Mishimoto Cat-Back Exhaust Subaru WRX 15-21 MMEXH-WRX-15
Mishimoto

Mishimoto Cat-Back Exhaust Subaru WRX 15-21 MMEXH-WRX-15

In the rangePart no. MMEXH-WRX-15
Claimed gain
Up to +9whp / +8wtq (93 octane, stock tune)
Material
304 stainless steel, TIG-welded, 4-piece
Pipe diameter
3.0in flange, 2.25in y-section
Fits
VA WRX / STI (2014–2021)
Category
Intake & exhaust
All 10 specifications ↓

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  • Fitment is confirmed, not guessed

    A chassis is listed only where the part is on one of our cars or on the manufacturer’s own application list.

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Specifications

Brand
Mishimoto
Part number
MMEXH-WRX-15
Claimed gain
Up to +9whp / +8wtq (93 octane, stock tune)
Material
304 stainless steel, TIG-welded, 4-piece
Pipe diameter
3.0in flange, 2.25in y-section
Exhaust tips
Quad 3.5in staggered double-wall polished
In the box
2x V-band clamps, band clamp, flange gasket, hardware
Requires
ECU retune recommended with intake
Fits
VA WRX / STI (2014–2021)
Category
Intake & exhaust

Figures as published for this part; fitment is only what we have confirmed. Check critical dimensions against your car before ordering.

About this part

Mishimoto's MMEXH-WRX-15 cat-back exhaust fits the 2015–2021 WRX. It's a 4-piece, TIG-welded 304 stainless system with a 3.0in flange tapering to a 2.25in y-section, finished with quad 3.5in staggered double-wall polished tips. Mishimoto quotes up to +9whp and +8wtq on 93 octane with the stock tune. The kit includes 2 V-band clamps, a band clamp, a flange gasket and fitting hardware, and Mishimoto recommends an ECU retune when it's paired with an intake.

Fitment

Confirmed for the chassis below. We list a chassis only where the part is on one of our cars or on the manufacturer’s own application list.

More like this: VA intake and exhaust parts (116)

We have not run this part ourselves — the ones we have are marked on our cars.