Shop Our Clearance Sale - Up To 80% Off FREE SHIPPING on Orders $49+ *exclusions apply

Menu

Call Us330-331-2003 ChatLive Chat Text Us!
0 Shopping Cart
Your Vehicle

No Vehicle selected
Please select your vehicle below.

    • Audi
    • BMW
    • Mercedes Benz
    • MINI
    • Porsche
    • Volkswagen

Saved Vehicles

My Vehicles
You currently have no stored vehicles.

Recent Vehicles

Recent Vehicles Manage Vehicles

You currently have no recent vehicles.

We'll automatically keep fully selected vehicles here for your convenience.

Call Us330-331-2003 ChatLive Chat Text Us!
Track My Order View Order History Submit a Return Contact Us Wholesale Information Lifetime Replacement Returns and Warranty Information
0
Call Us330-331-2003 ChatLive Chat Text Us!
Track My Order View Order History Submit a Return Contact Us Wholesale Information Lifetime Replacement Returns and Warranty Information
Cancel
0
Sales & Specials
Enter Your Vehicle
garage-red
Your Vehicle Please tap 'Select' to pick a vehicle
Your Vehicle Please tap 'Select' to pick a vehicle
Select

Audi S4 Performance Parts & Upgrades

Sort By
Filter By
Return to Top

Front Limited Slip Differential

ES#2836967 - 18309170WK - Front Limited Slip Differential - Put all your power to the ground! - Wavetrac - Audi

Put all your power to the ground! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For models with 01E 6-Speed manual transmission only

Brand:
Wavetrac - Corporate Logo
ES#:
2836967
Mfg#:
18309170WK
Ships in 3 Business Days
$1515.99 USD
Free Shipping

DR Series Wheel Spacers - 15mm (1 Pair)

ES#275 - 3055665 - DR Series Wheel Spacers - 15mm (1 Pair) - Get a new set of spacers and widen the stance of your vehicle - H&R - Audi Mercedes Benz MINI Porsche

Get a new set of spacers and widen the stance of your 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:
H&R - Corporate Logo
ES#:
275
Mfg#:
3055665
Ships in 4 Business Days
14% off MSRP

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

$119.99

This product was last offered at the strikethrough price on
05-12-2026

$102.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B8 A4/S4 Pre-Facelift Carbon Fiber Radiator Support Cover

ES#3974236 - 024713ecs01KT - Audi B8 A4/S4 Pre-Facelift Carbon Fiber Radiator Support Cover - Carbon fiber, front and center! - ECS - Audi

Carbon fiber, front and center! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Fits pre-facelift models up to 2013

Brand:
ECS - Corporate Logo
ES#:
3974236
Mfg#:
024713ECS01KT
In Stock
ON SALE! SAVE 10%
$416.99

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

$375.29 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 S4 Pre-facelift Rear Diffuser & Trunk Spoiler

ES#4751275 - 028801ECS01EBKT - Audi B9 S4 Pre-facelift Rear Diffuser & Trunk Spoiler - Add some aggressive styling to your Audi! - Enthusiast Bundles - Audi

Add some aggressive styling to your Audi! Don't See A Bundle You Want - Give Us A Call Or Chat - We Will Make One! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits pre-facelift models (up to 2019) without integrated tips in the rear valance

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4751275
Mfg#:
028801ECS01EBKT
In Stock
ON SALE! SAVE 36%
$696.26

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

$449.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Valvesonic

ES#2827523 - SSXAU406 - Cat-Back Exhaust System - Valvesonic - 2.37" stainless steel with quad 100mm black Cerakote tips - Milltek Sport - Audi

2.37" stainless steel with quad 100mm black Cerakote tips affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
From the 2013 model year

Brand:
Milltek Sport - Corporate Logo
ES#:
2827523
Mfg#:
SSXAU406
Ships in 4 Business Days
$4460.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Performance Kevlar Reinforced Supercharger Belt

ES#3677878 - 06E903137AB - Performance Kevlar Reinforced Supercharger Belt - Our Red Kevlar accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. - ECS - Audi Volkswagen
ECS Tuning recommends this product.

