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Audi A4 Performance Parts & Upgrades

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Ferrea Performance Valve Spring & Retainer Kit

ES#4305347 - KT4025 - Ferrea Performance Valve Spring & Retainer Kit - Rev higher and increase your RPMs safely! - Ferrea - Audi Volkswagen

Rev higher and increase your RPMs safely!

Brand:
Ferrea - Corporate Logo
ES#:
4305347
Mfg#:
KT4025
In Stock at Vendor
$889.99

This product was last offered at the strikethrough price on
11-04-2026

$847.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

1145 Sport Suspension Kit

ES#3218931 - 11451128 - 1145 Sport Suspension Kit - Features Eibach Sport Springs and Koni Sport shocks for maximum street or track performance! - Koni - Audi

Features Eibach Sport Springs and Koni Sport shocks for maximum street or track performance! Fits avant models only

Brand:
Koni - Corporate Logo
ES#:
3218931
Mfg#:
11451128
Back Ordered
ON SALE! SAVE 20%
$1058.99

This product was last offered at the strikethrough price on
10-31-2026

$847.05 USD

Turbosmart BOV Kompact Plumb Back-25mm

ES#3149384 - TS-0203-1222 - Turbosmart BOV Kompact Plumb Back-25mm - Bolt-in replacement for your factory plastic valve - TurboSmart - Audi Volkswagen

Bolt-in replacement for your factory plastic valve

Brand:
TurboSmart - Corporate Logo
ES#:
3149384
Mfg#:
TS-0203-1222
In Stock at Vendor
10% off MSRP

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

$186.99

This product was last offered at the strikethrough price on
11-06-2026

$168.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

EMD Wheel Spacers - 10mm (Pair)

ES#4042988 - EMD-SPACER-10571 - EMD Wheel Spacers - 10mm (Pair) - Exclusively built for your 57.1mm centerbore VW/Audi - Emmanuele Design - Audi Volkswagen

Exclusively built for your 57.1mm centerbore VW/Audi

Brand:
Emmanuele Design - Corporate Logo
ES#:
4042988
Mfg#:
EMD-SPACER-10571
In Stock
$70.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

EMD Auto 10mm Wheel Spacers - Pair

ES#4042989 - EMD-SPACER-10665 - EMD Auto 10mm Wheel Spacers - Pair - Manufactured out of high quality 6061-T6 aluminum, and black anodized for corrosion resistance - 5x112, 66.5 Center Bore - Emmanuele Design - Audi

Manufactured out of high quality 6061-T6 aluminum, and black anodized for corrosion resistance - 5x112, 66.5 Center Bore

Brand:
Emmanuele Design - Corporate Logo
ES#:
4042989
Mfg#:
EMD-SPACER-10665
Ships in 3 Business Days
$70.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Bilstein B12 Pro-Kit Suspension System

ES#2983852 - 46-188496 - 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! 10X Entries Into Our F80 M3 Sweepstakes
2X Entries For Our Spin To Win Sweepstakes!
For Sedan models with Manual transmission.

Brand:
Bilstein - Corporate Logo
ES#:
2983852
Mfg#:
46-188496
Special Order: No Guaranteed ETA
$839.00 USD
Free Shipping

Front V5 Slotted Brake Rotors - Set (320x30)

ES#4668217 - 8K0615301A-S - Front V5 Slotted Brake Rotors - Set (320x30) - Precision manufactured for consistent stopping power during high performance driving. Featuring a matte black zinc coating for corrosion protection. - ECS - Audi

Precision manufactured for consistent stopping power during high performance driving. Featuring a matte black zinc coating for corrosion protection. 10X Entries Into Our F80 M3 Sweepstakes USE CODE ECS20 IN CART FOR BEST PRICE

Brand:
ECS - Corporate Logo
ES#:
4668217
Mfg#:
8K0615301A-S
Ships in 6 Business Days
$439.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS Lightweight Crank Pulley - Black

ES#3184669 - 002480ECS01 - ECS Lightweight Crank Pulley - Black - Less rotational mass means more power - ECS - Audi Volkswagen

