FI Exhaust Valvetronic Cat-Back System For Audi S4 / S5 (B9) 2018-2024
SKU: 76424379621

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

Sale price$1687.50 Regular price$1875.00
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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: 76424379621

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Harry Baldwin
Carnegie, US
★★★★★ 5
Best miscellaneous wipe for the money
Scent: Unscented, Size: 25 Count (Pack of 4)
Excellent micellar wipe. Best value for the money.
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Reviewed in the United States on January 16, 2026
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DezzleBee
San Leandro, US
★★★★★ 4
Great, but different.
Scent: Unscented, Size: 25 Count (Pack of 4)
I've been buying these for a while now. I love them because I have really sensitive skin and these clean my face without leaving a greasy film, or irritating my skin like other face wipes do. Mind you, the only makeup I wear is mascara though, so it's really only cleaning off oil and dirt. They don't dry out my face either. The only problem I have with these, is that, the last batch I ordered (while in the same packaging, and having no difference in looks or labels) is different than what I had previously been receiving from the same company. They smell different (actually better in my opinion) and they do NOT remove my mascara as well anymore. I still love them, because it does help keep my face from being excessively oily and keeps it clean other than removing my mascara. Though I am disappointed that I now have to get a different brand wipe just for removing my mascara now.
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Reviewed in the United States on March 8, 2020
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Susanna Heimann
San Leandro, US
★★★★★ 5
Best of the facial wipes
Scent: Unscented, Size: 25 Count (Pack of 3)
I have used a lot of facial wipes. But, because of environmental reasons I am trying to cut back on the excess use of wipes which will go into a landfill. However, there are times when I am just too tired or too lazy to do a whole cleansing routine at night and I will reach for a wipe. These do a good job of taking off even waterproof makeup and yet still being gentle on the skin. I find I have no sensitivity to them(and I am sensitive to many, many things). I bought them specifically this time for my trip to Thailand because I knew it would be hot and humid and that I probably would need to cleanse my face a couple of times during the day from sweat and grime. They worked and I found them refreshing. I think I will always keep them on hand for the times I need them — this is by far my favorite brand.
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DL Frazelle
Grantham, US
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Great for Rosacea Skincare
Scent: Unscented, Size: 25 Count (Pack of 6)
My elderly mom has rosacea and these moist Micellar Facial Wipes are the absolute best for cleaning her delicate skin. I was so happy to discover Simple Facial Wipes because I had tried many other brands in the past, but all of the other wipes irritated her face and caused a burning sensation. These wipes are soft, sturdy and unscented. They are also pricier than other brands, but they are well worth the cost.
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Amazon Customer
Omaha, US
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Best wipes at a great price!
Scent: Unscented, Size: 25 Count (Pack of 6)
These are about the best facial cleansing wipes I've found anywhere, and if you buy the bundle it's a great bargain as well. The wipes are gentle on my sensitive skin, but do a thorough job of getting off the makeup, even mascara and eyeliner. My husband was shaking an ink cartridge the other day and black ink sprayed out all over his face and shirt. On impulse we grabbed one of my facial wipes and started to clean the ink off his face. It easily cleaned up all of the ink, even from his mustache and beard with no residue, and I only had to use two of them. That's how effective these wipes are!
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Reviewed in the United States on April 23, 2020

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