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Audi S4 Most Popular Parts

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APR Ultralink At-Home Tuning Cable

ES#4759009 - EM100040 - APR Ultralink At-Home Tuning Cable - Tuning your vehicle with APR Software has never been easier thanks to the APR Ultralink! - APR - Audi Volkswagen Porsche

Tuning your vehicle with APR Software has never been easier thanks to the APR Ultralink! Call In Or Chat For Best Price! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!
Only available for purchase in the United States and Canada.

Brand:
APR - Corporate Logo
ES#:
4759009
Mfg#:
EM100040
In Stock
$139.95 USD
Free Shipping

Audi B8.5 S4/S5 Facelift Luft-Technik Performance Supercharger Intercooler Kit

ES#3569215 - 025496ecs01KT - Audi B8.5 S4/S5 Facelift Luft-Technik Performance Supercharger Intercooler Kit - Reduce restrictions and increase cooling! Whether you call it an intercooler, a heat exchanger, a radiator, or something else - this is the product for you. - ECS - Audi

Reduce restrictions and increase cooling! Whether you call it an intercooler, a heat exchanger, a radiator, or something else - this is the product for you. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Fits B8.5 Facelift Models

Brand:
ECS - Corporate Logo
ES#:
3569215
Mfg#:
025496ECS01KT
In Stock
ON SALE! SAVE 16%
$889.99

This product was last offered at the strikethrough price on
05-02-2026

$749.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

8-Speed Automatic Transmission Service Kit

ES#4381725 - 0d53980091KT - 8-Speed Automatic Transmission Service Kit - Includes a new transmission filter, Liqui Moly fluid, gaskets, and plugs to service your transmission - Assembled By ECS - Audi

Includes a new transmission filter, Liqui Moly fluid, gaskets, and plugs to service your transmission affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4381725
Mfg#:
0D53980091KT
In Stock
ON SALE! SAVE 19%
$261.99

This product was last offered at the strikethrough price on
05-02-2026

$212.35 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

3.0T Valve Cover Upgrade Kit With Gaskets and Hardware - Red

ES#4830382 - 06e1034712KT - 3.0T Valve Cover Upgrade Kit With Gaskets and Hardware - Red - Coming in a gloss red finish, these valve covers are a cost effective and aesthetic upgrade perfect for every 3.0T owner! - Bremmen Parts - Audi

Coming in a gloss red finish, these valve covers are a cost effective and aesthetic upgrade perfect for every 3.0T owner! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4830382
Mfg#:
06E1034712KT
In Stock
ON SALE! SAVE 20%
$399.99

This product was last offered at the strikethrough price on
05-02-2026

$319.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Dynamic+ End User Flashing Kit R4 (Flashing Device Only - Tuning Not Included)

ES#4684889 - 034-103-3306 - Dynamic+ End User Flashing Kit R4 (Flashing Device Only - Tuning Not Included) - End User Flashing allows Dynamic+ Performance Software customers to receive and install software updates and revisions, flash back to stock, or upgrade to the next stage of performance software for their vehicle. - 034Motorsport - Audi Volkswagen

End User Flashing allows Dynamic+ Performance Software customers to receive and install software updates and revisions, flash back to stock, or upgrade to the next stage of performance software for their vehicle. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
The 034SPI Mobile App is only available on vehicles with Dynamic+ Tuning installed. You must purchase Dynamic+ Tuning for your Audi or Volkswagen to access the Dynamic+ Flashing Suite and 034SPI Mobile Application.

Brand:
034Motorsport - Corporate Logo
ES#:
4684889
Mfg#:
034-103-3306
EO#:
D-850
In Stock
$180.00 USD
Free Shipping

AWE Resonated Downpipes - Audi B8/B8.5 3.0T

ES#4043933 - 3215-11030 - AWE Resonated Downpipes - Audi B8/B8.5 3.0T - Features resonators larger than the stock units in order to produce a more mellow sound volume. - AWE - Audi

Features resonators larger than the stock units in order to produce a more mellow sound volume. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
AWE - Corporate Logo
ES#:
4043933
Mfg#:
3215-11030
In Stock
15% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$1229.99

This product was last offered at the strikethrough price on
06-06-2026

$1045.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Billet Aluminum Transmission Mount Insert

ES#3176060 - 034-509-4053 - Billet Aluminum Transmission Mount Insert - This billet aluminum insert is designed to fill the large void in the factory transmission mount - 034Motorsport - Audi

This billet aluminum insert is designed to fill the large void in the factory transmission mount affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3176060
Mfg#:
034-509-4053
In Stock
$91.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS Performance Ignition Service Kit

ES#4686058 - 002540LCA07KT - ECS Performance Ignition Service Kit - Includes six Red ECS coil packs and OEM spark plugs to service your ignition system - Assembled By ECS - Audi

