Exhaust Help

[Doobiesuy]

Hi I have a 2003 mustang gt and was wondering if a catted h pipe will be a lot louder of stock if anyone has a vid of a catted h pipe with flow 44s please send me it I would like to hear it

 

[Dark04GT]

Stock is two sets of cats (4 total). A single set of cats with an aftermarket H, especially with a catback, will be probably be louder. The catback is going to be the biggest difference in loudness going from stock.

 

[Doobiesuy]

ok thanks but I'm thinking about just getting flowmaster 44s mufflers not the catback will the mufflers and h pipe be pretty loud?

 

[Dark04GT]

Flowmaster 44's are plenty loud for most people. I originally had flowmasters welded in to the stock pipes. Saved about $100 total after labor costs (at that time) vs a catback. I have since switched to a catback because the stainless steel, larger exhaust pipe diameter, and sound (no more drone) were important to me. If I were to do it over again I would have skipped the weld-ins and just got the catback for the sound I wanted first (I am partial to borla):
View: https://www.youtube.com/watch?v=KpyVBV5R9tw


I'd get something here (easy to install):
http://www.americanmuscle.com/9904-mustang-catback-exhaust.html#shop-by1

If I were you I would hold off on the h pipe if there are any plans for long tube headers.