SKU: 4585732500

XForce | 4" to 3" Turbo Downpipe & High-Flow Cat | Audi RS3 8V & TT RS FV | ESRS317KITB

Sale price$546.75 Regular price$607.50
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Ships within 48 hours · Estimated delivery Jul 17 - Jul 22

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Description

XForce | 4" to 3" Turbo Downpipe & High-Flow Cat | Audi RS3 8V & TT RS FV | ESRS317KITBXForce 4" to 3" Turbo Downpipe & High Flow Cat Kit Audi RS3 8V & TT RS FV ESRS317KITB Unlock the full potential of your 2. 5L TFSI engine with the XForce Turbo Downpipe kit for the Audi RS3 (8V) and TT RS (FV). This premium upgrade is designed to maximize exhaust flow by replacing the highly restrictive factory component. Crafted from high quality 304 stainless steel, the system features a massive 4" inlet that transitions smoothly into 3" mandrel

XForce 4" to 3" Turbo Downpipe & High-Flow Cat Kit - Audi RS3 8V & TT RS FV - ESRS317KITB

Unlock the full potential of your 2.5L TFSI engine with the XForce Turbo Downpipe kit for the Audi RS3 (8V) and TT RS (FV). This premium upgrade is designed to maximize exhaust flow by replacing the highly restrictive factory component. Crafted from high-quality 304 stainless steel, the system features a massive 4" inlet that transitions smoothly into 3" mandrel-bent tubing. By deleting the secondary catalytic converters and utilizing a 200-cell high-flow metallic race cat, this kit significantly reduces backpressure, resulting in improved throttle response, increased horsepower, and a much more aggressive, visceral exhaust note.

What's in the Box?

  • 1x 4" to 3" 304 Stainless Steel Turbo Downpipe
  • 1x 200-Cell Metallic High-Flow Race Catalytic Converter
  • 1x Secondary Cat Delete Tuning Pipe
  • 1x 3" to Twin OEM-Size Adaptor Pipe
  • Stainless Steel Flex Bellows (Integrated)
  • Full Fitting Kit (Gaskets & Hardware)

Features:

This product offers the following high-performance features:

  • Precision Engineering: Features a massive 4" inlet tapering to 3" for optimal exhaust gas velocity and reduced turbo lag.
  • High-Flow Metallic Race Cat: Includes a 200-cell metallic substrate catalytic converter designed for maximum flow and durability under high-heat conditions.
  • 304 Stainless Steel Construction: Manufactured from non-polished 304-grade stainless steel for superior longevity and corrosion resistance.
  • Secondary Cat Delete: Replaces restrictive secondary cats with a tuning pipe to ensure unrestricted power delivery.
  • Direct Replacement: Designed as a bolt-on replacement for the factory downpipe; no cutting or welding is required for installation.
  • Versatile Adaptability: Supplied with a 3" to twin OEM-size adaptor pipe to allow fitment to both factory and aftermarket exhaust systems.

Specifications:

  • Make: Audi
  • Model: RS3 (8V) / TT RS (FV)
  • Year Range: 2017–Current
  • Material: 304 Stainless Steel (Non-Polished)
  • Pipe Size: 4" Tapering to 3"
  • Cat Type: 200-Cell High-Flow Metallic Race Cat

Important Information

  • The image shown may not reflect the actual product
  • Shipping times may vary depending on destination and stock availability
  • Note: An ECU Tune is highly recommended after installation to maximize performance gains and prevent Check Engine Lights (CEL) due to the cat delete.

Vehicle Applications:

Vehicle Applications for ESRS317KITB
Make Model From To Body Series Engine Variant Drivetrain
AUDI
AUDI RS3 2017 - Sedan / Sportback 8V 2.5L TFSI I5 Turbo RS3 Quattro AWD
AUDI TT RS 2017 - Coupe / Roadster FV (8S) 2.5L TFSI I5 Turbo TT RS Quattro AWD

 

Warranty Information
Product Type Warranty Period
304 & 201 Stainless Steel Exhaust Systems 60 Months
Accessories 12 Months
Catalytic Converters 12 Months
Electronic Products (Including SmartBox) 12 Months
Mild Steel & 409 Stainless Steel Exhaust Systems 24 Months
Mild Steel Headers 12 Months
Stainless Steel Headers 24 Months
Universal 304 Stainless Steel Mufflers 24 Months
Universal Mild Steel & 409 Stainless Steel Mufflers 12 Months

Payment & Security:
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

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: 4585732500

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4.4 ★★★★★
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Paige
West Palm Beach, US
★★★★★ 5
Definitely worth the price
Size: 6.5, Color: Black/Black
Absolutely love these boots! I originally bought them to wear in NYC in December & they did not disappoint. They were comfortable, cute, durable and worked well in the slush/snow. The traction on the bottom is also nice! They kept me warm with wool socks. I wear them almost daily now. Perfect for everyday. easy to wear with variety of outfits. Good every day shoe.
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Reviewed in the United States on January 3, 2026
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Kimberly
Los Angeles, US
★★★★★ 5
Snagged a deal
Size: 7, Color: Redwood/Gum 10
I waited and waited to get these boots! I knew I was chancing it, but they went on sale, and I snagged them! I am a size 7, and they fit nicely with socks. a little loose, barefooted, but what psycho wears boots without socks? They are comfortable and really well-made.
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Reviewed in the United States on April 8, 2026
A
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ashlynnk
Grantham, US
★★★★★ 4
Cute, comfortable waterproof boots (a little snug to put on)
Size: 7, Color: Velvet Tan/Gum 2
These are really cute Chelsea-style boots and feel very comfortable once they’re on. The waterproof material is great for wet weather and the sole feels sturdy with good traction. They look stylish enough to wear casually but still feel practical for rainy days. The only downside is they can be a little difficult to put on at first because the opening is somewhat snug, but once they’re on they fit well and feel supportive. Overall they’re a great waterproof boot and I’ve enjoyed wearing them.
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Reviewed in the United States on March 17, 2026
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Verified Purchase
Abby B
Bozeman, US
★★★★★ 5
Surprisingly great for my wide feet and high instep!
Size: 10.5, Color: Velvet Tan/Gum 2
So thrilled I took a chance on these. Finding boots is impossible for me. I have wide feet, a super high instep, a bunion on one foot, and I wear a hard to find size (10.5). I ordered the 10.5 and 11 in these expecting I might need to size up for width (if I could even get them on). It was a struggle getting the 10.5s on the first time, and once I did they were somewhat uncomfortable on the top of my left foot. But I read that they would relax so decided to give it a go because I need waterproof boots for an upcoming trip and the 11s felt too long. After two days of light wear, they are already breaking in and I have no more discomfort. Getting them on is already easier and they are plenty wide enough and very comfortable to walk in. These are true to size. Super happy and worth a day of mild discomfort to break them in!
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Reviewed in the United States on March 7, 2026
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EE
Lake Worth, US
★★★★★ 5
Comfortable, sturdy, waterproof
Size: 9.5, Color: Black/Black
Loce, love, love these boots. Have walked ten miles with no foot pain around NYC. They go with everything and and are so comfortable. As they are waterproof/resistant, they get a little warm in high temps, but perfect three-season boots.
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Reviewed in the United States on May 17, 2026

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