STM Tuned WRX/STi 2015-2020 Cat-Back Exhaust
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Payments from $228.37 with

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The STM Stainless Steel Cat-Back Dual Exit Exhaust for the 2015+ WRX and STi will bolt up to your stock or aftermarket downpipe and gives you everything you want out of a catback exhaust! Full stainless steel construction, gorgeous design and hand-fabricated in the USA. The STM Exhaust utilizes your existing exhaust hangers and includes all gaskets and hardware for a clean and easy installation.
Features & Specifications:
- Weighs 31.3 Pounds (Including Hardware & Gaskets)
- Factory Cat-Back Weighs 38 Pounds
- 6.7 Pounds Lighter Than Stock
- Tig Welded
- Back Purged
- 3" Piping to The Y
- 2.5" Piping From The Y to The Tips
- Mandrel Bent
- Full Stainless Steel
- Tig Welded
- Back Purged
- Gaskets & Hardware Included
- Bolts to Factory Locations
- Polished Blue Tips
- Beautiful Fit and Finish
Vehicle Fitment:
- 2015-2020 Subaru WRX
- 2015-2020 Subaru STi
Install Notes:
- We include 5 gaskets for this 4 gasket install.
- (1) 3" and M10 hardware for the center pipe to axle back
- (2) 2.5" and M10 hardware for the axle back to tips
- For the cat-back to stock downpipe use the 2.5" gasket and M8 hardware
- For the cat-back to 3" aftermarket downpipe use the 3" gasket and M10 hardware
Made in the USA!
Lifetime Warranty on STM Parts to the original purchaser against manufacturing defects.
Includes:
- (1) STM Stainless Exhaust (4 Piece)
- (2) 3" Remflex Gaskets
- (3) 2.5" Remflex Gaskets
- (8) M10 x 35 Bolts
- (8) M10 Nuts
- (2) M8 x 30 Bolts
- (2) M8 Nuts