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Audi A4 Performance Parts & Upgrades

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Milltek Cat-Back Exhaust System - Non-Resonated

Fits with factory exhaust outlets in bumper - no tips are included. For vehicles from the 2021 model year only.

Brand:
Milltek Sport - Corporate Logo
ES#:
5375825
Mfg#:
SSXAU1112
Ships in 3 Business Days
$1789.99 USD

Cat-Back Exhaust System

ES#2848045 - CTS-EXH-CB-0011 - Cat-Back Exhaust System - 2.5" stainless steel with dual 3" polished stainless tips - CTS - Audi

2.5" stainless steel with dual 3" polished stainless tips Manual transmission only

Brand:
CTS - Corporate Logo
ES#:
2848045
Mfg#:
CTS-EXH-CB-0011
Ships in 7 Business Days
ON SALE! SAVE 15%
$1049.99

This product was last offered at the strikethrough price on
07-10-2026

$892.49 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Stage 3 Daily Clutch Kit

ES#3098857 - 70205ssodmfKT - Stage 3 Daily Clutch Kit - Designed for high-powered street cars while capable enough to handle the track. Conservatively rated at 395ft/lbs. - South Bend Clutch - Audi Volkswagen

Designed for high-powered street cars while capable enough to handle the track. Conservatively rated at 395ft/lbs. Works with stock dual mass flywheel

Brand:
South Bend Clutch - Corporate Logo
ES#:
3098857
Mfg#:
70205SSODMFKT
Ships in 1 Business Day
$891.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Street Performance Coilover System

ES#845 - 29363-2 - Street Performance Coilover System - Average lowering height of 1.2"-2.2"F 0.75"-1.7"R - H&R - Audi

Average lowering height of 1.2"-2.2"F 0.75"-1.7"R 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
Sedan & Avant models only

Brand:
H&R - Corporate Logo
ES#:
845
Mfg#:
29363-2
Ships in 3 Business Days
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
07-01-2026

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

Street Performance Coilover System

ES#3221084 - 50356-2 - 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! 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat! For vehicles with production date from 7/12/2016 with 48.5mm front strut body
For vehicles without Sport Suspension or Magnetic Ride Control

Brand:
H&R - Corporate Logo
ES#:
3221084
Mfg#:
50356-2
Ships in 3 Business Days
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
07-01-2026

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

Street Performance Coilover System - Fixed Damping

ES#661 - 29591-3 - Street Performance Coilover System - Fixed Damping - Set your vehicle low and tight for optimal performance - H&R - Audi

Set your vehicle low and tight for optimal performance 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
Fits Sedan models only. Height adjustable from 1.6" to 2.5" Front & 1.6" to 2.0" Rear

Brand:
H&R - Corporate Logo
ES#:
661
Mfg#:
29591-3
Ships in 3 Business Days
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
07-01-2026

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

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

ES#3568762 - 002411ecs02aKT8 - Wheel Spacer & Bolt Kit - 10mm With 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#:
3568762
Mfg#:
002411ECS02AKT8
In Stock
ON SALE! SAVE 15%
$160.99

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

$136.84 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

1.8T Performance Ignition Service Kit

ES#5338584 - 056059LA094ISKT - 1.8T Performance Ignition Service Kit - Featuring ECS Performance Ignition Coils & OEM NGK platinum-core spark plugs for increased spark energy! - ECS - Audi Volkswagen

Featuring ECS Performance Ignition Coils & OEM NGK platinum-core spark plugs for increased spark energy! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
5338584
Mfg#:
056059LA094ISKT
In Stock
ON SALE! SAVE 20%
$220.99

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

$176.33 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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

ES#3183941 - 003883ecs01KT3 - Front Big Brake Kit - Stage 4 - 2-Piece Rotors (380x34) - Featuring ECS 380mm 2-piece rotors, ECS Stainless lines, and caliper brackets - Excludes calipers - ECS - Audi

