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Subaru Exhaust Adapter, Stock Downpipe to 3” Exhaust

Subaru Exhaust Adapter, Stock Downpipe to 3” Exhaust

Regular Price: $62.40

Sale Price $46.95

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Installation Difficulty

  • Allows smooth exhaust flow transition between stock downpipe and 3" sized exhaust
  • Eliminates infamous exhaust leaks caused by mating different exhaust flanges
  • 304 stainless steel adapter will not rust in harsh climates
  • Installs in under 15 minutes
  • Includes stainless steel hardware and 3" 2-bolt flange gasket
  • Mishimoto Lifetime Warranty

Don’t let a pesky exhaust leak ruin the beautiful tone from your turbo 2015 WRX exhaust. The Mishimoto 2015 WRX Exhaust Adapter allows a smooth exhaust flow transition between your stock downpipe and your 3" sized exhaust. The engineers at Mishimoto know your Subaru was built for harsh climates, so they designed this adapter with 304 stainless steel material so it will never rust. This 2015 WRX adapter installs in under 15 minutes and includes stainless steel hardware and a new 3” 2-bolt flange gasket, making installation simple.

This 2015 WRX exhaust adapter mates directly with your stock 2015 WRX exhaust flange and gets rid of any exhaust leaks when combining with the Mishimoto 2015+ WRX/STI Cat-Back Exhaust . Whether you are entering your 2015 WRX in the local rallycross or lapping at your next track day, trust Mishimoto and our line of 2015 WRX parts to keep your WRX cool. This 2015 WRX exhaust adapter, like our entire line of 2015 WRX parts, includes the signature Mishimoto Lifetime Warranty.

Mishimoto Automotive (“Mishimoto”) warrants its products under this lifetime limited warranty policy (“Warranty Policy”). This Warranty Policy applies solely to: (i) Mishimoto Products purchased directly from Mishimoto or Mishimoto authorized dealers (each a “Mishimoto Product” and collectively, the “Mishimoto Products”) and (ii) the original purchaser of such Mishimoto Product (“Purchaser”). This Warranty Policy is non-transferable and all claims under this Warranty Policy must be accompanied by the original sales receipt. The terms and conditions of this Warranty Policy are subject to change by Mishimoto at any time without notice.

For our complete warranty policy, please click here.



Purchase Includes (1) 3” to 2.5” Exhaust Adapter
(1) 3” 2-Bolt Flange Gasket
(2) Stainless Steel Bolts, Serrated Flange Nuts & Washers
Mishimoto Lifetime Warranty

Fits 2001+ Subaru WRX
2004+ Subaru WRX STI
2004+ Subaru Forester XT
2005+ Subaru Legacy GT
2005–2009 Subaru Outback XT

Engine Codes EJ255, EJ257, FA20DIT

Chassis Codes BL, BP, BM, BR, GH, GE, GR, GV, SG5, SH, VA

Weight 2 lbs

Overall Width 1.54"

Overall Length 3.94"

Overall Height 5.24"

Flange Material 304 Stainless Steel

Pipe Material 304 Stainless Steel


Does the stock flange have to be cut and this welded on?
BY:Patrick O'Neil | Mar 18, 2017

Hello Patrick,

Thanks for the message!

To confirm, model number MMEXH-ADAP-SDAE, the Subaru Exhaust Adapter, Stock Downpipe to 3” Exhaust is installed in between the stock downpipe and your 3" exhaust. There is no welding required.

Please feel free to contact us directly at if you have any additional questions!

Pat M

BY:Pat Muschamp (Admin) | Mar 20, 2017

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