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Audi S4 Most Popular Parts

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Ignition Coil - Priced Each

ES#3245922 - 06E905115F - Ignition Coil - Priced Each - Get rid of that nasty misfire. Features a Red colored top - Bosch - Audi Volkswagen

Get rid of that nasty misfire. Features a Red colored top 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
3245922
Mfg#:
06E905115F
In Stock
$43.99

This product was last offered at the strikethrough price on
03-11-2026

$32.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cup Kit/Coilover Installation Kit

ES#2762762 - 8K0412377CKT5 - Cup Kit/Coilover Installation Kit - Includes all necessary items for a quick and easy install. - Assembled By ECS - Audi

Includes all necessary items for a quick and easy install. 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
2762762
Mfg#:
8K0412377CKT5
In Stock
ON SALE!
$337.00

This product was last offered at the strikethrough price on
04-28-2026

$306.94 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Top Tec 6200 Engine Oil (0W-20) - 1 Liter

ES#3552700 - 20236 - Top Tec 6200 Engine Oil (0W-20) - 1 Liter - Engineered to help enhance fuel economy. 508/509 approval. - Liqui-Moly - Audi Volkswagen

Engineered to help enhance fuel economy. 508/509 approval. 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Liqui-Moly - Corporate Logo
ES#:
3552700
Mfg#:
20236
In Stock
29% off MSRP

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

$17.99

This product was last offered at the strikethrough price on
03-08-2026

$12.69 USD
Free Shipping
on orders $49 and up

Audi B8.5 S4 / A4 S-Line Carbon Fiber Rear Diffuser

ES#3085916 - 018359ECS01A - Audi B8.5 S4 / A4 S-Line Carbon Fiber Rear Diffuser - Hand-laid carbon fiber to upgrade your exterior styling - ECS - Audi

Hand-laid carbon fiber to upgrade your exterior styling 10X Entries For Our 25th Anniversary Sweepstakes!

From the 2013 model year

Brand:
ECS - Corporate Logo
ES#:
3085916
Mfg#:
018359ECS01A
In Stock
ON SALE! SAVE 10%
$1019.99

This product was last offered at the strikethrough price on
06-13-2026

$917.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Transmission Mount Bushing Insert Kit

ES#3023205 - 009860ECS01 - Transmission Mount Bushing Insert Kit - Decrease transmission mount slop for better drivetrain response! - ECS - Audi Porsche

Decrease transmission mount slop for better drivetrain response! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3023205
Mfg#:
009860ECS01
In Stock
ON SALE! SAVE 25%
$101.99

This product was last offered at the strikethrough price on
06-13-2026

$76.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Conical Seat Tuner Spline Bolt Set - Black

ES#2713058 - BOLT-14x1.5BK - Conical Seat Tuner Spline Bolt Set - Black - Full set of 20 of socket-specific lug bolts. 14x1.5x28mm - MRR Design - Audi BMW Volkswagen

Full set of 20 of socket-specific lug bolts. 14x1.5x28mm

Brand:
MRR Design - Corporate Logo
ES#:
2713058
Mfg#:
BOLT-14X1.5BK
Ships in 1 Business Day
$59.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

APR Iridium Pro Spark Plugs - Set Of 6

ES#4905816 - Z1004081X6KT - APR Iridium Pro Spark Plugs - Set Of 6 - Designed for high performance / tuned vehicle applications - APR - Audi Porsche

Designed for high performance / tuned vehicle applications Call In Or Chat For Best Price! 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
APR - Corporate Logo
ES#:
4905816
Mfg#:
Z1004081X6KT
In Stock
$161.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Luft-Technik Intake System - Silicone Inlet - Audi B8 S4/S5 3.0T

ES#2992531 - 007344ECS01 - Luft-Technik Intake System - Silicone Inlet - Audi B8 S4/S5 3.0T - Engineered for increased engine performance with show quality looks - ECS - Audi
ECS Tuning recommends this product.

