STRATEGY In keeping with our goal of providing our customers with the best possible value, we have tested a large group of components specifically designed for the PONTIAC GTO. We have invested many hours evaluating and refining each of the GTO products on our chassis “dyno”, to ensure that we could develop as much power as possible, as safely as possible. The site menu on the left side of this page, lists the clear winners when it comes to “performance vs. dollar” value. Please check back often as we are always developing new ways to create more horsepower.

Patriot Performance CNC Ported Stage II/III Heads
For ALL LS1 / LS6 / LS2 Series Engines

When we decided to sell Aftermarket Performance cylinder head the decision was easy! When performance counts, Patriot Performance Stage II/III CNC-ported cylinder heads for the LS1 / LS6 / LS2 series engines. Patriot Performance LS1 / LS6 / LS2 Series heads come fully assembled and can handle blown or nitrous applications. These LS1 / LS6 / LS2 Series Engines heads feature several combustion chamber choices; 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 80 cfm improvement over stock OEM versions. Your choice of combustion chambers will increase the compression on a stock LS1 from 10-1 to 10.5-1. Based on other modifications, gains of up to 80 rwhp can be expected. These are a great choice for any naturally aspirated engines and applications where nitrous, supercharger and blower systems are used. The Stage II/III heads feature stainless steel valves, Patriot Gold Dual .650” Lift springs, titanium retainers, Super 7 machined locks, custom honed bronze guides, machined spring bases, and viton rubber seals. *Sold as Pair Technical Spec. Features: NEW GM Castings Custom 5 axis CNC ported Custom 5 Angle Valve Job Stainless Steel, undercut intake valves Stainless Steel, undercut exhaust valves Custom honed bronze guides Dual .650” Lift springs Titanium Retainers Super 7 machined locks No Exchange Required *Sold as Pair

Patriot Performance NEW GM LS6/LS2 Castings Technical Specs: Combustion Chamber: 64cc Intake Runner: 227cc Exhaust Runner: 70cc Intake Valve: 2.02-or-208" Exhaust Valve: 1.57-or-160" Max. Valve Spring Lift: 0.650" Spring Pressure Closed: 135 lbs. @ 1.800" Spring Pressure Open: 375 lbs. @ 1.090" Retainer Material: Titanium Valve Seal Material: Viton Valve Guide Material: Manganese Bronze Valve Job: 5-angle

Application Part#/Price Patriot Performance NEW GM LS6/LS2 Castings Fully Assembled 64cc Stage II Heads 650" Lift Springs, Titanium Retainers, Super 7 locks 21-4N Stainless Steel High-Flo 2.02"/1.57" valves 5 Axis CNC Ported, Polished Heads PAT2013 $ 1249.99 Patriot Performance NEW GM LS6/LS2 Castings Fully Assembled 59cc Stage II Heads 650" Lift Springs, Titanium Retainers, Super 7 locks 21-4N Stainless Steel High-Flo 2.02"/1.57" valves 5 Axis CNC Ported, Polished Heads PAT2029 $ 1249.99 Patriot Performance NEW GM LS6/LS2 Castings Fully Assembled 64cc Stage III Heads 650" Lift Springs, Titanium Retainers, Super 7 locks 21-4N Stainless Steel High-Flo 2.02"/1.57" valves 5 Axis CNC Ported, Polished Heads PAT2015 $ 1249.99

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