spring Kit with PAC Racing Springs & Titanium Retainers; Kit Also Includes TSP Hardened Pushrods & Your Choice Of Camshaft!

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Selected Size Sold Out! Pre-order Now - Shipping June 2018
SKU: 199-PKG17
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  • Precision Race Components Aftermarket Casting 6-Bolt 285cc Fully CNC Ported LS7 Heads Assembled With Hollow-Stem Stainless Steel Intake Valves (Titanium Upgrade Available Below), TSP .660" Dual Valve Spring Kit with PAC Racing Springs & Titanium Retainers; 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. The cylinder heads come standard with a hollow-stem stainless steel intake valve, which is heavier than the titanium valve option. The following lift numbers are the recommended maximum valve lift that can be safely run with each valve choice: Hollow-Stem - .625"; Titanium - .660". Again, keep in mind that these are the total valve lift numbers (cam lobe lift x rocker arm ratio). These numbers also assume that you're running the TSP .660" dual spring kit. ​ 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!**

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