cat back vs muffler swap - Ford Mustang Forum
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post #1 of 3 (permalink) Old 07-26-2019 Thread Starter
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Joined: Feb 2015
Location: Bloomington
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cat back vs muffler swap

I am wondering if the .25 inch pipe difference and mandrel bending over the axle is really worth the cost difference to just replace the stock mufflers with something a little more free flowing.

My current set up is factory manifold and cat back with O/R H pipe. I am happy with the sound, and always felt the mid pipe was the greatest restriction.
I have been contemplating adding long tubes and doing a small cam swap, and have been doing a little research on exhaust flow, and am starting to wonder how restrictive the stock mufflers really are. Ford claims the difference between the stock GT and 01 Bullitt exhaust system flowed like 10-15% better, and from what I can tell the only real difference was the mufflers (still same 2.25" pipe).
I just would hate to drop over a grand in cams, headers, dyno tune, etc. only to have the factory mufflers and(or) cat back actually choke things up.
Just wanted to get some opinions from anybody with experience in the area.

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post #2 of 3 (permalink) Old 08-04-2019
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Posts: 5,580
Muffler/cat-back, same sht. Both make sound, neither make much if any power at all.

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post #3 of 3 (permalink) Old 08-05-2019
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Location: E. TN
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If the previous owner of my GT hadn't backed one of the tailpipes into something, I'd still be on the factory mufflers and pipes.

Underestimate me, that will be fun.

These are my opinions...YOU are responsible for YOUR decisions and YOUR outcomes...AND, my not arguing with you does not indicate agreement with your opinion.
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