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Audi S4 Most Popular Parts

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Super Sport Springs - Set

ES#1303564 - 50361-77 - Super Sport Springs - Set - Aggressive looks and ultimate handling. Average lowering of 2.0"F 2.0"R - H&R - Audi

Aggressive looks and ultimate handling. Average lowering of 2.0"F 2.0"R affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
H&R - Corporate Logo
ES#:
1303564
Mfg#:
50361-77
In Stock
$257.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Synthoil Premium Engine Oil (5w-40) - 5 Liter

ES#258725 - 2041 - Synthoil Premium Engine Oil (5w-40) - 5 Liter - A fully synthetic oil specifically designed around the unique needs and long drain intervals of European engines - Liqui-Moly - Audi BMW Volkswagen

A fully synthetic oil specifically designed around the unique needs and long drain intervals of European engines affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Liqui-Moly - Corporate Logo
ES#:
258725
Mfg#:
2041
In Stock
43% off MSRP

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

$81.95

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

$46.35 USD
Free Shipping
on orders $49 and up

Supercharger Intercooler Kit

ES#4475579 - 06e145621sKT - Supercharger Intercooler Kit - Everything needed to replace failed heat exchangers. - Assembled By ECS - Audi
ECS Tuning recommends this product.

Everything needed to replace failed heat exchangers. 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#:
4475579
Mfg#:
06E145621SKT
Ships in 2 Business Days
$1492.41 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

B9 A4 / S4 Lowering Spring Set

ES#4714528 - 051204LA01-A - B9 A4 / S4 Lowering Spring Set - Dramatically improve looks and handling with and average lowering up to 1.5" front and rear. - ECS - Audi

Dramatically improve looks and handling with and average lowering up to 1.5" front and rear. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4714528
Mfg#:
051204LA01-A
In Stock
ON SALE! SAVE 19%
$308.99

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

$250.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Liqui Moly Top Tec - Oil Service Kit (0w-20)

ES#4659470 - 202361KT - Liqui Moly Top Tec - Oil Service Kit (0w-20) - Includes LiquiMoly Top Tec 6200 508.00/509.00 0W20 oil, Genuine Audi Filter, drain plug, and washer for a complete oil service - Assembled By ECS - Audi

Includes LiquiMoly Top Tec 6200 508.00/509.00 0W20 oil, Genuine Audi Filter, drain plug, and washer for a complete oil service 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#:
4659470
Mfg#:
202361KT
In Stock
ON SALE!
$120.99

This product was last offered at the strikethrough price on
03-09-2026

$114.15 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

3.0T Billet Aluminum Thermostat - 80°C

ES#4876046 - 053120LA02 - 3.0T Billet Aluminum Thermostat - 80C - Ditch your failure-prone OE plastic thermostat with a high-performance, billet aluminum alternative! - ECS - Audi Volkswagen

Ditch your failure-prone OE plastic thermostat with a high-performance, billet aluminum alternative! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4876046
Mfg#:
053120LA02
In Stock
ON SALE! SAVE 12%
$397.99

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

$350.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B8 S4 / A4 S-Line Pre-Facelift Front Lip - Gloss Black

ES#4164865 - 028805ecs01KT - Audi B8 S4 / A4 S-Line Pre-Facelift Front Lip - Gloss Black - Upgrade your exterior styling! - ECS - Audi

Upgrade your exterior styling! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

For vehicles up to the 2012 model year (Pre-Facelift)

Brand:
ECS - Corporate Logo
ES#:
4164865
Mfg#:
028805ECS01KT
In Stock
ON SALE! SAVE 30%
$308.99

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

$216.29 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS Wheel Spacer & Bolt Kit - 15mm With Black Ball Seat Bolts

ES#2748193 - ECS10157KTWB1 - ECS Wheel Spacer & Bolt Kit - 15mm With Black Ball Seat Bolts - Includes everything you need to install spacers on two wheels - ECS - Audi Volkswagen

Includes everything you need to install spacers on two wheels affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Fits OEM wheels or wheels that require ball seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2748193
Mfg#:
ECS10157KTWB1
In Stock
ON SALE! SAVE 20%
$170.99