Featuring ECS 380mm 2-piece rotors, ECS Stainless lines, and caliper brackets - Excludes calipers 10X Entries For Our 25th Anniversary Sweepstakes!
For customers that already sourced their own 8-piston RS5 calipers

Brand:
ECS - Corporate Logo
ES#:
3183941
Mfg#:
003883ECS01KT3
Ships on Dec 4, 2026
Auto Notify
ON SALE!
$1815.99

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

$1761.51 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Godspeed Traction-S Lowering Springs

ES#3426774 - LS-TS-AI-0005 - Godspeed Traction-S Lowering Springs - Aggressive looks with high performance handling - Average lowering F: 1.2" R: 1.2" - GODSPEED - Audi

Aggressive looks with high performance handling - Average lowering F: 1.2" R: 1.2"

Brand:
GODSPEED - Corporate Logo
ES#:
3426774
Mfg#:
LS-TS-AI-0005
Ships in 7 Business Days
$220.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Billet Aluminum 1.8T Fuel Injector Cup - Priced Each

ES#4899976 - 045960LA01-01 - Billet Aluminum 1.8T Fuel Injector Cup - Priced Each - Upgrade to heavy-duty billet aluminum construction for maximum durability! - ECS - Audi Volkswagen

Upgrade to heavy-duty billet aluminum construction for maximum durability! 10X Entries For Our 25th Anniversary Sweepstakes!
10X Entries For Our Spin To Win Sweepstakes!
For Vehicles with Engine Codes ATW and AWM.

Brand:
ECS - Corporate Logo
ES#:
4899976
Mfg#:
045960LA01-01
In Stock
ON SALE! SAVE 16%
$20.99

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

$17.59 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

JHM Aluminum Lightweight Flywheel

Weighs 7 to 10 lbs less compared to the OEM! Must use B8 S4-S5 clutch kit

Brand:
JH Motorsports - Corporate Logo
ES#:
4045998
Mfg#:
B8A4520TLWFW
Ships in 10 Business Days
$1750.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Blow-Off Valve Kit - Polished Valve

ES#2738365 - FMDVMK7A - Blow-Off Valve Kit - Polished Valve - Cure your leaking diverter valve problems for good! - Forge - Audi Volkswagen Porsche

Cure your leaking diverter valve problems for good!

Brand:
Forge - Corporate Logo
ES#:
2738365
Mfg#:
FMDVMK7A
Ships in 2 Business Days
$349.84 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front Slotted (Blade) Brake Rotors - Pair (320x30)

ES#3131994 - BSD1838 - Front Slotted (Blade) Brake Rotors - Pair (320x30) - The Uniquely created blade slot design helps to remove hot gases from the braking zone in a quick and efficient way - EBC - Audi

The Uniquely created blade slot design helps to remove hot gases from the braking zone in a quick and efficient way 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
EBC - Corporate Logo
ES#:
3131994
Mfg#:
BSD1838
Ships in 1 Business Day
5% off MSRP

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

$456.99

This product was last offered at the strikethrough price on
07-27-2026

$433.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

High Performance Rod Bearing Set - Standard

ES#4845793 - 4B1606H-STD - High Performance Rod Bearing Set - Standard - Includes upper and lower bearing shells for a complete rod bearing replacement. - ACL - Audi Volkswagen

Includes upper and lower bearing shells for a complete rod bearing replacement.

Brand:
ACL - Corporate Logo
ES#:
4845793
Mfg#:
4B1606H-STD
In Stock
$61.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Ball Seat Stud Conversion Kit

ES#2806943 - 001467ECS01KT4 - Ball Seat Stud Conversion Kit - Make wheel changes faster and easier - ECS - Audi Volkswagen

Make wheel changes faster and easier 10X Entries For Our 25th Anniversary Sweepstakes!
Includes 2 different length studs for up to 10mm spacers for 2 wheels and 20mm spacers for 2 wheels.

Brand:
ECS - Corporate Logo
ES#:
2806943
Mfg#:
001467ECS01KT4
In Stock
ON SALE!
$201.99

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

$191.89 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Performance Parts & Upgrades

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