I have been looking and reading and I watched all the videos in the exhaust section, but I'm still confused. Basically, What is a good and LOUD muffler that is actually louder than the shelby mufflers it comes with? I've been looking at flowmaster 40 series but I don't know if they would even be louder.

Also, I think I want a H Pipe, but it looks like the factory exhaust already has a sort of x-pipe design, towards the front of the car, the pipes bend toward each other and are welded together, but I can't tell if they actually are cut to flow into each other, or, just welded together seperately. Any help would be greatly appreciated. Thanks

I've uploaded a few pics of my car in my profile if anyone's interested. It won't let me use an attachment for the picture thread yet because I'm a newbie!

 

I installed the KR mufflers (Ford Racing M-5230-S) on my 07 GT500 and love em!

Simple to install too.

http://www.svtperformance.com/forums...-mufflers.html

 

Thanks 6-Speed! I appreciate the info, very infomative. I'm going to look into that. How much of a "meaner" and louder sound did the KR mufflers make?

 

They are way better than stock, but not objectionably loud. They let out a mean growl at start-up and during spirited acceleration, but otherwise during cruise, they are fairly quiet. IMO the brushed stainless steel exhaust tips look pretty good.

 

I think spowers1 has a Shelby GT and not a Shelby GT500. I believe the stock Mustang GT came with a H pipe. I don't know if that was changed to a X pipe when Shelby built the Shelby GT or not. I know the KR mufflers sound great on the GT500 because I have them on my car. I don't know how they would sound on the Shelby GT since it is a 4.6 vs a 5.4 engine.

 

spowers,

I felt the same way as you with the stock GTA's on the Shelby GT. I ended up with a pair of Ford Racing 5320's. To me they are perfect. I think they are considerably louder than the stockers. They sound great on startup and really rip when wide open. They do drone a little if you lug it in a higher gear, but a simple downshift and some extra rpm's will fix that. They will bolt right up to the stock pipes, and the hangers will line right up. As far as the X-pipe, your car should have been shipped from Shelby with it. I believe it is only clamped in place, not welded.

 

VaporDude, you're right it's not the GT 500, just a Shelby GT with the 4.6. Upon more research I've found that Shelby did do an exhaust upgrade which includes the X pipe. Thanks for your input.

 

SilentG, I have been looking around a lot and I'm really torn between the SLP Loudmouths and the 5320's. The SLP's are cheaper and definately loud! But, they might be a little too loud and maybe even a little raspy.

The 5320's are more expensive, but I would feel better that it would be closer to original, a clean and easy install, but I'm not sure they would be loud enough. It's very hard to tell from a video through computer speakers! I wonder if my local dealership has a KR on hand lol! Thanks bro! By the way you're right, it did come with the X pipe from Shelby already. I should have known that...

 

hey spowers, i hear ya on the gta's.... i went with slp loud mouths and loved em.... their not to loud trust me. i had them for awhile but i wanted alittle more aggressive tone so i went o/r x and corsa xtreme's..... i bet you would like corsa's too..... listen to as many AB's as you can before buying anything....to be honest, you cant go wrong with loud mouths.... GL bud.... nice s-gt btw

 

Here is an example of the KR mufflers on my car.

http://www.youtube.com/watch?v=dAUfrNQ2bXI