IE 3.5" Catted Downpipe - Audi | RS3 | TT-RS | 2.5T
SKU: 84845389550

IE 3.5" Catted Downpipe - Audi | RS3 | TT-RS | 2.5T

Sale price$836.55 Regular price$929.50
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

IE 3.5" Catted Downpipe - Audi | RS3 | TT-RS | 2.5TY Pipe is sold Separately READY TO UNLOCK STAGE 2 ON YOUR 2. 5T? Your Audi RS3 or TTRS is a sporty fun drive straight from the factory, however, there is a lot of power hiding just inches from your right foot. You may already have a Stage 1 Tune, but you're ready to feel the complete performance potential from your powerful 2. 5T engine. Adding the IE downpipe is the key to unlocking Stage 2 horsepower and fully releasing that RS beast! FEATURES:

Y-Pipe is sold Separately

READY TO UNLOCK STAGE 2 ON YOUR 2.5T?

Your Audi RS3 or TTRS is a sporty fun drive straight from the factory, however, there is a lot of power hiding just inches from your right foot. You may already have a Stage 1 Tune, but you're ready to feel the complete performance potential from your powerful 2.5T engine. Adding the IE downpipe is the key to unlocking Stage 2 horsepower and fully releasing that RS beast!

FEATURES:

  • Massive horsepower & torque gains
  • 3.5" inch tubing replaces the restrictive factory size
  • Bolt on fitment - no hassle or poorly fitting parts when you choose IE
  • Cast downpipe sections - exact fit & ultimate flow
  • Constructed of 304 stainless piping - long-lasting and high-quality material
  • Thick turbo flange - prevents leaks and warping
  • High flow 200 cell catalytic converter - full power with reduced pollution and smell
  • High-quality flex section - allows for more adjustment and won’t fail
  • All inclusive kit - downpipe, mid pipes, all hardware
  • TIG welded construction - equates to long-lasting welds that are less likely to fail

STOCK DOWNPIPES ROB HORSEPOWER

Your 2.5T engine is capable of supercar level horsepower on the stock engine and turbo reliably with a Stage 2 Tune alone! However, the factory installed downpipe is designed for maximum emissions and economy, not for power. This design is riddled with small piping, harsh bends, and power sucking restrictions that limit your power gains to only Stage 1 Tune levels. In order to correct that, a true performance downpipe is required to open up the exhaust flow and allow the turbo to spin freely!

MAXIMUM FLOW DOWNPIPE

IE engineers set out to design the ultimate downpipe option for the 8V RS3 and 8S TTRS chassis by employing leading-edge development technology along with highly specialized cast manufacturing. By using cast sections this allowed our engineers to design specialized shapes into the downpipe itself that lets it conform and fit into very tight spaces while retaining it's large size and maximized flow rates. The design is so specialized that 3D scanning was used to build a digital model of the chassis to design in allowing us to build shapes down to the millimeter. This design is just not possible using traditional stainless steel pipes and bends found in most exhaust manufacturing.

POWER GAINS

Bolting this downpipe onto your Audi along with other matching bolt-ons and an IE Stage 2 Tune results in up to 577 horsepower! You can take your RS3 or TTRS from a sporty driver to a power monster in a single weekend. Downpipe requires Stage 2 Tune for complete installation.

LET THAT 5 CYLINDER SING!

Your RS 2.5 TFSI engine has an amazing 5 cylinder sound that all enthusiasts love. Unfortunately, much of that sound is muffled by the factory downpipe system. The cast design of your IE downpipe creates an aggressive and deep tuned sound that showcases the unique rumble from the 5 cylinder turbo engine. It remains perfectly daily drivable and modest on your daily commute, but when you put the pedal down it transforms into an all-out howling beast!

REMOVABLE HIGH FLOW CATALYTIC CONVERTER

By employing a high flow metal matrix catalytic converter, horsepower loss is almost non-existent while keeping unpleasant smells and increased emissions to a minimum. However, the CAT section can be completely removed and replaced with a straight exhaust pipe for track days or drag events if you wish.

LONG-LIFE MANUFACTURING

This downpipe holds the seal of IE quality and has been manufactured to last as long as you own the vehicle and beyond. Constructed from 304 stainless steel and expertly tig welded for incredible reliability. The cast and CNC machined turbo flange is thick to prevent leaks or warping at the turbo while a quality flex section works to allow normal movement between the chassis and engine without adding strain to the downpipe.

INSTALLATION

This downpipe kit includes everything needed to bolt-on directly with no permanent modifications or alterations to the vehicle. The removal of the factory downpipe is a very long process and is only recommended to be performed by a professional. DIY is not recommended for most on this product. CLICK HERE to view and download a step-by-step install guide (coming soon).

About Integrated Engineering: Merging decades of experience with hundreds of hours of prototyping, engineering, dyno testing and daily usage evaluation has output exhaust systems that are the ultimate compliment to your performance car. IE products are proudly engineered, designed, and manufactured in-house, in Salt Lake City USA.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 84845389550

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.8 ★★★★★
Based on 762 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
K
Verified Purchase
Kyoko Teshima
Alexandria, US
★★★★★ 1
Arrived used for the second time.
Size: 10 Little Kid, Color: Rose Glitter W/Strap
I love Melissa sandals. The product is good, but it arrived used for the second time. It is poor store management.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
P
Verified Purchase
Paniz Ameri
Louisville, US
★★★★★ 5
Super cute
Size: 7 Toddler, Color: Glitter Clear/Pink
Looks cute and smells good.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 4, 2026
K
Verified Purchase
Kristen M
Los Angeles, US
★★★★★ 5
Love these shoes!
Size: 9 Little Kid, Color: Rose Glitter W/Strap
My daughter loves these shoes! So comfy & easy to put on! They are even cuter in person!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 25, 2025
M
Verified Purchase
Melissa
Belleville, US
★★★★★ 5
Run small size up
Size: 10 Little Kid, Color: Rose Glitter W/Strap
Mini Melissa’s are my go to flats for my toddler they are so cute and flexible perfectly comfortable for her little feet.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 26, 2025
R
Verified Purchase
Rossana Crego
Massapequa, US
★★★★★ 1
Used shoes
Size: 10 Little Kid, Color: Glitter Clear W/Strap, Size: 10 Little Kid, Color: Glitter Clear W/Strap
If I could give this zero stars, I absolutely would. I ordered these shoes expecting them to be brand new since I paid full price and never selected any “used” option. What I received instead were clearly heavily worn shoes there were visible signs of use that you simply wouldn’t expect from a new product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 25, 2026

recommand products