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Audi S4 Most Popular Parts

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Audi B9 A4 / S4 Flat Side Skirts - Gloss Black

ES#4163869 - 001734la01 - Audi B9 A4 / S4 Flat Side Skirts - Gloss Black - Enhance your side profile with an aggressive look! - ECS - Audi

Enhance your side profile with an aggressive look! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
4163869
Mfg#:
001734LA01
In Stock
ON SALE! SAVE 20%
$363.99

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

$291.19 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

IE Race Series FDS Intercooler System - B9/B9.5 S4/S5

ES#4698448 - IETPCK5 - IE Race Series FDS Intercooler System - B9/B9.5 S4/S5 - Increase horsepower and eliminate heatsoak - 280% larger than stock core! - Integrated Engineering - Audi

Increase horsepower and eliminate heatsoak - 280% larger than stock core! Requires IE Aluminum Charge Pipe Kit for installation (ES4685216)

Brand:
Integrated Engineering - Corporate Logo
ES#:
4698448
Mfg#:
IETPCK5
In Stock
$1414.99 USD
Free Shipping

Performance Baffled Oil Catch Can System - Audi B8 S4/S5 3.0T

ES#3142968 - 016632ecs01KT - Performance Baffled Oil Catch Can System - Audi B8 S4/S5 3.0T - Keep your B8 S4/S5 3.0T intake tract clean and carbon free - ECS - Audi

Keep your B8 S4/S5 3.0T intake tract clean and carbon free 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3142968
Mfg#:
016632ECS01KT
In Stock
ON SALE! SAVE 20%
$682.99

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

$546.39 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Timing Chain Kit - Ultimate

ES#2992125 - 06E109218ACKT1 - Timing Chain Kit - Ultimate - Includes new tensioners, guide rails, chains, & securing hardware to service your timing chain - Assembled By ECS - Audi
ECS Tuning recommends this product.

Includes new tensioners, guide rails, chains, & securing hardware to service your timing chain 10X Entries Into Our F80 M3 Sweepstakes
From the 2013 model year

Brand:
Assembled By ECS - Corporate Logo
ES#:
2992125
Mfg#:
06E109218ACKT1
Ships on Nov 16, 2026
ON SALE! SAVE 19%
$810.99

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

$655.07 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Front & Rear Brake Pad Kit - EBC RedStuff

ES#4031339 - dp32254cKT - Front & Rear Brake Pad Kit - EBC RedStuff - High performance street pad featuring Kevlar technology. - EBC - Audi

High performance street pad featuring Kevlar technology. 2X Entries Into Our F80 M3 Sweepstakes

Brand:
EBC - Corporate Logo
ES#:
4031339
Mfg#:
DP32254CKT
In Stock
$348.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Luft-Technik B9 S4 Front Mount Intercooler

ES#3537699 - 019219ecs01aKT - Luft-Technik B9 S4 Front Mount Intercooler - Reduce restrictions and increase cooling! - ECS - Audi

Reduce restrictions and increase cooling! 10X Entries Into Our F80 M3 Sweepstakes

For Pre-Facelift Models Only up to 11/08/2021

Brand:
ECS - Corporate Logo
ES#:
3537699
Mfg#:
019219ECS01AKT
In Stock
ON SALE! SAVE 15%
$742.99

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

$631.54 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

18" Style 881 Wheels - Set Of Four

ES#2598318 - 881AKT - 18" Style 881 Wheels - Set Of Four - 18"x8.5" ET45 5x112 57.1CB - Hyper Silver/Machined Lip - Alzor - Audi Volkswagen

18"x8.5" ET45 5x112 57.1CB - Hyper Silver/Machined Lip 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Alzor - Corporate Logo
ES#:
2598318
Mfg#:
881AKT
Ships on Jan 11, 2027
ON SALE! SAVE 25%
$1176.99

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

$883.26 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front & Rear Performance Brake Service Kit

