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post #1 of 11 Old 12-07-2013, 08:53 PM Thread Starter
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LQ4 swap exhaust questions

I recently acquired a LQ4 swapped fox coupe. It has 351 swap headers with ls flanges, 3" pipe from the headers back to a pair of 3" mac catback. The exhaust shop that did the exhaust did not install a x or h pipe so It sounds like a Chevy mud truck! My question is, since it has the mustang headers and catback will a x or h pipe bent for a fox body fit? Can some of you mustang swapped guys post pics of your exhaust?
Thanks!!!


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post #2 of 11 Old 12-07-2013, 11:19 PM
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Originally Posted by ruffledfeathers View Post
I recently acquired a LQ4 swapped fox coupe. It has 351 swap headers with ls flanges, 3" pipe from the headers back to a pair of 3" mac catback. The exhaust shop that did the exhaust did not install a x or h pipe so It sounds like a Chevy mud truck! My question is, since it has the mustang headers and catback will a x or h pipe bent for a fox body fit? Can some of you mustang swapped guys post pics of your exhaust?
Thanks!!!
thought about trying to buy a premade foxbody exhaust and just modifying it to match up with my headers....
but after seeing a buddys exhaust on his 5.0 non swap fox...I decided to just make my own

my mufflers would have fit in the stock location...but I decided to put them at the rear since I have a fuel cell with a sump and no stock tank...
gave me more room to get 3" over the axle on each side.














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post #3 of 11 Old 12-08-2013, 09:19 AM Thread Starter
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How does it sound with the mufflers at the rear? The 3" Mac cat back that's on the car fits pretty good now. Just sounds bad.

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post #4 of 11 Old 12-08-2013, 11:29 AM
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Haven't fired it up yet...still have a few things to do before I can start it
Hoping to start the engine here in the next week or two if we get a little warmer temperatures for a few days..
Not even gonna try in weather under 40*

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post #5 of 11 Old 12-08-2013, 11:40 AM Thread Starter
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well if it sounds as good as it looks then it should sound pretty good.

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post #6 of 11 Old 12-11-2013, 09:32 AM
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I haven't gotten that far in my swap yet, but all of my research suggests that if you use the 351 swap headers the Fox x-pipes will bolt up no problem. With that said, trans crossmember, and the trans itself should be taken into consideration for clearance. Might be worth picking up a cheap used pipe to check fitment, if it works great, if not re-sell it. LS1 tech has all sorts of info on theses swaps, lots of mustang guys there.
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post #7 of 11 Old 12-11-2013, 01:33 PM
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Pypes makes a universal x pipe,works great
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post #8 of 11 Old 12-11-2013, 02:32 PM Thread Starter
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The pipes universal in aluminized cast 2 times what the jegs or summit univeral costs.... Maybe I can find a good deal on a used one. Before I was looking they were all over the place. now I cant seem to find a good deal on one LOL

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post #9 of 11 Old 12-18-2013, 07:56 AM
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I used summit universal X pipe kit, Dynomax Bullets and turn downs.
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post #10 of 11 Old 12-18-2013, 08:14 AM Thread Starter
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Do you have a sound clip?

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post #11 of 11 Old 12-22-2013, 04:17 PM
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This is the 3'' SS pypes I used
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