Originally Posted by smittyschevy
Smitthys all day, 2" pipe, engine needs backpressure to run best. My 2 cents, Smitty

I'm a little surprised about your comment on backpressure making the engine run better. I'd always thought that negative backpressure would give best performance, another reason why I use crossover pipes.

Can you explain, please?


195? Chevy 3800 dump truck
1973 Chevy C30 cab and chassis
1987 Suburban 3/4 ton 6.2L Diesel