Just bought some GT500 mufflers off a guy. Are these more or less the same as GT mufflers?

[ghunt81]

So I found some mufflers on Marketplace, I thought they were just regular GT mufflers with some tips welded on but when I went to pick them up I found out they were '07-09 GT500 mufflers, part number F1-8143-R. I currently have OEM GT mufflers on my car, if I swap them out for these will they sound the same?

 

[rocknrod]

You wouldn't think they'd make GT500 mufflers and make the same muffler for the GT sound wise. But then again I'm not a bean counter.

 

[JimC]

The 07 Shelby used a lot of things from the Ford parts bin. The mufflers are the same as those found on the GT with an automatic, just different tips.

 

[pass1over]

GT500 mufflers are different than regular GT mufflers.

I had a set of 2012 GT500 mufflers on my GT and they are a bit louder. Still have them if anyone wants them.

 

[JimC]

You are correct for the 2012. Ford started using a Shelby specific muffler in the 2010 model year.

But the OP asked about 2007-2009 mufflers. And for 2007-09 Ford simply went to the parts bin and used the same muffler as found on a GT with an automatic transmission for the Shelby. Just as they used the V6 spoiler on the 2007 and maybe 2008.

I found out they were '07-09 GT500

 

[pass1over]

 

[ghunt81]

So I noticed "Automatic GT" mufflers are specified here, were the mufflers different between manual and auto GT's?

I also noticed the GT500 mufflers don't neck down to 2 1/4" inside the muffler inlet/outlet like my 2005 GT mufflers do...or maybe they fixed that in 2007, I dunno.

Anyway thanks for the info! Planning to swap these onto my car because the factor GT tips are pretty boring. I like the 4" GT500 tips.

 

[JimC]

Yes, there were different mufflers for automatic and manual GT's in 2005-2009. The automatic are a little quieter.

 

[ghunt81]

OK I put these mufflers on my car over the weekend and holy shit they are loud! Honestly sounds incredible, I had wanted a little more sound over the OEM mufflers but not the drone and these are perfect. I need to get a video. I'm not sure what the difference is since they look identical to my OE mufflers but I'm keeping these for sure.

 

[MrBhp]

Hmmmmm. I'm guessing you guys are talking about the GT500. Not the Shelby GT. My 2007 Sheby GT came with a different exhaust from the cat’s back. X-pipe to mid-pipe resonators to no mufflers after axle. That would have all been installed in Las Vegas. Of course the GT500's were not built by Shelby.

 

[JC SSP]

I thought the Shelby GT came with the same mufflers as the Bullitt?

 

[ghunt81]

Part number on the muffler comes up as '07-09 GT500 muffler. There was also an aluminum band around the end where they clamp on that said SVT.
Anyway, I took a short video after work- sorry this video is pretty much audio only because I aimed the camera wrong, but it's for the sound anyway.

The guy I bought these from said they had been sitting outside for awhile (they had a mildewy smell), so if these have packing in them it must be all matted down or something, I dunno. What I do know is this is the favorite axle back I've had on this car yet. Sounds great, no drone except a little at 2000 RPM in 5th gear.

 

[JC SSP]

Never seen the mufflers before but they do sound NICE!

 

[MrBhp]

I thought the Shelby GT came with the same mufflers as the Bullitt?

Probably shipped from Ford that way. So much of the GT's was a la carte, it's hard to say what is and isn't.

 

[ghunt81]

Never seen the mufflers before but they do sound NICE!

Best part is I got these for $50!

 

[JC SSP]

Great deal!!!