Less rotational mass means more power 10X Entries Into Our F80 M3 Sweepstakes USE CODE ECS20 IN CART FOR BEST PRICE

Engine codes AEB & ATW

Brand:
ECS - Corporate Logo
ES#:
3184669
Mfg#:
002480ECS01
In Stock
Limited Qty Sale
$170.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear BBK (Big Brake Kit), JHM 300mm (11.8") for B5 A4-S4

ES#4046029 - BBK-1022x300x22 - Rear BBK (Big Brake Kit), JHM 300mm (11.8") for B5 A4-S4 - Finally a low cost rear Big Brake Kit - JH Motorsports - Audi

Finally a low cost rear Big Brake Kit Requires S4 rear calipers and caliper hangers to do this conversion

Brand:
JH Motorsports - Corporate Logo
ES#:
4046029
Mfg#:
BBK-1022X300X22
Ships on Nov 23, 2026
$824.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Bilstein B6 Heavy Duty Shocks & Struts Kit

ES#3031667 - 24-145961kt - Bilstein B6 Heavy Duty Shocks & Struts Kit - Performance shocks for OE springs - Bilstein - Audi

Performance shocks for OE springs 10X Entries Into Our F80 M3 Sweepstakes

Vehicles equipped with Electronic Damping Control (EDC) will lose shock dampening and receive a system error code

Brand:
Bilstein - Corporate Logo
ES#:
3031667
Mfg#:
24-145961KT
In Stock
$1042.99

This product was last offered at the strikethrough price on
07-29-2026

$820.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Revo B9 TFSI Intercooler

ES#4499832 - RA841M100000 - Revo B9 TFSI Intercooler - Only The Driven know that the cooler the air, the more power produced. - REVO - Audi

Only The Driven know that the cooler the air, the more power produced.

Brand:
REVO - Corporate Logo
ES#:
4499832
Mfg#:
RA841M100000
Back Ordered
$819.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

RaceChip RS + App

ES#4694836 - 923572 - RaceChip RS + App - Get up to +41HP and +68lb-ft through a safe and easy to use tuning module from RaceChip - Race Chip - Audi

Get up to +41HP and +68lb-ft through a safe and easy to use tuning module from RaceChip

Brand:
Race Chip - Corporate Logo
ES#:
4694836
Mfg#:
923572
Ships in 6 Business Days
$408.00 USD
Free Shipping

Rennline 10mm Wheel Spacers - Black (Pair)

ES#4755582 - LS23.10MM - Rennline 10mm Wheel Spacers - Black (Pair) - Improve the look of your vehicle with spacers - Rennline - Audi Porsche

Improve the look of your vehicle with spacers

Brand:
Rennline - Corporate Logo
ES#:
4755582
Mfg#:
LS23.10MM
Ships in 6 Business Days
$136.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Carbon Fiber Engine Cover Kit

ES#3509780 - 016308ECS01-04KT - Carbon Fiber Engine Cover Kit - Add a flash of style and elegance under your hood with an ECS Tuning Carbon Fiber Engine Cover - ECS - Audi

Add a flash of style and elegance under your hood with an ECS Tuning Carbon Fiber Engine Cover 10X Entries Into Our F80 M3 Sweepstakes USE CODE ECS20 IN CART FOR BEST PRICE

Brand:
ECS - Corporate Logo
ES#:
3509780
Mfg#:
016308ECS01-04KT
Ships in 1-2 days
$454.80

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

$452.92 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Ferrea Valve Spring/Retainer Kit

ES#2794059 - FERFSISRKIT - Ferrea Valve Spring/Retainer Kit - Valve springs and retainers are a MUST for high revving engines! - Ferrea - Audi Volkswagen

Valve springs and retainers are a MUST for high revving engines!

Brand:
Ferrea - Corporate Logo
ES#:
2794059
Mfg#:
FERFSISRKIT
Back Ordered
$813.99 USD
Free Shipping
on orders $49 and up
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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