STM Audi RS3/TTRS Downpipe

The STM 2-Piece 3.5" Downpipe is an ideal upgrade for your RS3 or TTRS! Meticulously crafted in the USA, this stainless steel downpipe features a precision-machined billet V-band flange, ensuring a perfect fit with your factory turbo. Its full 3.5" construction seamlessly merges into two 2.5" outlets, allowing compatibility with your stock or factory-style cat-back exhaust.

Included are three oxygen sensor bungs for the factory front and rear sensors, as well as an additional bung for accommodating an aftermarket wideband gauge if desired. This downpipe utilizes factory exhaust hangers and re-uses your factory Audi V-band turbo-to-downpipe clamp and cat-back exhaust clamps. Each kit includes a new 3.5" Remflex graphite gasket along with new hardware to securely fasten the two downpipe halves together.

 
Vehicle Fitment: 
2017+ Audi RS3 
2018+ Audi TTRS 
 
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 
 
Weights: 
STM Downpipe: 14 pounds 
Stock Downpipe: 31 pounds 
Weight Savings: 17 pounds! 
 
Includes: 
(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. 
 
Install Notes: 
You will have to remove the factory transfer case heat shield. 
 
Shipping Times: 1-14 Days 
Hand crafted and welded in New York, please give our fabricators time to assemble your piece!