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Audi S4 Performance Parts & Upgrades

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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 Into Our F80 M3 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

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 Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3477816
Mfg#:
023795ECS06
Ships on Nov 17, 2026
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

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 Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
2602983
Mfg#:
000690ECS01AKT
Ships on Mar 29, 2027
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

Rear Special Active Shock Absorber - Priced Each

ES#3560586 - 80451265 - Rear Special Active Shock Absorber - Priced Each - Superior handling without compromising ride quality - Koni - Audi

Superior handling without compromising ride quality Vehicles equipped with Electronic Damping Control (EDC) will lose factory shock damping and receive a system error code

Brand:
Koni - Corporate Logo
ES#:
3560586
Mfg#:
80451265
In Stock
38% off MSRP

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

$261.21

This product was last offered at the strikethrough price on
08-25-2026

$160.78 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 Into Our F80 M3 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

Audi B6 S4 Catback Exhaust

ES#4756568 - 041486ECS01 - Audi B6 S4 Catback Exhaust - Choose your own configuration along with your choice of exhaust tips and more! - ECS - Audi

Choose your own configuration along with your choice of exhaust tips and more! 10X Entries Into Our F80 M3 Sweepstakes

For Sedan models only.

Brand:
ECS - Corporate Logo
ES#:
4756568
Mfg#:
041486ECS01
Back Ordered
ON SALE!
Starting at $833.33 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front V5 Dimpled & Slotted Brake Rotors - Set (345x30)

ES#4668212 - 8K0615301M-XS - Front V5 Dimpled & Slotted Brake Rotors - Set (345x30) - Precision manufactured for consistent stopping power during high performance driving. Featuring a matte black zinc coating for corrosion protection. - ECS - Audi

Precision manufactured for consistent stopping power during high performance driving. Featuring a matte black zinc coating for corrosion protection. 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
4668212
Mfg#:
8K0615301M-XS
In Stock
ON SALE!
$521.99

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

$486.38 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! 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
10-01-2026

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

High Performance B5 S4 All Aluminum Radiator

ES#3220600 - 7071 - High Performance B5 S4 All Aluminum Radiator - Great option if youre looking to modify, upgrade, or simply keep up with the maintenance - CSF - Audi

Great option if you’re looking to modify, upgrade, or simply keep up with the maintenance 2X Entries Into Our F80 M3 Sweepstakes

Brand:
CSF - Corporate Logo
ES#:
3220600
Mfg#:
7071
In Stock
$559.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rear 2-Piece Brake Rotors - Pair (330x22)

ES#2681143 - 002879ECS01AKT - Rear 2-Piece Brake Rotors - Pair (330x22) - Direct bolt-on replacement - 18% less weight! - ECS - Audi Porsche

Direct bolt-on replacement - 18% less weight! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
2681143
Mfg#:
002879ECS01AKT
In Stock
ON SALE!
$729.99

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

$708.06 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front & Rear Exact-Fit Stainless Steel Brake Lines - Kit

ES#1899278 - ecs41016/63 - Front & Rear Exact-Fit Stainless Steel Brake Lines - Kit - Complete set of DOT-compliant lines for an improved pedal feel - ECS - Audi
ECS Tuning recommends this product.

Complete set of DOT-compliant lines for an improved pedal feel 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
1899278
Mfg#:
ECS41016/63
In Stock
ON SALE!
$216.98

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

$206.13 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

B8 3.0T Stage 2 Performance Clutch Kit & Lightweight Flywheel & Drivetrain Mount Insert Kit

ES#4876408 - 048470LAEBKT - B8 3.0T Stage 2 Performance Clutch Kit & Lightweight Flywheel & Drivetrain Mount Insert Kit - Receive discounted Drivetrain Mount Inserts with your purchase of a Stage 2 Clutch & Lightweight Flywheel kit! - Enthusiast Bundles - Audi

Receive discounted Drivetrain Mount Inserts with your purchase of a Stage 2 Clutch & Lightweight Flywheel kit! Don't See A Bundle You Want - Give Us A Call Or Chat - We Will Make One!

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4876408
Mfg#:
048470LAEBKT
In Stock
ON SALE! SAVE 28%
$2897.46

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

$2098.92 USD
This product is lifetime replacement eligible Lifetime Replacement

DR Series Wheel Spacers - 15mm (1 Pair) Black

ES#2730959 - 3055665SW - DR Series Wheel Spacers - 15mm (1 Pair) Black - Get a new set of spacers and widen the stance of your vehicle - H&R - Audi Mercedes Benz Porsche

Get a new set of spacers and widen the stance of your vehicle We Price Match - Give Us A Call or Chat!

Brand:
H&R - Corporate Logo
ES#:
2730959
Mfg#:
3055665SW
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.

$119.99

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

$107.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

B5 S4 Valved or Non-Valved Cat Back Exhaust

ES#4698873 - 041750LA - B5 S4 Valved or Non-Valved Cat Back Exhaust - Experience your driving passion with our ECS Exhaust System! - ECS - Audi

Experience your driving passion with our ECS Exhaust System! 10X Entries Into Our F80 M3 Sweepstakes
Fits both Sedan and Avant

Brand:
ECS - Corporate Logo
ES#:
4698873
Mfg#:
041750LA
In Stock
ON SALE!
Starting at $498.14 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Dual Pulley Hardware Kit -190mm

ES#4858461 - 034-145-Z047 - Dual Pulley Hardware Kit -190mm - Increase supercharger rotational speed to provide more boost to your engine. - 034Motorsport - Audi

Increase supercharger rotational speed to provide more boost to your engine. 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
4858461
Mfg#:
034-145-Z047
In Stock
$692.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Carbon Fiber Mirror Cap Set - Audi B9 A4/A5/S4/S5

ES#3411932 - 024564ECS01 - Carbon Fiber Mirror Cap Set - Audi B9 A4/A5/S4/S5 - With Lane Change Assist - ECS - Audi

With Lane Change Assist 10X Entries Into Our F80 M3 Sweepstakes

For vehicles with lane change assist

Brand:
ECS - Corporate Logo
ES#:
3411932
Mfg#:
024564ECS01
In Stock
ON SALE! SAVE 20%
$413.99

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

$331.19 USD
Free Shipping
This product is lifetime replacement eligible Lifetime 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.

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