Big Valve Cylinder Heads - Ported and polished, (pr)

Here's another long subject, but it'll give you a little something to think about. 75% of your horsepower comes out of the heads. Why would you build a big engine and not increase the size of the valves? Only so much fuel and exhaust can go through a certain size hole. So if you are putting on larger pistons and cylinders, you're wasting your time, unless you do something about the heads. Remember, a good engine is a combination of parts that work well together. These heads come with 40mm intakes and 35.5 exhaust valves. This is the best valve sizes for a reliable street engine. For more information, please call when you have some extra time. We could write a book on this subject alone.

Bug (Type 1): 1600
Bus (Type 2): 1600
Type 3: 1600
Ghia: 1600
Thing: 1600
Race/Off-Road: 1600