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Audi S4 Performance Parts & Upgrades

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Audi B8/8.5 S4 Valved Exhaust System - Resonated With 4" Chrome Swivel Tips

ES#3619908 - 008553ecs01KT - Audi B8/8.5 S4 Valved Exhaust System - Resonated With 4" Chrome Swivel Tips - ECS evolutionary design and manufacturing, blending with raw emotion, desire and passion, creating a truly unique driving experience - ECS - Audi
ECS Tuning recommends this product.

ECS evolutionary design and manufacturing, blending with raw emotion, desire and passion, creating a truly unique driving experience 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3619908
Mfg#:
008553ECS01KT
In Stock
ON SALE! SAVE 10%
$2192.99

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

$1973.69 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

034Motorsport Catch Can Kit - EA839 S4/S5

ES#4849699 - 034-101-1016 - 034Motorsport Catch Can Kit - EA839 S4/S5 - Engineered for enhanced durability to capture crankcase oil deposits before entering your intake tract - 034Motorsport - Audi

Engineered for enhanced durability to capture crankcase oil deposits before entering your intake tract

Brand:
034Motorsport - Corporate Logo
ES#:
4849699
Mfg#:
034-101-1016
Ships on Aug 31, 2026
Auto Notify
$729.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front 2-Piece Brake Rotors - Pair (345x30)

ES#2602983 - 000690ECS01AKT - Front 2-Piece Brake Rotors - Pair (345x30) - Direct bolt-on replacement - 25% less weight! - ECS - Audi Porsche

Direct bolt-on replacement - 25% less weight! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2602983
Mfg#:
000690ECS01AKT
Ships on Dec 31, 2026
Auto Notify
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

Audi/Porsche Thrust Arm Monoball Upgrade - Pre-Installed in Meyle HD Arms (M14 Ball Joints)

ES#4389690 - 006418LA01 - Audi/Porsche Thrust Arm Monoball Upgrade - Pre-Installed in Meyle HD Arms (M14 Ball Joints) - Eliminate deflection caused by stock rubber bushings! - ECS - Audi Porsche

Eliminate deflection caused by stock rubber bushings! 10X Entries For Our 25th Anniversary Sweepstakes!

Fits models from production date 11/3/2009 (M14 Ball Joints)

Brand:
ECS - Corporate Logo
ES#:
4389690
Mfg#:
006418LA01
In Stock
ON SALE!
$746.99

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

$724.58 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Wheel Spacer & Bolt Kit - 10mm With Black Conical Seat Bolts

ES#2748283 - 002411ECS02AKT1 - Wheel Spacer & Bolt Kit - 10mm 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#:
2748283
Mfg#:
002411ECS02AKT1
In Stock
ON SALE!
$152.99

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

$145.34 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 A4/S4 Transmission Street Shield Aluminum Skid Plate

ES#3979295 - 027567ecs01KT - Audi B9 A4/S4 Transmission Street Shield Aluminum Skid Plate - Protect your transmission pan and improve aerodynamics - ECS - Audi

Protect your transmission pan and improve aerodynamics 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3979295
Mfg#:
027567ECS01KT
In Stock
ON SALE! SAVE 15%
$354.99

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

$301.74 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

IE Audi 3.0T Crank Pulley Upgrade Kit - 207mm

ES#4491708 - IEBAVJ6 - IE Audi 3.0T Crank Pulley Upgrade Kit - 207mm - Increases boost for "dual pulley" tune power levels without replacing the press-on supercharger pulley for an easier install. - Integrated Engineering - Audi

Increases boost for "dual pulley" tune power levels without replacing the press-on supercharger pulley for an easier install. 5X Entries For Our 25th Anniversary Sweepstakes!
Requires stage 2 dual pulley ECU tune

Brand:
Integrated Engineering - Corporate Logo
ES#:
4491708
Mfg#:
IEBAVJ6
In Stock
$497.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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

ES#2748197 - ECS10159KTWB1 - ECS Wheel Spacer & Bolt Kit - 20mm With Black Ball Seat Bolts - Exclusively built for your 57.1mm centerbore VW/Audi & Includes everything you need to install spacers on two wheels - ECS - Audi Volkswagen

