Exhaust system 13 GT - Forums at Modded Mustangs
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post #1 of 7 Old November 13th, 2017, 10:29 AM Thread Starter
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Exhaust system 13 GT

What's up guys.. looking for some suggestions for changing my exhaust.

Started with a borla stype catback with borla LTH and x pipe. This setup was insanely loud, droney, and pretty high pitched to the point of it being annoying. So first thing I did was swap the stype mufflers for touring to try to lower it a bit. I noticed the drone improve slightly but still wasnt getting the sound I wanted. So I decided to have 2 ultra quiet resonators welded in. This completely eliminated the drone and pretty much any sound under 2000 rpm. The sound above that and up to full throttle is very aggressive which is awesome, but idle and cruise is just embarrassing.

Not really sure what to do with it at this point. Borla doesnt make an h pipe but i could probably get one welded in. Maybe a different axle back minus the resonators would do the trick? I want a nice deep muscle car sound especially at idle and cruise but my original setup was just too loud in a bad way. More like a high pitched trumpet than a deep growl.

Any suggestions at all are greatly appreciated. I should've done more research before doing all this, but it is what it is.
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post #2 of 7 Old November 15th, 2017, 04:27 PM
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Try finding sound clips for setups on a similar car and go from there. An H pipe for your car (shorty H) will work, even if it isnt borla brand. This will give a deeper rumble, rather than a higher pitched whine of the X pipe.

Also, take a look into J tubes. it is a modification done after the muffler, that is essentially a "J" welded on to the pipe, that does not exit. it may cost you a tiny amount of power (1hp or less) but likely wont. Basically these are tuned (in length/angle) to the frequency which your drone occurs at. This way, you can take the resonators out for the loud cruise/idle, but eliminate the drone.

This is one example of the J tube use "https://www.reddit.com/r/FocusST/comments/2bhxza/fixing_exhaust_drone_with_resonator_tube_aka_j/"

If you cant get the sound you want with the borlas, and an H, you may need to swap axlebacks to a different setup. Like I said, soundclips are your friend. take a look at youtube and go from there.

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post #3 of 7 Old November 15th, 2017, 06:44 PM
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You’ll have better luck posting this in the 11+ section.

Originally Posted by brtnstrns View Post
I'll toss that dude's salad

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post #4 of 7 Old November 18th, 2017, 05:14 PM
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I have an MRT 3" H-Pipe "For Sale" if you are interested......deeper sound with stock cats!!
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Last edited by Coosawjack; November 23rd, 2017 at 12:59 PM.
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post #5 of 7 Old November 19th, 2017, 02:43 AM
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It'll be hard to get a low,rumbling sound with an xpipe in place.Theyre designed to create a high pitched raspy sound.

The following link was a muffler dyno/decibel test done by Muscle Mustangs & Fast Fords magazine.

Ford Mustang Muffler Comparison Test - 5.0 Mustang & Super Fords Magazine

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post #6 of 7 Old December 2nd, 2017, 08:44 PM
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H-Pipe is the way to go for lower end rumble. Kooks has one for around $150 (alumanized steel) and mishimoto has a stainless for about $250.

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post #7 of 7 Old December 14th, 2017, 05:20 PM
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I sent you a PM about the Kooks H-Pipe Mike!
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