Thread: Low Backpressure Side Affects?

Tweet

I have heard that running 'open' headers can burn exhaust valves, but personally I feel you have to have another problem going on. IE, bad grind, ( valve edge too thin ), or engine running way lean.

Originally Posted by firebird77clone

I have heard that running 'open' headers can burn exhaust valves, but personally I feel you have to have another problem going on. IE, bad grind, ( valve edge too thin ), or engine running way lean.

I believe that the thinking on this is that after you shut the motor off, cold air has an easy entry into the open pipe and can warp a hot exhaust valve.