ES#5433984 - 4M0615301AN9KT - Front & Rear Performance Brake Service Kit - Featuring Zimmermann Cross-Drilled rotors and EBC RedStuff Performance pads - Includes set screws, brake wear sensors, and silicone brake lubricant - Assembled By ECS - Audi

Featuring Zimmermann Cross-Drilled rotors and EBC RedStuff Performance pads - Includes set screws, brake wear sensors, and silicone brake lubricant 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
5433984
Mfg#:
4M0615301AN9KT
Ships in 1 Business Day
ON SALE! SAVE 15%
$1221.99

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

$1035.71 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Motul Gear 300 Manual Transmission / Differential Fluid (75w-90) - 1 Liter

ES#261741 - 317811 - Motul Gear 300 Manual Transmission / Differential Fluid (75w-90) - 1 Liter - Fully synthetic GL-4 / GL-5 gear oil, designed for high performance use - Motul - Audi BMW Volkswagen MINI Porsche

Fully synthetic GL-4 / GL-5 gear oil, designed for high performance use

Brand:
Motul - Corporate Logo
ES#:
261741
Mfg#:
317811
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.

$37.85

This product was last offered at the strikethrough price on
10-18-2026

$34.06 USD
Free Shipping
on orders $49 and up

EA839 High Pressure Fuel Pump Piston Upgrade Kit

ES#4623625 - 034-106-6054 - EA839 High Pressure Fuel Pump Piston Upgrade Kit - Unlock up to 37% more flow over the factory high pressure fuel pump! - 034Motorsport - Audi Porsche

Unlock up to 37% more flow over the factory high pressure fuel pump! 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
4623625
Mfg#:
034-106-6054
Back Ordered
$396.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

KW V3 Series Coilover Kit

ES#2092354 - 35210075 - KW V3 Series Coilover Kit - The ultimate in coilover technology featuring double adjustable dampening - KW Suspension - Audi

The ultimate in coilover technology featuring double adjustable dampening Fits sedan models without factory EDC. Range of lowering is 0.8-1.5" in the front and 0.4-1.5" in the rear.

Brand:
KW Suspension - Corporate Logo
ES#:
2092354
Mfg#:
35210075
Ships in 4 Business Days
$3394.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Wheel Bearing - Priced Each

ES#2731848 - 4H0498625A - Wheel Bearing - Priced Each - Fits the left and right side. Includes new hardware. - FAG - Audi Porsche

Fits the left and right side. Includes new hardware.

Brand:
FAG - Corporate Logo
ES#:
2731848
Mfg#:
4H0498625A
In Stock
$150.99

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

$118.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front & Rear Performance Brake Service Kit - 2-Piece

ES#4057315 - 023938ecs02KT1 - Front & Rear Performance Brake Service Kit - 2-Piece - Comprehensive kit includes 2-piece rotors, pads, sensors, and set screws - Upgrade your brake system with ECS 2-piece rotors and EBC Yellow Brake Pads! - Assembled By ECS - Audi

Comprehensive kit includes 2-piece rotors, pads, sensors, and set screws - Upgrade your brake system with ECS 2-piece rotors and EBC Yellow Brake Pads! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
4057315
Mfg#:
023938ECS02KT1
In Stock
ON SALE! SAVE 13%
$1949.99

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

$1689.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime 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! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
4876046
Mfg#:
053120LA02
Ships on Nov 9, 2026
ON SALE! SAVE 15%
$405.99

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

$345.09 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front 2-Piece Scalloped Brake Rotors - Pair (365x34)

ES#2785596 - 003281ECS02A02KT - Front 2-Piece Scalloped Brake Rotors - Pair (365x34) - Direct bolt-on upgrade to Tru-Float scalloped style rotors - ECS - Audi

Direct bolt-on upgrade to Tru-Float scalloped style rotors 10X Entries Into Our F80 M3 Sweepstakes

Replacement rotors for vehicles with the Stage 3 Audi RS Big Brake Kit

Brand:
ECS - Corporate Logo
ES#:
2785596
Mfg#:
003281ECS02A02KT
In Stock
ON SALE!
$1680.99

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

$1630.56 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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