STM 3.5" Downpipe - 2017+ Audi RS3

STM Tuned Inc.


Vehicle Fitment:
2017-2019 Audi RS3

The STM 2-Piece 3.5" Downpipe is the perfect addition to your RS3! Beautifully crafted in the USA, this stainless steel downpipe features a billet v-band flange to mate perfectly to your factory turbo, full 3.5" construction then merged into two 2.5" outlets to mate up to your stock or factory-style cat-back exhaust.   

Three oxygen sensor bungs are included for the factory front and rear sensors as well as an extra bung if you choose to run an aftermarket wideband gauge. Utilizes factory exhaust hangers. This system re-uses your factory Audi v-band turbo to downpipe clamp and cat-back exhaust clamps. Includes a new 3.5" Remflex graphite gasket along with new hardware to make the two downpipe halves together.

Features & Specs:
• Hand-Fabricated
• Tig Welded & Back Purged
• 3.5 inch to two 2.5 inch Stainless Steel (88.9mm to 50.8)
• Billet Stainless Steel V-Band Flange
• Three O2 Bungs
• Mates to Stock Turbo Outlet
• Gaskets & Hardware Included
• Utilizes Factory Exhaust Hangers
• Reuse Factory Audi V-Band Turbo Clamp
• Reuse Factory Audi Cat-Back Exhaust Clamps

STM Downpipe: 14 pounds
Stock Downpipe: 31 pounds
Weight Savings: 17 pounds!

(1) Two-Piece Downpipe
(2) M10 x 35 Bolts
(2) M10 Lock Washers
(2) M10 Nuts
(1) 2-Bolt 3.5" Remflex Gasket
(1) O2 Bung Plug

Made in the USA!
Lifetime Warranty on STM Parts to the original purchaser against manufacturing defects.

Race Use Only:
This exhaust component is for track-dedicated race cars only and may not be legal for street use. Please check all your local laws before purchase.

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