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Audi A4 Performance Parts & Upgrades

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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 Into Our F80 M3 Sweepstakes USE CODE ECS20 IN CART FOR BEST PRICE
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
$201.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front Cross Drilled & Slotted 2-Piece Brake Rotors - Pair (380x38)

ES#2825795 - 003755ecs01a1KT - Front Cross Drilled & Slotted 2-Piece Brake Rotors - Pair (380x38) - Replacement rotors for Stage 4 Big Brake Kit (ES2825794 & ES3221498) - ECS - Audi

Replacement rotors for Stage 4 Big Brake Kit (ES2825794 & ES3221498) 10X Entries Into Our F80 M3 Sweepstakes USE CODE ECS20 IN CART FOR BEST PRICE
*Replacement rotor set for customers that have our Stage 3/4 380mm kits with Porsche 19Z calipers*

Brand:
ECS - Corporate Logo
ES#:
2825795
Mfg#:
003755ECS01A1KT
In Stock
$1383.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Stage 2 Clutch Kit - Drag

Designed for high power cars that see limited street use - Rated at 500 ft/lbs Does not include flywheel

Brand:
South Bend Clutch - Corporate Logo
ES#:
3106542
Mfg#:
K70614HDBKT
Ships in 2 Business Days
$1340.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Density Line Adjustable Rear Toe Links

ES#3236103 - 034-407-1001 - Density Line Adjustable Rear Toe Links - Allows for precision alignment and the ability to reduce tire wear on lowered vehicles! - 034Motorsport - Audi

Allows for precision alignment and the ability to reduce tire wear on lowered vehicles! 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
3236103
Mfg#:
034-407-1001
In Stock
$330.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Wheel Spacer & Bolt Kit - 5mm With Conical Seat Bolts

ES#2568311 - 6-ECS-015 - Wheel Spacer & Bolt Kit - 5mm 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 Into Our F80 M3 Sweepstakes USE CODE ECS20 IN CART FOR BEST PRICE
Fits most aftermarket wheels that use conical seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2568311
Mfg#:
6-ECS-015
Ships on Nov 23, 2026
$156.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Forged Rifle Drilled H-Beam Connecting Rods

ES#2794960 - IERHVA2RD - Forged Rifle Drilled H-Beam Connecting Rods - Set of 4, rifle drilled - Integrated Engineering - Audi Volkswagen

Set of 4, rifle drilled
Drop-In rods for use with OEM pistons, or pistons with 19mm wrist pin

Brand:
Integrated Engineering - Corporate Logo
ES#:
2794960
Mfg#:
IERHVA2RD
Ships in 5 Business Days
$657.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System

ES#3175528 - 252576T - Cat-Back Exhaust System - 2.5" T-304 Stainless Steel exhaust system with Borla mufflers - Techtonics Tuning - Audi

2.5" T-304 Stainless Steel exhaust system with Borla mufflers For use with aftermarket 2.5" downpipe

Brand:
Techtonics Tuning - Corporate Logo
ES#:
3175528
Mfg#:
252576T
Ships on Dec 1, 2026
$1314.50 USD
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 A4/S4 Front Lip Spoiler With Trunk Spoiler

ES#4745607 - 028802ecsdbKT - Audi B9 A4/S4 Front Lip Spoiler With Trunk Spoiler - Upgrade your exterior styling! - Doorbusters - Audi

Upgrade your exterior styling! For S-Line models only. Fits up to 2019 model year with *pre-facelift* front bumpers

Brand:
Doorbusters - Corporate Logo
ES#:
4745607
Mfg#:
028802ECSDBKT
In Stock
$655.78 USD
This product is lifetime replacement eligible Lifetime Replacement

Clutch Kit W/ Aluminum Flywheel (9lb) - Stage 3+

ES#2576196 - SA783FKT - Clutch Kit W/ Aluminum Flywheel (9lb) - Stage 3+ - Features a full faced, carbon semi-metallic disc with a torque rating of 550ft/lbs - Spec Clutches - Audi

Features a full faced, carbon semi-metallic disc with a torque rating of 550ft/lbs

Brand:
Spec Clutches - Corporate Logo
ES#:
2576196
Mfg#:
SA783FKT
Ships in 4 Business Days
$1310.43 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

APR Front Mount Intercooler System

ES#3028688 - IC100017 - APR Front Mount Intercooler System - Direct bolt-on upgrade for increased performance - APR - Audi

Direct bolt-on upgrade for increased performance Call In Or Chat For Best Price!

Brand:
APR - Corporate Logo
ES#:
3028688
Mfg#:
IC100017
Ships in 6 Business Days
11% off MSRP

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

$1462.99

This product was last offered at the strikethrough price on
11-05-2026

$1299.99 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 5 Business Days
$1294.00 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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