Our custom 5 axis CNC machined GM castings make these heads a must have for any performance oriented GM LS series engine. These heads provide up to a 65 cfm improvement over the stock OEM versions. The 64cc chambers will increase the compression on a stock LS1 from 10-1 to 10.5-1. The 59cc chambers will increase the compression on a stock LS1 from 10-1 to 11-1. Based on other modifications, gains of up to 40 rwhp can be expected. These are a great choice for naturally aspirated engines and applications where 75-150hp nitrous systems will be used.
Patriot Performance Stage Heads for 1998-2013 Corvette LS1/LS6/LS2 Engines