GT500 Mufflers on 2015+ Mustang

calebdnehus

Member
Established Member
Joined
Feb 12, 2016
Messages
225
Location
South Central US
Has anyone managed to fit the 2011-2012 GT500 mufflers on the S550 body style mustangs? I searched this forum and the mustang 6 gen forum and couldn't find a thread. I remember seeing one on mustang 6 gen but couldn't find it back. Just bought a lighting blue 2017 performance pack today
 

SID297

OWNER/ADMIN
Administrator
Joined
Mar 27, 2003
Messages
52,463
Location
Myrtle Beach, SC
Can't say that I've seen it done, but I haven't been looking. Those GT500 mufflers are super heavy though. There are much lighter aftermarket alternatives.
 

calebdnehus

Member
Established Member
Joined
Feb 12, 2016
Messages
225
Location
South Central US
Can't say that I've seen it done, but I haven't been looking. Those GT500 mufflers are super heavy though. There are much lighter aftermarket alternatives.

You wouldn't happen to know which aftermarket muffler has the closest sound to those GT500's without drone? I tried a few on my last 2016 and they had drone that I hated. I had those 500's on my 13 and they sounded great with ZERO drone.
 

[email protected]

Authorized Vendor
Authorized Vendor
Joined
Jul 13, 2005
Messages
2,249
Location
CA
One of my customers has done it. Best sounding S550 mufflers IMO.
You have to cut/weld them in place but they do fit with custom exhaust work.

The Roush with Cats sounds very close to the GT500 without cats.
Boss mufflers also have a similar sound. I want to say the Stock S550 mufflers + off road exhaust sound very close to the GT500/Boss's but I've not heard one in person. Adam at RevAuto has stock mufflers on his car with ARH exhaust and from what I'm told it sounds excellent.
They are all OE chambered designs.
 

calebdnehus

Member
Established Member
Joined
Feb 12, 2016
Messages
225
Location
South Central US
One of my customers has done it. Best sounding S550 mufflers IMO.
You have to cut/weld them in place but they do fit with custom exhaust work.

The Roush with Cats sounds very close to the GT500 without cats.
Boss mufflers also have a similar sound. I want to say the Stock S550 mufflers + off road exhaust sound very close to the GT500/Boss's but I've not heard one in person. Adam at RevAuto has stock mufflers on his car with ARH exhaust and from what I'm told it sounds excellent.
They are all OE chambered designs.

That may be what I do. I learned my lesson last time with headers, I'm going to use Kooks offroad 1 3/4 this time so I guess I'll just leave the stock mufflers on for now and see what they sound like paired with an off road header/resonator delete h-pipe.

P.S. Shaun, I'll be getting in touch soon for tunes on this 17 M6 as well, Just a heads up. Lol
 

calebdnehus

Member
Established Member
Joined
Feb 12, 2016
Messages
225
Location
South Central US
I have GT500 mufflers on my 2015. Best axleback option for the S550.

Yes, I'm interested as well. I know the hangers seem a bit different than whats on the S550 mufflers. Did you have hangers welded on the GT500 mufflers for extra support or did you just go with what the S550 was able to accommodate?

How was the install? Was welding required?

Welding will be required on the actual piping of the muffler and the car but I'm sure you knew that already since you own an S550. Jus thought I would chip in with that info
 

DarkMach1

Well-Known Member
Established Member
Joined
Apr 1, 2009
Messages
2,097
Location
Florida
Cost me about $100 bucks to install, took them about a little more than an hour. No "buts", I drove in and said I want these mufflers on this car, they said no problem. I say this because a lot of muffler shops are giving people a hard time about installing them and I believe is because they want you to buy their mufflers instead. The factory hangers on the GT500 muffler will be cut off and a new one will be welded on the top inner part of the muffler to match the S550 hanger (1). Then in my case, they cut the last 90* bend on my factory muffler off, shortened it a couple inches and made the connection from the GT500 muffler to the stock piping on the car, in some cases they will use their own piping for this. the reason for shortening the last bend is because the inlet to the GT500 muffler is closer to the centerline of the car vs the stock mufflers inlet.
 

calebdnehus

Member
Established Member
Joined
Feb 12, 2016
Messages
225
Location
South Central US
Awesome, I'm going to hunt down a set for my car then. Had these on my 2013 with off road H pipe and it sounded like AMAZING. What else do you have do to your car exhaust wise and would you mind to share a sound clip or even just text it to me if you wanna do that
 

DarkMach1

Well-Known Member
Established Member
Joined
Apr 1, 2009
Messages
2,097
Location
Florida
I'll post some clips shortly. Car has catted longtubes, stock resonator, GT500 mufflers.
 

5.0jake

Member
Established Member
Joined
Aug 4, 2010
Messages
751
Location
USA
Thanks for the info. I had the 500's on my 12' GT with off road catless X pipe and though it sounded awesome!
 

calebdnehus

Member
Established Member
Joined
Feb 12, 2016
Messages
225
Location
South Central US
I love it. And driving on the highway at 60-70 you wouldn't even know the car has any exhaust mods lol.

Thats exactly how my 13 was. I personally think those are the best sounding mufflers for a 5.0

Thanks for the info. I had the 500's on my 12' GT with off road catless X pipe and though it sounded awesome!

Same here, had a 13 with these and an off road h pipe and it sounded like a hoss. I hate myself for getting rid of that car. Lol, she got after it for sure
 

20redfire03

Active Member
Established Member
Joined
Jan 7, 2011
Messages
1,272
Location
VA
Would the 13-14 GT500 mufflers fit on the S550s? I have a set and a buddy of mine has a '16 and if they fit he may purchase them from me.
 

Users who are viewing this thread



Top