Tass 928

While I'm under the Cabrio changing a gas tank I decided to ditch the rusty aftermarket muffler and look for a stocker. I put together this quicky RMB from scraps that were on hand and at least for now it wont sound like a wheezing rusty muffler.

Very "Ricey" but its temporary

Mark Anderson

Tass 928

Tempting ! Unfortunately I have reached a point where I'm seeing the value of steering 928 projects back towards stock original equipment.

The gas tank and muffler issues were distractions from the original project.....I'll be back to you with the ball joint / steering rack order

Mark Anderson

original exhaust are hard to come by but consider a 1986.5 rear muffler as they are easy to find and cheap. You will have to modify it

Tass 928

What is the mod? It looks like a some reworking of the inlet pipe? Are the brackets and outlets the same as early cars?

Mark Anderson

To be clear I have never done this but I’ve sold mufflers to a few that have.
The outlets are identical and the hangers I think are the same as 80-85

Rob Edwards

Find an 80-82 single inlet muffler (they're single inlet) and mate the inlet pipe of the Borla to it, so it bolts up to the 78-79 intermediate pipe.

Original '78 muffler on the right, '80-82 on the left. (The inlet from the '78 is gone, rusted out).



After grafting on the '78 inlet, and cutting off the rear bracket, to allow the use of the bolt-on '78 bracket:

Jadz928

I have in the works a twin tip, slant cut, resonator RMB for the 4-bolt flange early 928.
The goal is for a near, stock appearance, plug & play.
Should work very well with the stock Euro system (catless, w/premuffler). Questionable is how will it sound on a US with cats.
Project came out of necessity for a client car where the original 'pumpkin' is NLA, but we wanted a stock appearance.
Fast fact, there are 43 pieces for the '78 rear muffler assembly!
Prototype fitup is this week. Will follow-up with pics.

Jadz928

Happy with the results, for a prototype.

AirtekHVAC

Hey Jim, looks good, that would be a good option for my 79 euro, one of these days....