Our Red Kevlar accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3677878
Mfg#:
06E903137AB
In Stock
$49.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ECS Tuning Tunnel Street Shield Aluminum Skid Plate Kit

ES#3610307 - 023780ecs02KT - ECS Tuning Tunnel Street Shield Aluminum Skid Plate Kit - Protect your vehicle's tunnel and improve aerodynamics - ECS - Audi

Protect your vehicle's tunnel and improve aerodynamics affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Fits Manual and DSG Transmissions

Brand:
ECS - Corporate Logo
ES#:
3610307
Mfg#:
023780ECS02KT
In Stock
ON SALE! SAVE 10%
$327.99

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

$296.10 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 Carbon Fiber Antenna Cover

ES#3468626 - 024985ECS01 - Audi B9 Carbon Fiber Antenna Cover - Add a unique, lightweight look to your B9 - ECS - Audi

Add a unique, lightweight look to your B9 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3468626
Mfg#:
024985ECS01
Ships in 8 Business Days
ON SALE! SAVE 16%
$98.99

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

$82.99 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! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3570284
Mfg#:
023149ECS02KT
Ships on Jun 25, 2026
Auto Notify
ON SALE! SAVE 15%
$236.99

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

$201.36 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Supercharger Inlet Kit - Silicone - Audi B8 S4/S5 3.0T

ES#3170829 - 007344ECS01KT2 - Supercharger Inlet Kit - Silicone - Audi B8 S4/S5 3.0T - Wire reinforced silicone smooths the intake tract & hinders collapsing. The ultimate in durability! - ECS - Audi
ECS Tuning recommends this product.

Wire reinforced silicone smooths the intake tract & hinders collapsing. The ultimate in durability! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3170829
Mfg#:
007344ECS01KT2
In Stock
ON SALE! SAVE 17%
$163.99

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

$135.99 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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2836833
Mfg#:
000931ECS02AKT
In Stock
ON SALE! SAVE 15%
$247.99

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

$210.79 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

rear HPS 5.0 Performance Brake Pad Set

ES#2748692 - HB642B.658 - rear HPS 5.0 Performance Brake Pad Set - Next generation high performance street brake pad offering greater stopping power and pedal feel, with very low dust and noise - Hawk - Audi

Next generation high performance street brake pad offering greater stopping power and pedal feel, with very low dust and noise affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Hawk - Corporate Logo
ES#:
2748692
Mfg#:
HB642B.658
In Stock
$151.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Throttle Body Upgrade Kit

ES#3647325 - IEINCG3 - Throttle Body Upgrade Kit - Remove the final power restriction on your 3.0T with an over 20% higher flowing throttle body, fully releasing the complete power potential from your factory supercharger. - Integrated Engineering - Audi

Remove the final power restriction on your 3.0T with an over 20% higher flowing throttle body, fully releasing the complete power potential from your factory supercharger. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!
* Existing IE Dual Pulley Upgrade Required *

Brand:
Integrated Engineering - Corporate Logo
ES#:
3647325
Mfg#:
IEINCG3
In Stock
$879.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi 3.0T Performance Overdrive Crank Pulley With ECS Performance Kevlar Reinforced Supercharger Belt - 187.3mm - For Use With Supercharger Pulley Upgrade

ES#4821293 - 025510ECS01KT3 - Audi 3.0T Performance Overdrive Crank Pulley With ECS Performance Kevlar Reinforced Supercharger Belt - 187.3mm - For Use With Supercharger Pulley Upgrade - Spin the supercharger faster without affecting the accessory drive system - ECS - Audi Volkswagen Porsche

Spin the supercharger faster without affecting the accessory drive system affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Appropriate stage 2 software is required for use

Brand:
ECS - Corporate Logo
ES#:
4821293
Mfg#:
025510ECS01KT3
Ships on Jun 29, 2026
Auto Notify
$399.98 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear EP24 "Enthusiast Performance" Brake Pad Set

ES#4739102 - EP24-1898 - Rear EP24 "Enthusiast Performance" Brake Pad Set - This enthusiast-developed high-performance street and light track pad offers an ideal solution for the spirited commuter and weekend autocross driver alike. - ECS - Audi

This enthusiast-developed high-performance street and light track pad offers an ideal solution for the spirited commuter and weekend autocross driver alike. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4739102
Mfg#:
EP24-1898
In Stock
ON SALE! SAVE 30%
$118.99

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

$82.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front Big Brake Kit - Stage 4 - 2-Piece Rotors (380x34)

ES#2785042 - 003883ECS02KT - Front Big Brake Kit - Stage 4 - 2-Piece Rotors (380x34) - Featuring Black RS5 8-piston calipers, ECS stainless steel lines & Hawk HPS pads - ECS - Audi

Featuring Black RS5 8-piston calipers, ECS stainless steel lines & Hawk HPS pads affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Please download the installation template to confirm this brake kit will fit behind your factory or after

Brand:
ECS - Corporate Logo
ES#:
2785042
Mfg#:
003883ECS02KT
Ships on Oct 19, 2026
Auto Notify
$4328.99 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

More About Performance Parts & Upgrades

All the performance upgrade options from the best brands in the business to help build your dreams. Our performance parts catalog is the largest anywhere and constantly growing to keep your build on track.

Let us help you find the parts that fit your Audi

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

Terms of Use Privacy Policy ECS Tuning is part of Enthusiast Auto Holdings