Exclusively built for your 57.1mm centerbore VW/Audi & Includes everything you need to install spacers on two wheels 10X Entries For Our 25th Anniversary Sweepstakes!
Fits OEM wheels or wheels that require ball seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2748197
Mfg#:
ECS10159KTWB1
In Stock
ON SALE! SAVE 10%
$183.99

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

$165.59 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS Wheel Spacers - 10mm (Pair)

ES#2622576 - 002403ECS02A10KT - ECS Wheel Spacers - 10mm (Pair) - Exclusively built for your 57.1mm centerbore VW/Audi - ECS - Audi Volkswagen

Exclusively built for your 57.1mm centerbore VW/Audi 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2622576
Mfg#:
002403ECS02A10KT
In Stock
ON SALE! SAVE 25%
$106.99

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

$80.24 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

JB4 Bluetooth Wireless Connect Kit - Pinned Power Wire

ES#3514868 - JB4-SPWCK-F - JB4 Bluetooth Wireless Connect Kit - Pinned Power Wire - Wirelessly connect your JB4 to your phone! - Burger Motorsports - Audi BMW Volkswagen Mercedes Benz

Wirelessly connect your JB4 to your phone! For JB4 systems produced 2017 and later. Please check board diagrams to properly identify your JB4 before ordering.
For use with JB4 only

Brand:
Burger Motorsports - Corporate Logo
ES#:
3514868
Mfg#:
JB4-SPWCK-F
In Stock
$159.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Audi B8/B8.5 A4/S4 Rear Window Spoiler - Gloss Black

ES#3713982 - 028446ECS01 - Audi B8/B8.5 A4/S4 Rear Window Spoiler - Gloss Black - Add subtle styling to complete the look! - ECS - Audi

Add subtle styling to complete the look! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3713982
Mfg#:
028446ECS01
In Stock
ON SALE! SAVE 15%
$201.99

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

$171.69 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Billet Diverter Valve - Polished

ES#3183558 - 034-145-5000-ALU - Billet Diverter Valve - Polished - High-performance spring and piston design is both durable and a performer! - 034Motorsport - Audi Volkswagen

High-performance spring and piston design is both durable and a performer! 2 required

Brand:
034Motorsport - Corporate Logo
ES#:
3183558
Mfg#:
034-145-5000-ALU
In Stock
$128.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 S4/S5 3.0T Luft-Technik Intake System

ES#3477816 - 023795ECS06 - Audi B9 S4/S5 3.0T Luft-Technik Intake System - Enhance your engine's performance with gains up to 16 Wheel Horsepower and 15 foot pounds of torque with our ECS Cold Air Intake - ECS - Audi

Enhance your engine's performance with gains up to 16 Wheel Horsepower and 15 foot pounds of torque with our ECS Cold Air Intake 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3477816
Mfg#:
023795ECS06
In Stock
ON SALE! SAVE 20%
$540.99

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

$432.79 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear RedStuff Performance Brake Pad Set

ES#4031324 - DP32254C - Rear RedStuff Performance Brake Pad Set - A high performance street pad, featuring Kevlar technology. - EBC - Audi

A high performance street pad, featuring Kevlar technology. 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
EBC - Corporate Logo
ES#:
4031324
Mfg#:
DP32254C
In Stock
5% off MSRP

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

$151.59

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

$144.01 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Dynamic+ Adjustable Rear Sway Bar End Link Kit

ES#4429979 - 034-402-4030 - Dynamic+ Adjustable Rear Sway Bar End Link Kit - Replace your flimsy, imprecise OEM sway bar end links with the performance engineered Dynamic+ Adjustable Rear Sway Bar End Link - 034Motorsport - Audi

Replace your flimsy, imprecise OEM sway bar end links with the performance engineered Dynamic+ Adjustable Rear Sway Bar End Link

Brand:
034Motorsport - Corporate Logo
ES#:
4429979
Mfg#:
034-402-4030
In Stock
$171.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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