SpecterGT260

Alright, for my dad's birthday I wanna get him some weld in mufflers for his showroom stock 03 Mach1. so, my question is, on the stock mach1 exhaust, what is the muffler in/out size, and what is the muffler pipe pattern?ie. where do the in/out pipes sit on the muffler? Im probably going to go with regular flowmaster 40's since i dont have much to spend, its just hard to find some for a decent price.

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it trapped 115 a few thousand dollars ago

SpecterGT260

how do dynomax sound on mustangs as weld ins? i saw a youtube vid, it didnt sound bad. i just want something that makes his car sound like an actual muscle car.... that stock exhaust is SO quiet, and the mustangs sound so good with a little open muffler on them. the issue is i can get dynomax for 40 bucks each where the flows are 80 each.....

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it trapped 115 a few thousand dollars ago

whodini72

I think they are all 2 1/2 inch.

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'04 Mach 1, Torch Red- Flowmasters, C&L CAI, PHP intake spacer, SCT Tuner, MT slicks on weld drag lites for the track, nitto 555 drag radials for the street- SOLD '02 GT vert

jmac72187

The stock mufflers are 2 1/2" diameter. They are offset/offset and 14" long.

I would go for Magnaflow. I think they are about $70-80 each, but they are stainless.

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2004 Torch Red Mach One

I like to drive around cones.

SpecterGT260

offset from eachother too right? not both offset to one side? thats about the same price as flows, so i will probably go that route since i like magnaflow over flowmaster. i didnt expect them to be so expensive for just the muffler itself though.....

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it trapped 115 a few thousand dollars ago

darkmach1

I got the flowmasters and they sound great!

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K&N FIPK, Flowmaster weld ins and Steeda tri-ax shifter
268whp and 291 wtq
1/8mile- 9.10 @ 78mph w/ 2.25 60ft

Furinox

stock piping is 2.25, and regular magnaflows wont really be any louder than the stock setup. If he plans on keeping the stock midpipe get some dynomax bullets to weld in. They are like loudmouth 2's and sound great with the stock midpipe.

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Just some bolt ons and bolt ins by Manley, JE, and Vortech.

Furinox

I had these on my GT

http://www.jegs.com/i/Dynomax/289/24215/10002/-1

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Just some bolt ons and bolt ins by Manley, JE, and Vortech.

SpecterGT260

u gotta remember hes an old fart. the idea is not much difference until he gets on it, and then I want a nice healthy roar. im having a hard time believing flows or magnas wont change sound, this car is so freakin quiet right now.

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RIP http://www.mustangforums.com/m_2239114/tm.htm


it trapped 115 a few thousand dollars ago

whodini72

I have flowmasters, and it made a world of difference as far as sound goes. I think you would be ok with magnaflows or flowmasters, just yourchoice.

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'04 Mach 1, Torch Red- Flowmasters, C&L CAI, PHP intake spacer, SCT Tuner, MT slicks on weld drag lites for the track, nitto 555 drag radials for the street- SOLD '02 GT vert