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Audi A4 Performance Parts & Upgrades

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Adjustable Rear Tie Rod Set

ES#4701674 - TRS-005 - Adjustable Rear Tie Rod Set - Enables very precise setting of rear geometry settings. A must-have for track or race use! - Verkline - Audi

Enables very precise setting of rear geometry settings. A must-have for track or race use!

Brand:
Verkline - Corporate Logo
ES#:
4701674
Mfg#:
TRS-005
Ships in 1 Business Day
$324.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Diverter Valve Kit - Polished

ES#3499516 - FMDVMK7RC - Diverter Valve Kit - Polished - Cure your leaking valve problems for good! - Forge - Audi Volkswagen Porsche

Cure your leaking valve problems for good!

Brand:
Forge - Corporate Logo
ES#:
3499516
Mfg#:
FMDVMK7RC
Ships in 8 Business Days
$323.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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

ES#2731271 - 3055571SW - DR Series Wheel Spacers (Black) - 15mm (1 Pair) - Fine tune your stance and improve handling - H&R - Audi Volkswagen

Fine tune your stance and improve handling 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
H&R - Corporate Logo
ES#:
2731271
Mfg#:
3055571SW
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
07-01-2026

$107.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front Exact-Fit Stainless Steel Brake Lines

ES#250735 - ECS41054KT - Front Exact-Fit Stainless Steel Brake Lines - Front set of DOT-compliant lines for an improved pedal feel - ECS - Audi

Front set of DOT-compliant lines for an improved pedal feel 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
250735
Mfg#:
ECS41054KT
In Stock
ON SALE! SAVE 15%
$100.99

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

$85.84 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Track Spec Density Line Control Arm Kit - Front

ES#4159608 - 034-401-1056 - Track Spec Density Line Control Arm Kit - Front - Includes lower control arms, upper adjustable control arms, M14 ball joints and all necessary hardware. - 034Motorsport - Audi

Includes lower control arms, upper adjustable control arms, M14 ball joints and all necessary hardware. For vehicles with M14 ball joints

Brand:
034Motorsport - Corporate Logo
ES#:
4159608
Mfg#:
034-401-1056
Back Ordered
$1285.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

KW H.A.S. - Height Adjustable Spring Kit

ES#3427372 - 253100BJ - KW H.A.S. - Height Adjustable Spring Kit - Retains the use of your factory shocks while providing the ability to adjust ride height from 0.6" to 1.6" Front 1.0" to 1.8" Rear - KW Suspension - Audi

Retains the use of your factory shocks while providing the ability to adjust ride height from 0.6" to 1.6" Front 1.0" to 1.8" Rear For models with factory Electronic Damping Control suspension

Brand:
KW Suspension - Corporate Logo
ES#:
3427372
Mfg#:
253100BJ
Ships in 4 Business Days
$1284.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

KW H.A.S. - Height Adjustable Spring Kit

ES#3427369 - 253100BH - KW H.A.S. - Height Adjustable Spring Kit - Retains the use of your factory shocks while providing the ability to adjust ride height from 0.6" to 1.6" Front 1.0" to 1.8" Rear - KW Suspension - Audi

Retains the use of your factory shocks while providing the ability to adjust ride height from 0.6" to 1.6" Front 1.0" to 1.8" Rear For models without factory Electronic Damping Control - For models

Brand:
KW Suspension - Corporate Logo
ES#:
3427369
Mfg#:
253100BH
Ships in 4 Business Days
$1284.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

KW H.A.S. - Height Adjustable Spring Kit

ES#3427370 - 253100BM - KW H.A.S. - Height Adjustable Spring Kit - Retains the use of your factory shocks while providing the ability to adjust ride height from 0.6" to 1.6" Front 1.0" to 1.8" Rear - KW Suspension - Audi

Retains the use of your factory shocks while providing the ability to adjust ride height from 0.6" to 1.6" Front 1.0" to 1.8" Rear For models without factory Electronic Damping Control - For models

