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Audi S4 Performance Parts & Upgrades

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BR Series Coilover Suspension Kit

ES#3521686 - S-02-BR - BR Series Coilover Suspension Kit - Featuring 30 levels of adjustment and performance spring rates and valving - BC Racing - Audi

Featuring 30 levels of adjustment and performance spring rates and valving For sedan models only

Brand:
BC Racing - Corporate Logo
ES#:
3521686
Mfg#:
S-02-BR
In Stock
$1195.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B5 A4/S4 Solo-Werks S1 Coilovers

ES#2777310 - s1au004 - Audi B5 A4/S4 Solo-Werks S1 Coilovers - Set your vehicle low and tight for optimal performance - Solo-Werks - Audi

Set your vehicle low and tight for optimal performance Lowering front: 1.5" - 3", rear: 1.5" - 3"

Brand:
Solo-Werks - Corporate Logo
ES#:
2777310
Mfg#:
S1AU004
In Stock
$649.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

2.7T Silicone Boost Hose Kit - Black

ES#2800108 - 003558ECS01AKT - 2.7T Silicone Boost Hose Kit - Black - Add a better flowing, stronger set of hoses to your vehicle and keep it running strong. - ECS - Audi

Add a better flowing, stronger set of hoses to your vehicle and keep it running strong. 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
2800108
Mfg#:
003558ECS01AKT
In Stock
ON SALE! SAVE 25%
$379.99

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

$284.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

CTS Street Sport Engine Mount - Priced Each

ES#4070107 - CTS-EM-B8-50D - CTS Street Sport Engine Mount - Priced Each - 50 Durometer rubber construction - Single engine mount - CTS - Audi

50 Durometer rubber construction - Single engine mount *Priced as one single mount*

Brand:
CTS - Corporate Logo
ES#:
4070107
Mfg#:
CTS-EM-B8-50D
Ships in 7 Business Days
ON SALE! SAVE 20%
$199.99

This product was last offered at the strikethrough price on
09-29-2026

$159.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Density Line Lower Control Arm Kit

ES#3183551 - 034-401-1021 - Density Line Lower Control Arm Kit - Upgraded rubber bushings to offer a substantial performance increase over the worn factory parts - 034Motorsport - Audi

Upgraded rubber bushings to offer a substantial performance increase over the worn factory parts 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
3183551
Mfg#:
034-401-1021
In Stock
$414.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS 18Z 6-Piston Performance Brake Caliper - Pair

ES#4845288 - 056430LA01 - ECS 18Z 6-Piston Performance Brake Caliper - Pair - Enhance braking performance & complete your big brake kit! Direct replacement for OEM Porsche 18Z (95535142122, 95535142222). - ECS - Audi Volkswagen Porsche

Enhance braking performance & complete your big brake kit! Direct replacement for OEM Porsche 18Z (95535142122, 95535142222). 10X Entries Into Our F80 M3 Sweepstakes
For Vehicles Equipped with ECS Stage 5 Front Big Brake Kit (ES#1896)

Brand:
ECS - Corporate Logo
ES#:
4845288
Mfg#:
056430LA01
In Stock
ON SALE! SAVE 20%
$866.99

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

$693.59 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Conical Seat Stud Conversion Kit

ES#2804054 - 001467ECS01KT3 - Conical 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
For use with conical seat wheels and up to 10mm spacers only

Brand:
ECS - Corporate Logo
ES#:
2804054
Mfg#:
001467ECS01KT3
In Stock
ON SALE! SAVE 10%
$201.99

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

$181.79 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

RS4 Engine Mount - Priced Each

ES#2816259 - 8D0199379AD - RS4 Engine Mount - Priced Each - Upgrade to more durable mounts with no modifications necessary - Hamburg Tech - Audi Volkswagen

Upgrade to more durable mounts with no modifications necessary We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2816259
Mfg#:
8D0199379AD
In Stock
$83.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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

