jmart69x

What are the pros and cons of each? I have a 2006 GT 5-speed. All stock, except recently installed MAC mufflers. I am considering upgrading the rest of the exhaust. I am thinking of long-tube headers with hi-flo cats. Question is, do I go with X-pipes or H-pipes? What about the MAC pro-chamber pipes I have been hearing so much about? I want to maintain a low growl. Don't want cabin drone. Don't need to be obnoxiously loud. One suggestion is to go with Kooks long-tubes and Catted x-pipes to go with my MAC mufflers. Has anyone heard this setup? How loud is it? Any drone?

JGT

Check out this thread for a sound clip, look for flewbyu's post, he's got the Kooks LTs with Macs, and I don't think he has much drone with it.

https://mustangforums.com/m_2189227/tm.htm

H-Pipe and Prochamber will both be deeper than the X. I've got the Prochamber and love it. Adds a deeper more grumbly tone than just the axle-backs alone.