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Audi A4 Performance Parts & Upgrades

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Wheel Spacer Kit - 5mm (1 Pair)

ES#3570107 - MS100152 - Wheel Spacer Kit - 5mm (1 Pair) - 5mm spacers to perfectly dial in your stance or clear your big brake kit! - APR - Audi Volkswagen

5mm spacers to perfectly dial in your stance or clear your big brake kit! Call In Or Chat For Best Price! 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
APR - Corporate Logo
ES#:
3570107
Mfg#:
MS100152
Ships in 5 Business Days
ON SALE! SAVE 12%
$81.99

This product was last offered at the strikethrough price on
06-24-2026

$71.95 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Unitronic Performance Software - Flashed @ ECS

ES#4464243 - 1.8T-B5-B6 - Unitronic Performance Software - Flashed @ ECS - Choose the stage that meets your power goals! - Unitronic - Audi Volkswagen

Choose the stage that meets your power goals! This tune requires the vehicle to be dropped off at ECS Tuning's facility in Ohio and picked up the next

Brand:
Unitronic - Corporate Logo
ES#:
4464243
Mfg#:
1.8T-B5-B6
In Stock
Starting at $500.00 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rear Sway Bar End Links - Pair

ES#4701565 - ELA-012 - Rear Sway Bar End Links - Pair - Eliminate rubber to improve handling and response - Verkline - Audi Volkswagen

Eliminate rubber to improve handling and response

Brand:
Verkline - Corporate Logo
ES#:
4701565
Mfg#:
ELA-012
Ships in 2 Business Days
$250.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

CTS Turbo Rear Sway Bar Upgrade

ES#5435526 - SUS-0011R - CTS Turbo Rear Sway Bar Upgrade - Transform your B9/B9.5 Audi's handling and crush body roll with CTS Turbo's solid 22.5mm rear sway bar, featuring two-way adjustability up to 214% stiffer than stock. - CTS - Audi

Transform your B9/B9.5 Audi's handling and crush body roll with CTS Turbo's solid 22.5mm rear sway bar, featuring two-way adjustability up to 214% stiffer than stock.

Brand:
CTS - Corporate Logo
ES#:
5435526
Mfg#:
SUS-0011R
Ships in 8 Business Days
$249.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

RaceChip GTS

ES#4339407 - 917513 - RaceChip GTS - Get up to +43 hp and +63 lb-ft through a safe and easy to use tuning module from RaceChip - Race Chip - Audi Volkswagen

Get up to +43 hp and +63 lb-ft through a safe and easy to use tuning module from RaceChip For vehicles up through the 2013 model year only

Brand:
Race Chip - Corporate Logo
ES#:
4339407
Mfg#:
917513
Ships in 4 Business Days
$499.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Lightweight Steel Flywheel (16lbs)

ES#2576184 - SA01S - Lightweight Steel Flywheel (16lbs) - Unleash hidden power by reducing rotational mass - Spec Clutches - Audi

Unleash hidden power by reducing rotational mass For use with Spec clutch kits only

Brand:
Spec Clutches - Corporate Logo
ES#:
2576184
Mfg#:
SA01S
Ships in 4 Business Days
$499.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Stage 1.5

Average gain of 50 horsepower and 85 lb-ft of torque on 93 Octane @ 18 PSI

Brand:
Tunezilla - Corporate Logo
ES#:
3097349
Mfg#:
FSI-20T-1+
Ships in 8 Business Days
$499.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rear Exact-Fit Stainless Steel Brake Lines

ES#8828 - ecs41010kt - Rear Exact-Fit Stainless Steel Brake Lines - Rear set of DOT-compliant lines for an improved pedal feel - ECS - Audi

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

Up to VIN 8D-V-168350, split is in the 1997 model year

Brand:
ECS - Corporate Logo
ES#:
8828
Mfg#:
ECS41010KT
In Stock
ON SALE! SAVE 25%
$94.99

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

$71.24 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Performance Rear Sway Bar End Links

ES#3183670 - MRS-AU-0130 - Performance Rear Sway Bar End Links - Replace the flimsy stock plastic and rubber units - Megan Racing - Audi

Replace the flimsy stock plastic and rubber units

Brand:
Megan Racing - Corporate Logo
ES#:
3183670
Mfg#:
MRS-AU-0130
Ships in 5 Business Days
$165.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Big Brake Upgrade (300x22)

ES#2973093 - 034-306-0001 - Rear Big Brake Upgrade (300x22) - Upgrade to 300mm rear brake rotors from the B6/B7 S4 models. - 034Motorsport - Audi

Upgrade to 300mm rear brake rotors from the B6/B7 S4 models. Does not include rotors - To be used with 300x22 rear rotors from the B6/B7 S4 models

Brand:
034Motorsport - Corporate Logo
ES#:
2973093
Mfg#:
034-306-0001
Back Ordered
$247.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS Wheel Spacers - 4mm (Pair)

ES#250683 - 002403ECS01A04Kt - ECS Wheel Spacers - 4mm (Pair) - Exclusively built for your 57.1mm centerbore VW/Audi - ECS - Audi Volkswagen

Exclusively built for your 57.1mm centerbore VW/Audi 10X Entries For Our 25th Anniversary Sweepstakes!
Please measure your hub protrusion to ensure it will still make contact with the center of the wheel. See

Brand:
ECS - Corporate Logo
ES#:
250683
Mfg#:
002403ECS01A04KT
Ships on Oct 12, 2026
Auto Notify
ON SALE! SAVE 20%
$87.99

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

$70.39 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Carbon Fiber Engine Cover Kit & Performance Ignition Coils

ES#4751076 - 016308ECS010EBKT - Carbon Fiber Engine Cover Kit & Performance Ignition Coils - Add a flash of style and elegance under your hood with an ECS Tuning Carbon Fiber Engine Cover - Enthusiast Bundles - Audi

Add a flash of style and elegance under your hood with an ECS Tuning Carbon Fiber Engine Cover Don't See A Bundle You Want - Give Us A Call Or Chat - We Will Make One!

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4751076
Mfg#:
016308ECS010EBKT
Ships in 1-2 days
ON SALE! SAVE 15%
$577.14

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

$490.33 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Performance Front Sway Bar Kit

ES#2708113 - 70477KT - Performance Front Sway Bar Kit - Includes H&R's 32mm sway bar with installation hardware - H&R - Audi

Includes H&R's 32mm sway bar with installation hardware 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
H&R - Corporate Logo
ES#:
2708113
Mfg#:
70477KT
Ships in 4 Business Days
$533.99

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

$487.99 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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Manufacturer names and/or part numbers are used only for identification purposes.

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