STM Catted Downpipe/J-Pipe for 2022+ WRX

STM Tuned Inc.



We price match!

The STM 2022+ Subaru WRX catted downpipe is now available! Also called a j-pipe or jpipe, this part connects from the turbo to the cat-back exhaust and is capable of flowing 850 horsepower. Faster spool and increased power throughout the entire power band makes this piece a must-have to take your car to the next level!

Vehicle Fitment:
2022 Subaru WRX
• Confirmed with 6-speed manual, not yet confirmed with CVT models.

More Info:
This downpipe fits with the stock exhaust or aftermarket cat-back systems that bolt to the factory locations. We include new 2-bolt gaskets and hardware, but if you need to replace the turbo gasket, we recommend the GrimmSpeed Turbo to Downpipe Gasket (026003) Two o2 bungs are included for the front and rear oxygen sensors and stainless hardware is provided for the ground strap. The factory downpipe weighs 24.7 and the STM downpipe weighs 16.2. You'll save 8.5 pounds, gain power, have a fully stainless exhaust that won't rust out and it sounds great!

Features & Specs:
• 400 CPSI GESi Gen 2 G-Sport UHO EPA Converter (85230)
• Supports up to 850 HP
• Hand Fabricated, Tig-Welded, Back-Purged
• Full Stainless Steel
• 3" 2-Bolt Exhaust Flanges
• Two O2 Bungs
• Gaskets and Hardware Included
• Bolts to Stock Turbo and Cat-Back
• Fits with Stock-Placement Cat-Back

• STM Downpipe weighs 16.20 Pounds
• OEM Downpipe weighs 24.70 Pounds
• Save 8.5 pounds

Made in the USA!
Lifetime Warranty on STM Parts to the original purchaser against manufacturing defects.
* This does not include the natural life of the converter *

(1) STM J-Pipe with GESi Cat
(1) STM Center-Pipe
(2) Remflex 3" Gaskets
(4) M10 x 35 Bolts
(4) M10 Flat Washers
(4) M10 Nuts
(1) M6x10 Stainless Bolt
(1) M6 Stainless Lock Washer
(1) M6 Stainless Nut

Shipping Times: 1-10 Days
Hand crafted and welded in New York, please give our fabricators time to assemble your piece!

For Racing Use:
Please check all your local laws before purchase.

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Customer Reviews

Based on 2 reviews
aidan midkiff
Makes the car more alive

After installing and pro tuning it, the driving experience it so much more fun and raspy

Nick Esposito (New York, NY, US)
No cel.

Been running the stm gesi jpipe for over 1500 miles no cel. Not that it’s a big deal if I get one. I can always just clear it.

Just make sure to add a grimmspeed jpipe to turbo gasket to your cart before you check out.

Cancer and Reproductive Harm