All Small Six Ford Six Mustang Offset/Dual Muffler

[awasson]

Hey guys,
I’ve been considering how best to handle my exhaust before the drone of the existing system wipes out what’s left of my hearing. I’ve got an EBay header into a Y-pipe and 2-1/4 all the way to the back through a very loud muffler before the axle and then the pipe goes over the axle and exits just past the rear valance.

Conventional wisdom says that a single pipe has performance benefits over true duals and I was inspired by some posts on a Mustang 6 Facebook group, so my plan is to keep the Y-pipe and single 2-1/4” to the back, lose the existing muffler and get a single in, dual out muffler from a 3rd gen Camaro and put it between the diff and the gas tank.

Here’s the muffler I’ve chosen: https://partsavatar.ca/walker-usa-direct-fit-muffler-18375

I’ve seen some photos from the rear of a car on the Facebook group but I haven’t seen the way they plumbed the pipes or the muffler hangers. Has anyone here done this type of exhaust on a Mustang or Falcon?

Thanks,
Andrew

 

[John Ha]

I don't have the headers but do have a single 2-1/4" pipe with the muffler in front of the rear axle. My muffler is a Turbo muffler with a single inlet and a single outlet. It's basically routed as a single exhaust V8 would have had it with a hanger just in front of the rear axle and another at the rear a bit before the exit at the valance (mine has a "turn-down" tip that exits just below and slightly behind the rear valance). It's on my 66 Mustang convertible. I don't have any drone issues at all.

 

[awasson]

Well, I got the muffler installed yesterday and I'm really happy with the tone and volume. It was fun with the much louder muffler but this has a nice low tone and seems just fine. Here's a before and after.

Before:
View media item 315
After:
View media item 313

 

[Kritas]

I bought a two-piece header from VI along with one of their 2.25" single pipe exhaust systems. The pipe runs out over the axle as you described but uses a single in/out. The muffler provided by VI sounded a bit too much like a tractor to my ears, so I used this one instead. I'm pretty happy with the sound. The muffler is positioned ahead of the axle.

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I don't have pics of where I welded in the hangers, but I believe I put one forward of the axle just before the muffler and two aft of the axle.