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Audi S4 Most Popular Parts

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Ball Seat Locking Wheel Bolt Kit

ES#4745663 - 003901ECS40BB - Ball Seat Locking Wheel Bolt Kit - Black zinc coated wheel lock bolts made specifically for OE wheels. M14x1.5x40mm - ECS - Audi Volkswagen

Black zinc coated wheel lock bolts made specifically for OE wheels. M14x1.5x40mm 10X Entries Into Our F80 M3 Sweepstakes
For use with 10-12.5mm spacers

Brand:
ECS - Corporate Logo
ES#:
4745663
Mfg#:
003901ECS40BB
In Stock
ON SALE! SAVE 25%
$72.99

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

$54.74 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Audi B8/B8.5 S4/S5 Carbon Fiber Left Side Engine Bay Cover

ES#3570284 - 023149ecs02KT - Audi B8/B8.5 S4/S5 Carbon Fiber Left Side Engine Bay Cover - Cover up unsightly under hood components with carbon fiber style! - ECS - Audi

Cover up unsightly under hood components with carbon fiber style! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3570284
Mfg#:
023149ECS02KT
In Stock
ON SALE! SAVE 15%
$241.99

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

$205.69 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

19" A02 Wheels - Bronze - Set Of Four

ES#4629210 - whl00039KT - 19" A02 Wheels - Bronze - Set Of Four - 19x8.5" ET45 5X112 - Bronze - APR - Audi BMW Volkswagen MINI

19x8.5" ET45 5X112 - Bronze Call In Or Chat For Best Price!

Wheel spacers may be necessary to clear brake calipers

Brand:
APR - Corporate Logo
ES#:
4629210
Mfg#:
WHL00039KT
In Stock
ON SALE! SAVE 10%
$1599.99

This product was last offered at the strikethrough price on
09-28-2026

$1439.82 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front Wheel Bearing And Hub Assembly Kit

ES#2826409 - 008442ecs01KT - Front Wheel Bearing And Hub Assembly Kit - Includes the left and right side bearing and hub pressed together for you! - Assembled By ECS - Audi

Includes the left and right side bearing and hub pressed together for you! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2826409
Mfg#:
008442ECS01KT
In Stock
ON SALE! SAVE 18%
$276.99

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

$227.18 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Supercharger Inlet Kit - Carbon Fiber - Audi B8 S4/S5 3.0T

ES#2836833 - 000931ecs02aKT - Supercharger Inlet Kit - Carbon Fiber - Audi B8 S4/S5 3.0T - Replace the accordion throttle body hose with a smooth carbon fiber tube - ECS - Audi

Replace the accordion throttle body hose with a smooth carbon fiber tube 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
2836833
Mfg#:
000931ECS02AKT
In Stock
ON SALE! SAVE 15%
$252.99

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

$215.04 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front Axle Assembly - Left

ES#3072342 - 8E0407271AT - Front Axle Assembly - Left - Complete driveshaft with CV joints; ready for installation - GKN Drivetech - Audi

Complete driveshaft with CV joints; ready for installation

Brand:
GKN Drivetech - Corporate Logo
ES#:
3072342
Mfg#:
8E0407271AT
In Stock
ON SALE! SAVE 20%
$673.72

This product was last offered at the strikethrough price on
05-09-2026

$536.89 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

EMD Auto 15mm Wheel Spacers - Pair (With Bolts)

ES#4042997 - EMD-SPACER15665B - EMD Auto 15mm Wheel Spacers - Pair (With Bolts) - Manufactured out of high quality 6061-T6 aluminum, and black anodized for corrosion resistance - 5x112, 66.5 Center Bore - Emmanuele Design - Audi

Manufactured out of high quality 6061-T6 aluminum, and black anodized for corrosion resistance - 5x112, 66.5 Center Bore

Brand:
Emmanuele Design - Corporate Logo
ES#:
4042997
Mfg#:
EMD-SPACER15665B
In Stock
$110.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front bumper securing hardware set

ES#2503339 - 8K0098623 - Front bumper securing hardware set - Includes all of the necessary hardware for the front bumper - Genuine Volkswagen Audi - Audi

Includes all of the necessary hardware for the front bumper

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2503339
Mfg#:
8K0098623
In Stock
8% off MSRP

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

$179.99

This product was last offered at the strikethrough price on
10-25-2026

$164.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

15mm Wheel Spacers - Black (Pair)

