355 Mystery Exhaust

It looks a bit like a Borla, but doesn’t have the Borla markings on the cans. The layout and the tips are the same though.

 

X-OST?

 

No way

 

Here are a few photos of the one that came on my car ( replaced with Capristo). The sound of the Borla is quite nice, the by bypass is obviously pretty raw.
Looks the same as your, except for the « Borla » stamped onto the cans.
I haven’t found much info about these on the internet either.
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RIP Alex Borla, the founder of Borla exhausts. He passed away a couple of months ago. A great man and great American, and someone I got to know a little bit.

 

This one certainly stumped me. Without Andrew this would go into the 355 unsolved mysteries file.

 

Greg,

You might have a Borla prototype F355 muffler and perhaps that's why it's not embossed.

Borla was once a sponsor on FerrariChat. I remember, years ago, the company trying to increase their repertoire and offering to make mufflers for the F355. They were already producing mufflers for the 308 and 308 GT4, all with their signature intercooled exhaust tips which they still offer today...


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Once your son is finished cleaning and polishing it up, you'll have a well-made and nice-sounding exhaust.

Barry

 

The 2.7 Y pipe has a flange that mates to the muffler that can be rotated. That’s where your problem is. It was designed for a 2.7 install.

 

Jumping in a bit late, but yes - exactly as Elliott mentioned, on a 2.7 the flange on the Y-pipe swivels around.

Have you already checked the connection between the cats and the inputs to the muffler? The Borla uses the "expanded pipe" for a slide together connection (typical muffler connection), but the original connections uses a flange connection (much nicer). The half of the flange on the cats should simply slide off, and then the cat exit pipe should slide into the pipe on the Borla (and then a muffle clamp to hold together), but on mine the whole slip fit pipe situation was a bit of a mess (the slot cut into the muffler pipe started to split). That will probably take some fiddling to get right.

For the thermocouple bung I would try McMaster Carr.

 

@INTMD8 ?

 

They are all over the place, very common item mane verities from screw in to weld on. Google 'thermocouple bung' or ''THERMOCOUPLE COMPRESSION FITTING' and go to images.
http://thesensorconnection.com/thermocouples/all-thermocouples/thermocouple-compression-fitting-adapters-14-npt-thread-316-stainles
https://evosensors.com/collections/stainless-steel-compression-fitting

 

That’s great news, Greg!

Barry