ES#2748194 - ECS10157KTWBC1 - ECS Wheel Spacer & Bolt Kit - 15mm 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 Into Our F80 M3 Sweepstakes
Fits most aftermarket wheels that require conical seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2748194
Mfg#:
ECS10157KTWBC1
In Stock
ON SALE! SAVE 15%
$164.99

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

$140.24 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Density Line Front Upper Strut Mount - Priced Each

ES#2966732 - 034-601-1003-TD - Density Line Front Upper Strut Mount - Priced Each - Approximately twice as stiff as stock, for increased firmness and vehicle control - 034Motorsport - Audi

Approximately twice as stiff as stock, for increased firmness and vehicle control 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
2966732
Mfg#:
034-601-1003-TD
In Stock
$46.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front Position Rear Differential Mount Insert Kit

ES#2992519 - 008288ECS01 - Front Position Rear Differential Mount Insert Kit - Decrease differential slop for better drivetrain response! - ECS - Audi Porsche

Decrease differential slop for better drivetrain response! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
2992519
Mfg#:
008288ECS01
In Stock
ON SALE! SAVE 25%
$95.99

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

$71.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Billet R1 Diverter Valve - Priced Each

ES#8818 - DV100001 - Billet R1 Diverter Valve - Priced Each - Less maintenance, more boost - APR - Audi Volkswagen Porsche

Less maintenance, more boost Call In Or Chat For Best Price!

2 required

Brand:
APR - Corporate Logo
ES#:
8818
Mfg#:
DV100001
Ships in 6 Business Days
ON SALE! SAVE 10%
$291.99

This product was last offered at the strikethrough price on
09-28-2026

$262.76 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Hi-Volume Fuel Pump Upgrade Kit

ES#3146299 - 10-127-101K - Hi-Volume Fuel Pump Upgrade Kit - Up to a 5% Torque increase and additional 10Bar of fuel rail pressure! - Autotech - Audi Volkswagen

Up to a 5% Torque increase and additional 10Bar of fuel rail pressure!

Brand:
Autotech - Corporate Logo
ES#:
3146299
Mfg#:
10-127-101K
In Stock
$339.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 A4 S-Line / S4 Grille Accent Set - Gloss Black

ES#3991472 - 028800ECS01 - Audi B9 A4 S-Line / S4 Grille Accent Set - Gloss Black - Upgrade your exterior styling - ECS - Audi

Upgrade your exterior styling 10X Entries Into Our F80 M3 Sweepstakes

Fits up to 2019 model year with *pre-facelift* front bumpers

Brand:
ECS - Corporate Logo
ES#:
3991472
Mfg#:
028800ECS01
In Stock
ON SALE! SAVE 20%
$292.99

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

$234.39 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ECS Performance Engine Mount Kit - B6/B7 S4/RS4

ES#2708157 - 000805ECS02AKT - ECS Performance Engine Mount Kit - B6/B7 S4/RS4 - Performance engine mounts to increase drivetrain rigidity - ECS - Audi

Performance engine mounts to increase drivetrain rigidity 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
2708157
Mfg#:
000805ECS02AKT
In Stock
ON SALE! SAVE 15%
$418.99

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

$356.14 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

IE HPFP Internal Upgrade Kit

ES#4706078 - iefuvz1KT - IE HPFP Internal Upgrade Kit - The largest volume possible piston and cylinder design to unlock fuel delivery for hybrid turbos and Stage 1/2 Plus ECU tunes. - Integrated Engineering - Audi

The largest volume possible piston and cylinder design to unlock fuel delivery for hybrid turbos and Stage 1/2 Plus ECU tunes.

Brand:
Integrated Engineering - Corporate Logo
ES#:
4706078
Mfg#:
IEFUVZ1KT
In Stock
$448.99 USD
Free Shipping
on orders $49 and up

More About Performance Parts & Upgrades

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