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

$136.79 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

3.0T 207mm Supercharger Crank Pulley Upgrade Kit

ES#4883431 - 053844la01KT - 3.0T 207mm Supercharger Crank Pulley Upgrade Kit - "Dual pulley" gains without the hassle! Easily increase supercharger RPM by 22% and support up to 550HP. - ECS - Audi Volkswagen Porsche

"Dual pulley" gains without the hassle! Easily increase supercharger RPM by 22% and support up to 550HP. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
For use with OEM (63.25mm) Supercharger Pulley.
"Stage 2" Software Required for Compatibility

Brand:
ECS - Corporate Logo
ES#:
4883431
Mfg#:
053844LA01KT
In Stock
ON SALE! SAVE 20%
$410.99

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

$328.79 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front & Rear Performance Brake Service Kit

ES#4475287 - 4M0615301AN5KT - Front & Rear Performance Brake Service Kit - Featuring Zimmermann Cross-Drilled rotors and ECS EP24 Performance Brake pads - Includes set screws, brake wear sensors, and silicone brake lubricant - Assembled By ECS - Audi

Featuring Zimmermann Cross-Drilled rotors and ECS EP24 Performance Brake pads - Includes set screws, brake wear sensors, and silicone brake lubricant 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#:
4475287
Mfg#:
4M0615301AN5KT
In Stock
ON SALE! SAVE 12%
$1173.99

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

$1037.76 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Performance High-Flow Air Intake System - 6" Velocity Stack

ES#4045629 - CTS-IT-290R - Performance High-Flow Air Intake System - 6" Velocity Stack - Designed to work in conjunction with the OEM air scoop to seamlessly force cold air into the system - Flowed through a massive 6" velocity stack filter! - CTS - Audi

Designed to work in conjunction with the OEM air scoop to seamlessly force cold air into the system - Flowed through a massive 6" velocity stack filter! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
CTS - Corporate Logo
ES#:
4045629
Mfg#:
CTS-IT-290R
Back Ordered
Auto Notify
$299.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front Aero Wiper Blade Set

ES#2739371 - 3397007297 - Front Aero Wiper Blade Set - Clear up streaks & improve rainy day visibility - Bosch - Audi Volkswagen Porsche
ECS Tuning recommends this product.

Clear up streaks & improve rainy day visibility affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
2739371
Mfg#:
3397007297
In Stock
$24.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 S4 Luft-Technik Intercooler and Charge Pipe Kit

ES#3639384 - 023880ecs01akt1 - Audi B9 S4 Luft-Technik Intercooler and Charge Pipe Kit - Full kit to upgrade your charge pipes and front mount intercooler - ECS - Audi

Full kit to upgrade your charge pipes and front mount intercooler affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3639384
Mfg#:
023880ECS01AKT1
Ships on Sep 23, 2026
Auto Notify
ON SALE! SAVE 25%
$999.99

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

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

ES#4488022 - 008553ECS01 - Build Your Own Audi B8/8.5 S4 3.0T Valved Cat Back Exhaust System - Stainless - 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!
10X Entries For Our Spin To Win Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4488022
Mfg#:
008553ECS01
In Stock
ON SALE!
Starting at $1305.07 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Dual Clutch Gear Oil 8100 - 5 Liter

ES#4158488 - 20116 - Dual Clutch Gear Oil 8100 - 5 Liter - Transmission fluid for your DSG or PDK equipped vehicle - Liqui-Moly - Audi BMW Volkswagen Porsche

Transmission fluid for your DSG or PDK equipped vehicle affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Liqui-Moly - Corporate Logo
ES#:
4158488
Mfg#:
20116
In Stock
36% off MSRP

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

$131.99

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

$84.99 USD
Free Shipping
on orders $49 and up

Spark Plugs - Set Of Six

ES#3691957 - 06m905606fKT - Spark Plugs - Set Of Six - Keep your engine running strong - Genuine Volkswagen Audi - Audi

Keep your engine running strong affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3691957
Mfg#:
06M905606FKT
In Stock
$87.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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