Includes six Red ECS coil packs and OEM spark plugs to service your ignition system affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4686058
Mfg#:
002540LCA07KT
In Stock
ON SALE! SAVE 14%
$361.99

This product was last offered at the strikethrough price on
05-02-2026

$312.32 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

B8 S4/S5/Q5 3.0T Downpipes With Resonator Deletes

ES#4714616 - 012616LA01-01KT - B8 S4/S5/Q5 3.0T Downpipes With Resonator Deletes - Change the tone of your 3.0T exhaust with easy-to-install downpipes that mate to your factory cat-back exhaust. - ECS - Audi

Change the tone of your 3.0T exhaust with easy-to-install downpipes that mate to your factory cat-back exhaust. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4714616
Mfg#:
012616LA01-01KT
In Stock
ON SALE!
$549.99

This product was last offered at the strikethrough price on
05-02-2026

$499.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Street Density Line Motor Mount Kit - 60 Durometer

ES#4619953 - 034-509-5041 - Street Density Line Motor Mount Kit - 60 Durometer - Void-free and fluid-free, eliminating the slop associated with the factory mounts - 034Motorsport - Audi

Void-free and fluid-free, eliminating the slop associated with the factory mounts affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
4619953
Mfg#:
034-509-5041
In Stock
$480.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

CTS Turbo B9 S4/S5 High Flow Cat

ES#4043052 - CTS-EXH-TP-0009C - CTS Turbo B9 S4/S5 High Flow Cat - CTS Turbo high flow cat is made to maximize exhaust flow for highest power gains - Do not compromise performance and sound with factory parts - Unleash your B9 S4/S5 3.0T Potential! - CTS - Audi

CTS Turbo high flow cat is made to maximize exhaust flow for highest power gains - Do not compromise performance and sound with factory parts - Unleash your B9 S4/S5 3.0T Potential! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
CTS - Corporate Logo
ES#:
4043052
Mfg#:
CTS-EXH-TP-0009C
Back Ordered
Auto Notify
$699.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Wireless CarPlay/Android Auto Retrofit Module

ES#4493822 - 001954LA01-04 - Wireless CarPlay/Android Auto Retrofit Module - Plug & Play interface to add Apple CarPlay and Android Auto to your factory infotainment system - Bremmen Parts - Audi

Plug & Play interface to add Apple CarPlay and Android Auto to your factory infotainment system affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

For vehicles with MMI+ only. (Buttons on center console instead of dashboard). Vehicles up through the 2013 model year without Bluetooth streaming audio require an AMI cable to be plugged in to receive sound (not included).

Brand:
Bremmen Parts - Corporate Logo
ES#:
4493822
Mfg#:
001954LA01-04
In Stock
ON SALE!
$363.99

This product was last offered at the strikethrough price on
05-02-2026

$344.95 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Audi B8 S4 / A4 S-Line Rear Diffuser - Gloss Black

ES#4033487 - 028808ECS01 - Audi B8 S4 / A4 S-Line Rear Diffuser - Gloss Black - Add some aggressive styling to your Audi! - ECS - Audi

Add some aggressive styling to your Audi! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Fits pre-facelift B8 models only

Brand:
ECS - Corporate Logo
ES#:
4033487
Mfg#:
028808ECS01
In Stock
ON SALE! SAVE 20%
$411.99

This product was last offered at the strikethrough price on
05-02-2026

$329.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Wheel Bearing Kit - Pair

ES#2918988 - 4H0498625AKT - Wheel Bearing Kit - Pair - Includes both bearings with axle & securing bolts - FAG - Audi
ECS Tuning recommends this product.

Includes both bearings with axle & securing bolts affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
FAG - Corporate Logo
ES#:
2918988
Mfg#:
4H0498625AKT
Ships in 1 Business Day
$300.99

This product was last offered at the strikethrough price on
06-04-2026

$237.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Density Line Front Upper Control Arm Kit

ES#3199968 - 034-401-1042 - Density Line Front Upper Control Arm Kit - Refresh your front end with 034Motorsport's front upper control arm kit - 034Motorsport - Audi Porsche

Refresh your front end with 034Motorsport's front upper control arm kit affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3199968
Mfg#:
034-401-1042
In Stock
$337.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Water Pump

ES#4220539 - 06E121018K - Water Pump - New water pump with coolant housing, does not include pulley - Graf - Audi Volkswagen

New water pump with coolant housing, does not include pulley affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits from the 2013 model year (facelift)

Brand:
Graf - Corporate Logo
ES#:
4220539
Mfg#:
06E121018K
In Stock
$200.99

This product was last offered at the strikethrough price on
05-07-2026

$187.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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