Originally Posted by Dtibbz22
Recently ran true duals with cats ( went to a muffler shop instead of my mechanic that's why cats are on) Anyway I'm getting them taken off and thinking about an x pipe. What's a better option here in terms of over kill to the muffler (flowmaster 40 series are on now) also will I need heat shields where the cats used to be
True duals are or should be a thing of the past.
An H or X-Pipe works better and sounds better too IMO.
Their purpose is to smooth out the exhaust pulses which promotes a better flowing exhaust system.
You won't need heat shields where you remove the cats unless the exhaust runs really close to something that needs shielding. The cats build a lot more heat than a straight piece of pipe.