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Discussion Starter · #1 · (Edited)
Just purchased a 2016 STI and decided to put the car back to stock. The previous owner had a Cobb Cat-Back exhaust installed, which is now up for sale. Construction is 304 grade stainless and the workmanship / TIG welding is first class. Fitment on my vehicle was perfect.

Overall the system is in excellent condition - no major scratches or dents, flanges are all in great shape and I've even washed it to take off the patina of dirt. Total accumulated mileage is somewhere less than 22,000 - can't say for sure as I don't know when it was installed. This car came from Texas, so no winter road salt to affect the finish.

Price from Cobb: $1295 + tax + shipping
Price from me: $950, all in

Other things to be aware of:
  • Although I have the nuts and bolts that were provided by Cobb, they're a bit pitiful. First off, they're not stainless steel and second they're not even metric 10mm, but 3/8" UNF. You can use them, but I'd recommend replacing them with stainless metric hardware from McMaster Carr - here are the McMaster part numbers / descriptions that I used to put the original system back:
92773A103 316 Stainless Steel Serrated Flange Locknut Super-Corrosion-Resistant, M10 x 1.5 mm Thread, packs of 10 (1 Pack)
94316A330 Bumax 109 Stainless Steel Flat Washer, M10 Screw Size, packs of 5 (2 Packs)
92290A520 Super-Corrosion-Resistant 316 Stainless Steel Socket Head Screw M10 x 1.5 mm Thread, 25 mm Long, packs of 5 (2 Packs)

  • I've included the old gaskets, in case you can match them up with something at your local auto store. There's one 3 inch gasket and two 2-7/16 inch gaskets and should be easily available. I've also included the cone shape gasket from the front of the system, which may or may not be reusable.

  • There are no hangers provided; either reuse your old ones or buy new polyurethane jobs from Cobb

One final point...due to the size and weight, you'll need to pick this up; I will not ship. Location is Far NW Chicago suburbs.

Also posted on eBay: Cobb Stainless 3" Cat-Back Exhaust for Subaru 2015-2017 WRX / 2015-2017 STI | eBay


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