SKU: 85494496369

FI Exhaust Valvetronic Cat-Back System For Audi S4 / S5 (B9) 2018-2024

Sale price$1687.50 Regular price$1875.00
Save 10%

Pay in installments of $468.75 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 20 - Jul 25

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

FI Exhaust Valvetronic Cat-Back System For Audi S4 / S5 (B9) 2018-2024Audi B9 S4 Fi Exhaust (Frequency Intelligent Exhaust) high performance valvetronic exhaust system is direct replacement bolt on system manufactured out of a high grade T304 stainless steel that offers an exhilarating soundtrack. The Fi EXHAUST system is designed with a valvetronic technology to control airflow, sound volume and enhance the overall performance and torque. On average horsepower is expected to increase from 5 10% after installing a full

Audi B9 S4 Fi Exhaust (Frequency Intelligent Exhaust) high-performance valvetronic exhaust system is direct replacement bolt on system manufactured out of a high-grade T304 stainless steel that offers an exhilarating soundtrack.

The Fi EXHAUST system is designed with a valvetronic technology to control airflow, sound volume and enhance the overall performance and torque. On average horsepower is expected to increase from 5-10% after installing a full catless system, which includes a valvetronic catback and ultra-high flow downpipe.

When valves are closed exhaust gasses are routed through the muffler resulting in a low-profile comfortable drive. However, when the valves are fully open an intense and sporty soundtrack is produced.

Depending on your car model and exhaust setup, switching exhaust valves between street and race modes may be achieved using a factory exhaust/sport button, drive modes, or by selecting the Fi Pro remote control upgrade. Please note that not all options are available for every model. Refer to the available section and contact our representative for confirmation.

The unique sound and performance for Audi B9 S4 is achieved through individually designed muffler internals that are fabricated to offer an ultimate driving experience.

Please note each part of the Fi EXHAUST system needs to be ordered separately.
Different exhaust parts are offered depending on the vehicle version.

Please note that the actual product may vary in appearance depending on the year of the car and area. The exhaust system is also subject to changes to the design over an extended time period. Product pictures are for illustration purposes only.


Catback Exhaust:
Front Pipe + Mid X-Pipe + Valvetronic Muffler + Quad Silver Tips + Standard remote control system module (AD-S4B9-CBV + TIP6389S*4 + R2016OL + OBD-CAB-V)

Downpipes (Optional):
1.Ultra High Flow DownPipe (AD-S4B9-NCAT)
2.Sport 200 cell DownPipe (AD-S4B9-CAT200)

Tips (Optional):
1.Quad Tips in Titanium Blue (TIP6389TB*4)
2.Quad Tips in Diamond Black (TIP6389B*4)
3.Quad Tips in Gold (TIP6389G*4)
4.Quad Tips with Carbon Fiber (TIP6389C*4)

Fi EXHAUST Pro Remote Control System (Optional):
OBD2/Mobile APP Remote Control System Module (R2020OBD)

 

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: 85494496369

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.5 ★★★★★
Based on 12 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
J
Verified Purchase
J
Cuba, US
★★★★★ 5
Exactly as expected
Color: Black, Size: Medium (8.5-14''W x 12''D), Color: Black, Size: Medium (8.5-14''W x 12''D)
This expandable silverware organizer made such a difference in my kitchen drawers. It sounds dramatic for a utensil organizer, but it genuinely made everything feel cleaner, more organized, and less chaotic. I love that it expands because it made it super easy to customize to my drawer size instead of awkwardly leaving unused space. The compartments are roomy enough to hold a lot without everything getting jumbled together, and I like that there are enough sections for silverware plus extra kitchen tools and gadgets. It helped me finally give everything a designated place, which is especially satisfying when setting up a new kitchen. Even though it’s plastic, it doesn’t feel flimsy or cheap. It feels sturdy once in the drawer, slides open smoothly, and has held up really well with daily use. I also appreciate that it’s lightweight and easy to wipe clean if crumbs or dust get inside. Overall, this is one of those simple organizational purchases that makes everyday life easier. My kitchen drawers look so much more put together now, and it’s nice not having to dig through clutter every time I need a fork or cooking utensil. Definitely worth it for anyone trying to organize their kitchen without spending a ton.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
J
Verified Purchase
judy knapp
Natrona Heights, US
★★★★★ 5
Expandable drawer organizer
Color: Gray, Size: XL (13-22''W x 15''D)
Wonderful addition to the silverware drawer. It expands to fit the size of your drawer. It is well designed and well made. We are very pleased!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
C
Verified Purchase
christine
Grantham, US
★★★★★ 5
Worth the money
Color: Black, Size: Medium (8.5-14''W x 12''D)
Made well and fits nicely is drawer
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
S
Verified Purchase
Shivani
Whiting, US
★★★★★ 5
Excellent Quality Bamboo Cutting Board Set – Durable, Beautiful & Practical!
Color: Carbonized, Size: 3-piece
I’m very impressed with this 3-piece bamboo cutting board set! The different sizes are perfect for all my kitchen needs, from chopping vegetables and fruits to preparing meat and serving cheese. The bamboo is sturdy, smooth, and feels very high quality. I love the deep juice grooves, which help keep my countertops clean when cutting juicy fruits or meats. The boards arrived well-finished and pre-oiled, and they have held up beautifully without cracking or warping. They are lightweight enough to handle easily but still solid and durable. The natural bamboo look adds a nice touch to my kitchen, and cleaning them is quick and simple. Overall, this is an excellent value for the quality and versatility you get. Highly recommend to anyone looking for reliable, attractive cutting boards!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 8, 2026
H
Verified Purchase
H Salib
New York, US
★★★★★ 5
Excellent Value.
Color: Carbonized, Size: 3-piece
These cutting boards are well made, sturdy, and look great in the kitchen. The three sizes are very practical, and the price makes this set an excellent value.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026

recommand products