Engineered for increased engine performance with show quality looks 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2992531
Mfg#:
007344ECS01
In Stock
ON SALE! SAVE 29%
$537.99

This product was last offered at the strikethrough price on
06-13-2026

$379.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Bilstein B16 DampTronic Suspension System

ES#4390702 - 49-290868 - Bilstein B16 DampTronic Suspension System - Features ride height adjustability with dampers compatible with OE electronic damping systems. - Bilstein - Audi

Features ride height adjustability with dampers compatible with OE electronic damping systems. 2X Entries For Our 25th Anniversary Sweepstakes!
For vehicles with production date from 7/12/2016 with 53mm front strut body

Brand:
Bilstein - Corporate Logo
ES#:
4390702
Mfg#:
49-290868
Back Ordered
Auto Notify
31% off MSRP

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

$3611.00

This product was last offered at the strikethrough price on
07-22-2026

$2499.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

18" Alzor Style 349 Wheel & Tire Package - Ironman (225/40R18)

ES#4876721 - 8999955 - 18" Alzor Style 349 Wheel & Tire Package - Ironman (225/40R18) - 18x8 ET45 5x112 57.1CB - Silver - With Ironman iMove Gen 3 Tires (UHP All-Season 92W XL 380AA) - Assembled By ECS - Audi Volkswagen

18x8 ET45 5x112 57.1CB - Silver - With Ironman iMove Gen 3 Tires (UHP All-Season 92W XL 380AA) 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4876721
Mfg#:
8999955
In Stock
ON SALE! SAVE 10%
$1701.99

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

$1531.51 USD

D3S 5000K XB HID Bulb - Pair

ES#4212782 - MM.N.076 - D3S 5000K XB HID Bulb - Pair - Quality replacement xenon bulbs from Morimoto - Morimoto - Audi Volkswagen

Quality replacement xenon bulbs from Morimoto

Brand:
Morimoto - Corporate Logo
ES#:
4212782
Mfg#:
MM.N.076
In Stock
$90.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

RS4 K04 Turbocharger - Left

ES#4140512 - 53049880025 - RS4 K04 Turbocharger - Left - Does not include hardware - BorgWarner - Audi

Does not include hardware Does NOT include hardware or the RS4/modified intake pipes necessary for a complete install - For a bolt-on solution, please see 034Motorsport's inlet pipe kit 034-145-P002 (ES2864575).

Brand:
BorgWarner - Corporate Logo
ES#:
4140512
Mfg#:
53049880025
Ships in 2 Business Days
$1529.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Wheel Spacer & Bolt Kit - 20mm With Black Conical Seat Bolts

ES#2748292 - 6-ECS-024 - Wheel Spacer & Bolt Kit - 20mm With Black Conical Seat Bolts - Complete kit for two wheels, comes with everything you need to install spacers on your aftermarket wheels - ECS - Audi

Complete kit for two wheels, comes with everything you need to install spacers on your aftermarket wheels 10X Entries For Our 25th Anniversary Sweepstakes!
Fits most aftermarket wheels that use conical seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2748292
Mfg#:
6-ECS-024
In Stock
ON SALE! SAVE 10%
$187.99

This product was last offered at the strikethrough price on
06-13-2026

$169.19 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Street Performance Coilover System

ES#3187951 - 50356 - Street Performance Coilover System - Finally, A performance coilover suspension system for your B9 Audi - Offering unrivaled comfort and performance! - H&R - Audi

Finally, A performance coilover suspension system for your B9 Audi - Offering unrivaled comfort and performance! 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
For vehicles without Sport Suspension or Magnetic Ride Control

Brand:
H&R - Corporate Logo
ES#:
3187951
Mfg#:
50356
In Stock
10% off MSRP

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

$1980.00

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

$1782.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Water Pump Kit

ES#4472399 - 06E121018KKT - Water Pump Kit - Includes a new water pump and thermostat - Assembled By ECS - Audi

Includes a new water pump and thermostat 10X Entries For Our 25th Anniversary Sweepstakes!
Fits from the 2013 model year (facelift)

Brand:
Assembled By ECS - Corporate Logo
ES#:
4472399
Mfg#:
06E121018KKT
In Stock
ON SALE! SAVE 10%
$340.99

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

$306.21 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

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