Patriot Performance CNC Ported 243 LS6 / LS2 2.02"/1.57" 59cc Heads Bare

Our custom 5 axis CNC machined new 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 stock OEM versions. The 59cc chambers (achieved by milling), 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. The Stage II bare heads feature our 5 angle 2.02"/1.57" valve job, hand blending, and custom honed bronze guides.

*Sold as Pair

Part Number:  198-2028

Technical Specs:

Combustion Chamber: 59cc
Intake Runner: 227cc
Exhaust Runner: 70cc
Intake Valve: 2.02"
Exhaust Valve: 1.57"
Valve Guide Material: Manganese Bronze
Valve Job: 5-angle