Brand:
KW Suspension - Corporate Logo
ES#:
3427370
Mfg#:
253100BM
Ships in 4 Business Days
$1284.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Track Spec Density Line Control Arm Kit - Front

Includes lower control arms, upper adjustable control arms, M12 ball joints and all necessary hardware. For vehicles with M12 ball joints

Brand:
034Motorsport - Corporate Logo
ES#:
4159610
Mfg#:
034-401-1057
Back Ordered
$1284.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Wheel Spacer & Bolt Kit - 8mm with Black Ball Seat Bolts

ES#2788501 - 002411ECS04A8KT2 - Wheel Spacer & Bolt Kit - 8mm with Black Ball Seat Bolts - Includes everything you need to install our new wheel-centric spacers on two wheels - ECS - Audi

Includes everything you need to install our new wheel-centric spacers on two wheels 10X Entries For Our 25th Anniversary Sweepstakes!
Designed to be used with OE wheels only

Brand:
ECS - Corporate Logo
ES#:
2788501
Mfg#:
002411ECS04A8KT2
Ships on Dec 7, 2026
ON SALE!
$134.99

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

$128.24 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cup Kit - H&R Super Sport Springs With Bilstein Sport Shocks

ES#2739505 - 50361-77KT - Cup Kit - H&R Super Sport Springs With Bilstein Sport Shocks - Aggressive looks with ultimate handling - Assembled By ECS - Audi

Aggressive looks with ultimate handling 10X Entries For Our 25th Anniversary Sweepstakes!
Fits Sedan models only

Brand:
Assembled By ECS - Corporate Logo
ES#:
2739505
Mfg#:
50361-77KT
Ships on Sep 18, 2026
Auto Notify
$1353.99

This product was last offered at the strikethrough price on
05-22-2026

$1273.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Cup Kit - H&R OE Sport Springs With Bilstein Sport Shocks

ES#3010022 - 50361-55kt - Cup Kit - H&R OE Sport Springs With Bilstein Sport Shocks - Perfect combination of handling & ride quality - Assembled By ECS - Audi

Perfect combination of handling & ride quality 10X Entries For Our 25th Anniversary Sweepstakes!
Fits Sedan models only

Brand:
Assembled By ECS - Corporate Logo
ES#:
3010022
Mfg#:
50361-55KT
Ships on Sep 18, 2026
Auto Notify
$1353.99

This product was last offered at the strikethrough price on
05-22-2026

$1273.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front Adjustable Sway Bar (32mm)

ES#2028 - 70368 - Front Adjustable Sway Bar (32mm) - Upgrade your suspension - H&R - Audi

Upgrade your suspension 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
H&R - Corporate Logo
ES#:
2028
Mfg#:
70368
Back Ordered
10% off MSRP

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

$469.00

This product was last offered at the strikethrough price on
07-01-2026

$422.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Bilstein B12 Pro-Kit Suspension System

ES#4390688 - 46-275349 - 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 vehicles with production date up to 7/11/2016 with 53mm front strut body without factory Electronic Damping Control.

Brand:
Bilstein - Corporate Logo
ES#:
4390688
Mfg#:
46-275349
Ships in 3 Business Days
$1250.00 USD
Free Shipping

Adjustable Damping Performance Coilover System - Audi B8/B8.5 & Thrust Arm Monoball Upgrade (M12 Ball Joints)

ES#4750975 - 025412ECS01EBKT - Adjustable Damping Performance Coilover System - Audi B8/B8.5 & Thrust Arm Monoball Upgrade (M12 Ball Joints) - Take control of your ride while going low with our sport-tuned coilover system! - Enthusiast Bundles - Audi

Take control of your ride while going low with our sport-tuned coilover system! Don't See A Bundle You Want - Give Us A Call Or Chat - We Will Make One!

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4750975
Mfg#:
025412ECS01EBKT
In Stock
ON SALE! SAVE 33%
$1872.98

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

$1249.99 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.

Let us help you find the parts that fit your Audi

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