Cobb's 304 stainless exhaust systems use CNC mandrel bent tubing for accuracy and precise fitment and are TIG welded for quality and appearance. This system uses 3 inch diameter tubing from turbo back before splitting into two 2.5 inch tubes feeding separate straight through performance mufflers. The downpipe utilizes a large cast stainless bellmouth design for smooth flow and reduced backpressure. It also incorporates a GESI spun metal substrate high flow cat. Two O2 fittings allow the installation of a wide band sensor for AFR gauge if desired. The twin mufflers exit into quad 3.5 inch tips. The straight through design has been engineered with a sporty sound without being overly loud and obnoxious. Supplied with all necessary gaskets and hardware.
Note that Cobb does not technically sell a downpipe for 2015+ STI models but the listed downpipe can be fitted without any significant issues.
Usually ships in 1 to 2 days.
| Part No. | Description | Price Ea. | Add to Cart |
|---|---|---|---|
| COB-515132 | Cobb Cat-Back Quad Tip Exhaust | $1450.00 |  |
| COB-524210 | Cobb 3" Bellmouthed Downpipe STI | $1025.00 | |
