4P Outlaw V2 GSR CNC Head R40 90mm Bore is 15:1

90mm Bore is 15:1

higher compression

30mm Exhaust)

The top of the valve will still utilize your existing 5

They are durable and can be cleaned and reused over and over

4P Outlaw V2 GSR CNC Head R40 90mm Bore is 15:1Outlaw V2 More CFM, More Horsepower 4P CNC heads make significantly more power, AND last up to 3 times longer than the competition. That is what our cylinder head program is all about pumping out the biggest horsepower, keeping it responsive, and doing so with increased longevity. With a high power turbo car, your biggest battle is dealing with extreme exhaust temperatures. Our heads have design features that pull heat away from the valve and improve