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Audi S4 Most Popular Parts

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Transmission Mount Insert

ES#2864605 - 034-509-4014 - Transmission Mount Insert - This billet aluminum insert is designed to fill the large void in the factory transmission mount - 034Motorsport - Audi Porsche

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#:
2864605
Mfg#:
034-509-4014
In Stock
$89.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Build Your Own Audi B8/8.5 S4 3.0T Valved Cat Back Exhaust System - Titanium

ES#4759973 - 008553ECS03 - Build Your Own Audi B8/8.5 S4 3.0T Valved Cat Back Exhaust System - Titanium - Experience your driving passion with our ECS Valved Exhaust System and control your sound with our valved muffler design - ECS - Audi

Experience your driving passion with our ECS Valved Exhaust System and control your sound with our valved muffler design affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4759973
Mfg#:
008553ECS03
In Stock
ON SALE!
Starting at $3581.94 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rear Differential Service Kit

ES#4620164 - g055190a2KT - Rear Differential Service Kit - Complete kit with Genuine fluids and drain plugs to service your rear differential - Genuine Volkswagen Audi - Audi

Complete kit with Genuine fluids and drain plugs to service your rear differential affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4620164
Mfg#:
G055190A2KT
In Stock
$100.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Audi B8 3.0T Supercharger Coolant Bleeder Bolt Set

ES#4305163 - 025670ecs01 - Audi B8 3.0T Supercharger Coolant Bleeder Bolt Set - Get rid of the plastic bleeder bolts on the back of the supercharger! - ECS - Audi

Get rid of the plastic bleeder bolts on the back of the supercharger! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4305163
Mfg#:
025670ECS01
In Stock
ON SALE! SAVE 25%
$52.99

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

$39.74 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Water Pump

ES#3679588 - 06E121018K - Water Pump - New water pump with coolant housing, does not include pulley - Genuine Volkswagen Audi - 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:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3679588
Mfg#:
06E121018K
In Stock
14% off MSRP

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

$311.67

This product was last offered at the strikethrough price on
06-08-2026

$269.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Audi B8.5 S4 Facelift Rear Diffuser & Trunk Spoiler

ES#4751213 - 026861ECS01EBKT - Audi B8.5 S4 Facelift Rear Diffuser & Trunk Spoiler - Add some aggressive styling to your Audi! - Enthusiast Bundles - Audi

Add some aggressive styling to your Audi! Don't See A Bundle You Want - Give Us A Call Or Chat - We Will Make One! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits facelift B8.5 (2013+) models only

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4751213
Mfg#:
026861ECS01EBKT
In Stock
ON SALE! SAVE 49%
$785.48

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

$399.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

18" Style 040 Wheels - Set Of Four

ES#2738548 - 040-4kt - 18" Style 040 Wheels - Set Of Four - 18x8.5" ET40 5x112 57.1CB - Silver/Machined Face - Alzor - Audi Volkswagen

18x8.5" ET40 5x112 57.1CB - Silver/Machined Face affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Alzor - Corporate Logo
ES#:
2738548
Mfg#:
040-4KT
In Stock
ON SALE! SAVE 25%
$1176.99

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

$882.51 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Unitronic Intercooler Upgrade 3.0TFSI B9 S4/S5

ES#4362352 - UH017-ICA - Unitronic Intercooler Upgrade 3.0TFSI B9 S4/S5 - Direct OEM replacement kit featuring an over-sized bar and plate intercooler core made from cast aluminum core and end tanks, proprietary internal fin and louver configuration, and 79% more volume than OEM! - Unitronic - Audi

Direct OEM replacement kit featuring an over-sized bar and plate intercooler core made from cast aluminum core and end tanks, proprietary internal fin and louver configuration, and 79% more volume than OEM! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Unitronic - Corporate Logo
ES#:
4362352
Mfg#:
UH017-ICA
Ships in 2 Business Days
$949.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front Brake Rotors - Pair (350x34)

ES#4067197 - 4M0615301ANKT2 - Front Brake Rotors - Pair (350x34) - Restore the stopping power in your vehicle - Zimmermann - Audi

Restore the stopping power in your vehicle affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Zimmermann - Corporate Logo
ES#:
4067197
Mfg#:
4M0615301ANKT2
In Stock
$404.99

This product was last offered at the strikethrough price on
01-07-2026

$241.98 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B5 A4/S4 Solo-Werks S1 Coilovers

ES#2777310 - s1au004 - Audi B5 A4/S4 Solo-Werks S1 Coilovers - Set your vehicle low and tight for optimal performance - Solo-Werks - Audi

Set your vehicle low and tight for optimal performance affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Lowering front: 1.5" - 3", rear: 1.5" - 3"

Brand:
Solo-Werks - Corporate Logo
ES#:
2777310
Mfg#:
S1AU004
In Stock
$649.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

CTS Air-to-Water Intercooler Upgrade

ES#3617892 - CTS-B8S4-AWIC - CTS Air-to-Water Intercooler Upgrade - Complete replacement for restrictive factory cooler - Reduces intake and coolant temps while maintaining consistent power in extreme conditions! - CTS - Audi

Complete replacement for restrictive factory cooler - Reduces intake and coolant temps while maintaining consistent power in extreme conditions! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
*Fits models without adaptive suspension*

Brand:
CTS - Corporate Logo
ES#:
3617892
Mfg#:
CTS-B8S4-AWIC
Back Ordered
Auto Notify
$559.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Fuel Injector Seal Kit - Priced Each

ES#4708484 - 06E998907E - Fuel Injector Seal Kit - Priced Each - One kit services one injector - Elring - Audi

One kit services one injector affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Elring - Corporate Logo
ES#:
4708484
Mfg#:
06E998907E
In Stock
$13.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Audi B8 A4/S4 Facelift Carbon Fiber Radiator Support Cover

ES#3435250 - 024714ECS01 - Audi B8 A4/S4 Facelift Carbon Fiber Radiator Support Cover - Carbon fiber, front and center! - ECS - Audi

Carbon fiber, front and center! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Fits Facelift models from the 2013 model year

Brand:
ECS - Corporate Logo
ES#:
3435250
Mfg#:
024714ECS01
Ships on Jul 22, 2026
Auto Notify
ON SALE! SAVE 15%
$410.99

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

$349.32 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Flywheel

ES#2731933 - 0B4105266G - Flywheel - Does not include hardware - LUK - Audi

Does not include hardware affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!
Manual transmission only

Brand:
LUK - Corporate Logo
ES#:
2731933
Mfg#:
0B4105266G
Ships in 1 Business Day
$1222.58 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Stage 3+ Clutch Kit

ES#2778072 - SA303F-3 - Stage 3+ Clutch Kit - Full faced carbon semi-metallic disc with a torque rating of 595ft/lbs - Spec Clutches - Audi

Full faced carbon semi-metallic disc with a torque rating of 595ft/lbs affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Spec Clutches - Corporate Logo
ES#:
2778072
Mfg#:
SA303F-3
In Stock
$1109.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Basic Oil Separator/Pressure Control Valve (PCV) Service Kit

ES#4781296 - 06M103515HKT - Basic Oil Separator/Pressure Control Valve (PCV) Service Kit - Replace your leaking PCV - Assembled By ECS - Audi Porsche

Replace your leaking PCV 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#:
4781296
Mfg#:
06M103515HKT
In Stock
ON SALE! SAVE 18%
$132.99

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

$108.78 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

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