Has anyone tried changing Just the muffler?

NJSierra · 12-15-2007, 09:06 AM

I was wondering if anyone tried changing just the muffler to keep the factory exhaust look the same. Would changing the muffler to a Flowmaster, heartthrob, magnaflow, dynomax, etc. do anything else for sound and performance while still having the factory resonators attached before exhaust tips. Just trying to go a little cheaper than adding the Corsa Sport Cat back system which looks and sounds great. Anyone with any information on this I would greatly appreciate it. Thanks.

VernLaw · 12-15-2007, 02:56 PM

My local muffler shops say that your typical chambered mufflers (i.e. Flowmasters) will not fit, and that I would need to go with a round muffler of some kind.

I really like the sound of chambered mufflers on my Mustangs, so I was hoping to get some kind of similar setup on the GTO as well. Any help, anyone?

anmracing · 12-15-2007, 03:25 PM

You may also want to do a search. There are a lot of threads with this type of info....

coolhandgoat · 12-16-2007, 08:45 AM

My '05 that I bought used had some single chamber flowmasters on it. They were really loud and sounded great, but the drone on the highway was too much for me since I was driving cross country... so I bought a set of stockers and threw them back on. Took maybe 10 minutes to swap out on a lift. So it can be done.

NJSierra · 12-16-2007, 10:16 AM

Yes, I was afraid of the drone with the flowmasters, I guess I might have to bite the bullet and by that corsa sport exhaust cat bak system. Thanks. I did hear that hearthrob had a nice chambered muffler that had welded fins that stops the drone.

t0ny · 12-17-2007, 02:52 AM

Ck out this thread:

hey guys

NJSierra · 12-17-2007, 10:14 PM

Flowmaster does make a two inlet in and two inlet out 2.5 muffler. The garage around the corner from where i live is a five star custom muffler service and told me he could custom the exhaust for me if I wanted him too with the above mentioned muffler which comes in the orignal 40 series. After I told him what i was looking to do with corsa and magnaflow he told me to just bring her in first and we would discuss my options. He said flowmasters are definately one of the loudest. He loves flowmasters!!! any thoughts! The custom job wont be stainless steel though.

cpr · 12-17-2007, 11:08 PM

I placed a tuneable Supertrapp exhaust, just removed the stock exhaust and these 2.5-3.5 inlet to 4 or 5 inch outlets are tuneable by removing or adding the thin stainless plates to the rear of the muffler!! Fantastic Sound Looking!! and if by a dyno you are able to see the difference with the number of plates, i believe that holley? or Hooker exhaust makes a similar product!! Look on ebay or in jegs? or other performance mags!! Yopu can get them in stainless or painted steel or polished stainless Supertrapp have been around since the seventies and make Mufflers for cars ,bikes and atvs! also!!

Mikey340 · 12-20-2007, 04:13 PM

1st I replaced stock muffs with deletes nascar loud.
2nd I replaced stock resonator with straight pipes lower, deeper less drone.
3rd I fabbed up another axle back exhaust with Flowmaster Super 40's and Borla 5" tips, too quiet for me.
4th swapped deletes fo SLP LM I resonators less popping nice.
5th swapped straight pipes for a Stolen Fox H-pipe. Sweet!!
6th will be Pacesetter longtubes.
All above work was done with stock flanges and piping between resonator and flange.
Hope it helps.
Mike

NJSierra · 12-20-2007, 10:48 PM

darn, it looks like i could stick my arm inside of those large a_ _ tips. Woo, that didnt sound too good. car looks great, Ill show my muffler guy. thanks. You were the most help yet, thanks again. I love flowmaster, I just fathomed something like corsa or magnaflow would do.. I like the stainless steel though.

***another question, the muffler guy told me that the exhaust pipes leading from muffler to tips appeared larger than 2 1/2 inches. His pipe bender won't accept anything bigger. Is this a problem or will i have to buy new tips when and if decided to remove resonator and add flowmasters?