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Audi A4 Performance Parts & Upgrades

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Bilstein B12 Pro-Kit Suspension System

ES#2983801 - 46-183354 - Bilstein B12 Pro-Kit Suspension System - Expertly matched performance Eibach Pro-line lowering springs and Bilstein shock/strut package for a dramatic increase in performance handling. World-famous Bilstein quality with a limited lifetime warranty! - Bilstein - Audi

Expertly matched performance Eibach Pro-line lowering springs and Bilstein shock/strut package for a dramatic increase in performance handling. World-famous Bilstein quality with a limited lifetime warranty! 2X Entries For Our 25th Anniversary Sweepstakes!
2X Entries For Our Spin To Win Sweepstakes!
For Avant models. Lowers 35mm front, 30mm rear

Brand:
Bilstein - Corporate Logo
ES#:
2983801
Mfg#:
46-183354
Ships on Sep 1, 2026
Auto Notify
$899.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Pro 5 R Air Intake System - Stage 2

ES#264115 - 54-10322 - Pro 5 R Air Intake System - Stage 2 - Add real power that you can feel - AFE - Audi

Add real power that you can feel CARB certified for sale in all 50 states

Brand:
AFE - Corporate Logo
ES#:
264115
Mfg#:
54-10322
EO#:
D-550-30
In Stock at Vendor
20% off MSRP

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

$498.75

This product was last offered at the strikethrough price on
05-13-2026

$399.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Wheel Spacer & Bolt Kit - 15mm With Black Ball Seat Bolts

ES#4723527 - 002411ECS03AKBKT - Wheel Spacer & Bolt Kit - 15mm With Black Ball Seat Bolts - Complete kit for two wheels, includes everything you need to install spacers - ECS - Audi

Complete kit for two wheels, includes everything you need to install spacers 10X Entries For Our 25th Anniversary Sweepstakes!
Fits OEM wheels, or wheels that use OEM ball seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
4723527
Mfg#:
002411ECS03AKBKT
In Stock
ON SALE! SAVE 25%
$190.99

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

$143.24 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front Cross-Drilled & Slotted 2-Piece Brake Rotors - Pair (380x34)

ES#2804479 - 003883ECS01A01KT - Front Cross-Drilled & Slotted 2-Piece Brake Rotors - Pair (380x34) - Replacement set for 380mm Stage 3-4 Big Brake Kits with Audi RS calipers - ECS - Audi

Replacement set for 380mm Stage 3-4 Big Brake Kits with Audi RS calipers 10X Entries For Our 25th Anniversary Sweepstakes!
*Replacement rotor set for customers that have our Stage 3/4 380mm kits with Audi RS Calipers*

Brand:
ECS - Corporate Logo
ES#:
2804479
Mfg#:
003883ECS01A01KT
In Stock
ON SALE!
$1229.99

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

$1193.09 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Street Performance Coilover System - Fixed Damping

ES#1077 - 29591-4 - 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 Avant models only. Height adjustable from 1.4" to 2.5" Front & 0.75" to 2.5" Rear

Brand:
H&R - Corporate Logo
ES#:
1077
Mfg#:
29591-4
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

V1 Series Coilover System - Fixed Damping

ES#2091945 - 10210032 - V1 Series Coilover System - Fixed Damping - Variant 1 coilovers offer the best balance between sporty driving and comfort - KW Suspension - Audi

Variant 1 coilovers offer the best balance between sporty driving and comfort Range of lowering is 1.5-2.9" in the front and rear.

Brand:
KW Suspension - Corporate Logo
ES#:
2091945
Mfg#:
10210032
In Stock at Vendor
$1774.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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

ES#2748198 - ECS10159KTWBC1 - ECS Wheel Spacer & Bolt Kit - 20mm With Black Conical Seat Bolts - Includes everything you need to install spacers on two wheels - ECS - Audi Volkswagen

Includes everything you need to install spacers on two wheels 10X Entries For Our 25th Anniversary Sweepstakes!
Fits most aftermarket wheels that require conical seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2748198
Mfg#:
ECS10159KTWBC1
In Stock
ON SALE!
$176.99

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

$168.14 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

KW V3 Series Coilover Kit

ES#4056866 - 352100BH - KW V3 Series Coilover Kit - The ultimate in coilover technology, featuring double adjustable damping - KW Suspension - Audi

The ultimate in coilover technology, featuring double adjustable damping For models without factory Electronic Damping Control - For models with 50mm front strut body. Range of lowering is 1.2-2.2" in the front and 1.4-2.4" in the rear.

Brand:
KW Suspension - Corporate Logo
ES#:
4056866
Mfg#:
352100BH
Back Ordered
$3524.00 USD
Free Shipping

Adjustable Fuel Pressure Regulator

ES#5271 - 001564ECS01 - Adjustable Fuel Pressure Regulator - Works as a replacement for most Bosch fuel pressure regulators. Adjustable from 25psi - 75psi - ECS - Audi Volkswagen

Works as a replacement for most Bosch fuel pressure regulators. Adjustable from 25psi - 75psi 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
5271
Mfg#:
001564ECS01
In Stock
ON SALE! SAVE 15%
$229.99

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

$195.49 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

2.0T Billet Boost Tap Assembly - Aluminum Intake Manifold

ES#2992381 - 0013625ECS01 - 2.0T Billet Boost Tap Assembly - Aluminum Intake Manifold - Designed specifically for the 2.0T engine, includes necessary hardware and custom bracket - ECS - Audi

Designed specifically for the 2.0T engine, includes necessary hardware and custom bracket 10X Entries For Our 25th Anniversary Sweepstakes!

For vehicles with metal intake manifolds

Brand:
ECS - Corporate Logo
ES#:
2992381
Mfg#:
0013625ECS01
In Stock
$99.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Performance Lightweight Flywheel Kit - Stage 2 Endurance

ES#3449155 - k70614hdofeKT1 - Performance Lightweight Flywheel Kit - Stage 2 Endurance - South Bend Lightweight Single Mass Flywheel with the South Bend Stage 2 clutch kit rated at 440ft/lbs - South Bend Clutch - Audi

South Bend Lightweight Single Mass Flywheel with the South Bend Stage 2 clutch kit rated at 440ft/lbs

Brand:
South Bend Clutch - Corporate Logo
ES#:
3449155
Mfg#:
K70614HDOFEKT1
Ships in 1 Business Day
$3483.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Carbon Fiber ECU Cover - Audi B9 A4/A5

ES#3136956 - 019468ECS01A - Carbon Fiber ECU Cover - Audi B9 A4/A5 - Compliment your engine bay and hide away the exposed ECU - ECS - Audi

Compliment your engine bay and hide away the exposed ECU 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3136956
Mfg#:
019468ECS01A
In Stock
ON SALE! SAVE 15%
$214.99

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

$182.74 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Ignition Service Kit - With Service Tools

ES#4349867 - 06e905115fKT7 - Ignition Service Kit - With Service Tools - Includes four Bosch red coil packs and four NGK iridium spark plugs (BKR8EIX - One heat range colder) - Assembled By ECS - Audi Volkswagen

Includes four Bosch red coil packs and four NGK iridium spark plugs (BKR8EIX - One heat range colder) 10X Entries For Our 25th Anniversary Sweepstakes!
Beneficial to cars with basic performance upgrades

Brand:
Assembled By ECS - Corporate Logo
ES#:
4349867
Mfg#:
06E905115FKT7
In Stock
ON SALE! SAVE 14%
$267.99

This product was last offered at the strikethrough price on
03-12-2026

$231.24 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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