STM WRX/STi 2015-2020 Axle-Back to Cat-Back Upgrade

If you already purchased the STM Axle-Back Exhaust, you can purchase the rest of the cat-back system separately for a full upgrade! This *should* also be compatible with many other aftermarket axle-backs that have a 2.5″ flange and bolts to the stock locations, but please confirm before purchase.
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.
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
Features & Specs
• 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
• Beautiful Fit and Finish
STM Products are made in the USA!
Lifetime Warranty on STM Parts to the original purchaser against manufacturing defects.
Includes:
(1) STM Stainless Exhaust (Mid and Y Pipes)
(2) 3″ Remflex Gaskets
(2) 2.5″ Remflex Gaskets
(8) M10x35 Bolts
(8) M10x1.5 Nuts
(2) M8x30 Bolts
(2) M8x1.25 Nuts
Shipping Times: 4-6 Weeks
Hand crafted and welded in New York, please give our fabricators time to create your piece!
See more STM Products