Another exhaust thread...

[351m]

Not sure where this should go but...

I have a Magnaflow muffler on the car now, just for the sound, and in hopes of covering up the annoying exhaust leaks in the Y pipe(Air injection pipe, and where the pipes Y are both leaking) I have a set of stock Mustang headers as crappy as they are.

My question is, If I use the catless H pipe from a Fox body will it fit under the car? Here are the spintech mufflers I am thinking of

Basically the same exit style but I will just get the mufflers and weld up the pipe as needed to fit them.

[cld783]

yes it will

[351m]

Sweet. Now to find some better sounding mufflers for this project.

[gadget73]

Yes, but you will need to extend the mid pipes. Works fine otherwise. If you have a 351, you'll want 351 swap headers, or you will need to modify the H pipe due to the wider 351w engine.

Also, if you have a stock motor, you might want to keep those stock Mustang headers, and go with a 2 1/4" exhaust. The stock motor doesn't really need 2 1/2", though the parts to do that are possibly slightly cheaper than 2 1/4" parts. Using an overly large exhaust will cost you some torque, and with those stock turd heads and camshaft its not going to gain you any horsepower.

[Southern_Pride]

Ive never had to extend the mid pipes with fox body mufflers. Most do, but　Ｉ　ｎｅｖｅｒ　ｈａｄ　ｔｏ．

[351m]

Thats what I figured about the mid pipes. As for the pipe, I don't usually go larger then 2.25" pipe unless I have a big block anyway, for most light builds it should flow more then enough. I found the part # for the Super turbo muffs with the same in/out config as well.

My future build will be a 351W but more setup for torque and propane then to go play at the track. I'm already looking at 10.5:1 cr minimum for that one, large RV cam, maybe a bit more agressive, really haven't put much thought into it yet though.

[Grand Marquis GT]

I would run rear exits with a 4dr, but it's your car

[351m]

That was my plan but there are no shops here that can do mandrel bends and all are saying that they either can't put larger than 2" or it will double the price due to the cutting and welding involved in getting the bends right. Personally I can't understand it as I could have sworn that the older ('78-80 ish) 'stangs ran a similar tailpipe. It just seems easier and cheaper to hand build it and put them in front of the wheels.

[Grand Marquis GT]

Impala SS mandrel bent 2.5" tailpipes. Work well

[Grand Marquis GT]

Oh yeah, here you go:

http://www.grandmarq.net/vb/showthread.php?t=13189

[351m]

Thanks, thats a huge help. Never would have thought of Impala peices.

[Freshmeat]

I installed stock Mustang shorties, stock Mustang H-pipe with gutted cats, Walker midpipes for an '80s S-10, and cheap Summit mufflers. Some parts store hangers at the backs of the mufflers and I was rocking a complete exhaust that sounded awesome for about $125. Either run the Impala tails or don't run any at all. Side exit on a big ass four door car would look dumb in my opinion. With no tails my LTC has a decent rumble around town but I can't hear it at all on the highway.

[351m]

I'm looking into the Impala tails, if I go with dumps I won't last long here, it must exit from under the vehicle. I am looking into custom springs for around a 2" drop in front and 1" out back so the side exits may cause problems there as well.

[Freshmeat]

You don't need custom springs for a 1" rear / 2" front drop. Check the suspension forum for information on spring swapping.

Down here in Louisiana the only exhaust requirement is that it exit behind the passenger compartment, namely the rear doors... so side exit in front of the rear wheel wells is a big no-no on these cars.

[1987cp]

yep-yep-yep, +10 on the S-10 midpipes. PN 43281, I think it is? 2.25", and they bolt to the Fox crossover assembly and fit the chassis great. Got those under the wagon. Maremont 339221, as I recall, is the same thing but in 2.5". Got a pair of those slated to go under my P72 later on.

BTW, for a mild application, there's nothing wrong with using stock 2" tailpipes. Most of the restriction is further upstream anyway. lincolnmania uses 2.25" in/out pipes and fills the gap with weld, but under my wagon I have stock-replacement '95 Caprice mufflers with 2.25" in and 2" out that work great.