ES#3476433 - 021460TMS03-04 - 15mm Wheel Spacers - Black (Pair) - Lightweight wheel spacers with a machined tab for easy removal - Turner Motorsport - Audi BMW MINI Porsche

Lightweight wheel spacers with a machined tab for easy removal 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Turner Motorsport - Corporate Logo
ES#:
3476433
Mfg#:
021460TMS03-04
In Stock
ON SALE! SAVE 15%
$151.99

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

$129.19 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Unitronic Performance Software - Stage 1+ - With UniCONNECT+ Cable

ES#4375901 - 30T-EA839-1+-UC - Unitronic Performance Software - Stage 1+ - With UniCONNECT+ Cable - Gain up to 100 horsepower and 112 lb-ft of torque on 93 Octane - Unitronic - Audi

Gain up to 100 horsepower and 112 lb-ft of torque on 93 Octane This tune can be performed at home with the included UniCONNECT+ cable. Only available for purchase in th

Brand:
Unitronic - Corporate Logo
ES#:
4375901
Mfg#:
30T-EA839-1+-UC
In Stock
$1064.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ST XA Performance Coilover System - Adjustable Damping

ES#4056966 - 18210075 - ST XA Performance Coilover System - Adjustable Damping - Developed alongside KW Automotive, the ST XA allows individual adjustment of the damping to suit just about all your driving needs! - Suspension Techniques - Audi

Developed alongside KW Automotive, the ST XA allows individual adjustment of the damping to suit just about all your driving needs! Sedan Models Only - Average lowering of 0.6'' to 1.8'' front and 0.6" to 1.6" rear - Vehicles equipped with Electronic Damping Control (EDC) will lose shock dampening and receive a system error code with coilover systems

Brand:
Suspension Techniques - Corporate Logo
ES#:
4056966
Mfg#:
18210075
In Stock at Vendor
$1419.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

IE 3.0T High Pressure Fuel Pump (HPFP) Internal Upgrade Kit

ES#4642770 - IEFUVO1 - IE 3.0T High Pressure Fuel Pump (HPFP) Internal Upgrade Kit - IE's HPFP internals upgrade kit for the Audi 3.0TFSI Supercharged engines is perfect for the DIY user looking to upgrade their factory-equipped HPFP pump body with new higher flowing internals - Integrated Engineering - Audi

IE's HPFP internals upgrade kit for the Audi 3.0TFSI Supercharged engines is perfect for the DIY user looking to upgrade their factory-equipped HPFP pump body with new higher flowing internals

Brand:
Integrated Engineering - Corporate Logo
ES#:
4642770
Mfg#:
IEFUVO1
In Stock
$472.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

APR Lug Bolts (Set of 10) - 40mm

ES#3570137 - MS100176 - APR Lug Bolts (Set of 10) - 40mm - Black zinc coated 40mm ball set wheel bolts to be used with 12mm wheel spacers - APR - Audi Volkswagen

Black zinc coated 40mm ball set wheel bolts to be used with 12mm wheel spacers Call In Or Chat For Best Price!

Brand:
APR - Corporate Logo
ES#:
3570137
Mfg#:
MS100176
Ships in 3 Business Days
ON SALE! SAVE 10%
$58.99

This product was last offered at the strikethrough price on
09-28-2026

$53.06 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cam Chain Tensioner - Cylinders 1-3 (Right)

ES#3220568 - 078109088H - Cam Chain Tensioner - Cylinders 1-3 (Right) - Applies tension to the camshaft timing chain - Bremmen Parts - Audi Volkswagen

Applies tension to the camshaft timing chain 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bremmen Parts - Corporate Logo
ES#:
3220568
Mfg#:
078109088H
In Stock
ON SALE! SAVE 15%
$191.99

This product was last offered at the strikethrough price on
09-16-2026

$163.19 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

19" Tekniform Style 013 - Set Of Four

ES#4338090 - 013-1KT - 19" Tekniform Style 013 - Set Of Four - 19"x8.5" ET40 5x112 - Hyper Silver - Tekniform - Audi BMW MINI

19"x8.5" ET40 5x112 - Hyper Silver

Brand:
Tekniform - Corporate Logo
ES#:
4338090
Mfg#:
013-1KT
In Stock
ON SALE! SAVE 20%
$1323.99

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

$1058.82 USD
This product is lifetime replacement eligible Lifetime Replacement

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