catylitic converter quetions
#1
Three Wheelin'
Thread Starter
catylitic converter quetions
I have a 3" complete fabspeed exhaust for my 951. Before I put it in, I want to install the highest flowing cat that I can find. Does anyone know of any good companies to look for? Would a 4" one be better than 3" (in diameter)? Normally I would say 4" would have less restriction but people are saying that 4" complete exhausts are worse for performance....