RHS™ offers technical assistance with any of our products simply by filling out our online cylinder head technical assistance form, or by calling us at 877-776-4323 M-F from 8am to 5pm CST. We also offer tech assistance in the form of an extensive archive of informative magazine articles, and our latest offering –The RACING HEAD HELP™ RACER’S FAQ. Got a question or answer that you think should appear in the FAQ? Email us, and we’ll see about getting it posted.

Which cylinder head material is the best one to use: cast iron or aluminum?

Which intake runner volume should I choose?

What’s the point of all of the different combustion chamber sizes on RHS™ heads and which size is correct for my engine?

I’ve picked out a set of heads, any ideas on an intake manifold?

I need pushrods. Why doesn’t RHS™ list the right size pushrods for my engine based on the cylinder head choice that I’ve made?

What valve springs should I run?

What kind of camshaft should I run with my new cylinder heads?

What’s all this talk about piston to valve clearance? Can’t you tell me if I have enough or not based on my engine data? And while we’re at it, where do rocker arm ratios figure into all of this stuff?

My buddy has a set of camel hump heads. He says that they were professionally rebuilt and that he’ll sell them to me for $500. Does this sound like a good deal? I’m building a small block Chevy hot street/strip car and plan on doing more than a little bit of drag racing.