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Audi S4 Performance Parts & Upgrades

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Density Line Front Upper Control Arm Kit

ES#3199968 - 034-401-1042 - Density Line Front Upper Control Arm Kit - Refresh your front end with 034Motorsport's front upper control arm kit - 034Motorsport - Audi Porsche

Refresh your front end with 034Motorsport's front upper control arm kit 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
3199968
Mfg#:
034-401-1042
In Stock
$337.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

RacingLine Oil Catch Can System - B9 S4/S5/SQ5

ES#4620271 - VWR131000 - RacingLine Oil Catch Can System - B9 S4/S5/SQ5 - Features a complete PCV replacement block feeding to an internally-baffled can to eliminate oil-build-up in the intercooler and inlet tract - Racingline - Audi

Features a complete PCV replacement block feeding to an internally-baffled can to eliminate oil-build-up in the intercooler and inlet tract

Brand:
Racingline - Corporate Logo
ES#:
4620271
Mfg#:
VWR131000
Ships in 2 Business Days
$1117.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Audi B8 S4 / A4 S-Line Rear Diffuser - Gloss Black

ES#4033487 - 028808ECS01 - Audi B8 S4 / A4 S-Line Rear Diffuser - Gloss Black - Add some aggressive styling to your Audi! - ECS - Audi

Add some aggressive styling to your Audi! 10X Entries Into Our F80 M3 Sweepstakes

Fits pre-facelift B8 models only

Brand:
ECS - Corporate Logo
ES#:
4033487
Mfg#:
028808ECS01
In Stock
ON SALE! SAVE 25%
$420.99

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

$315.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Bilstein B16 PSS9 Suspension System

ES#2593713 - 48-105958 - Bilstein B16 PSS9 Suspension System - Height adjustable suspension system offering adjustable compression and rebound to dial in for competition, comfort, or anywhere in between. World-famous Bilstein quality with a limited lifetime warranty! - Bilstein - Audi

Height adjustable suspension system offering adjustable compression and rebound to dial in for competition, comfort, or anywhere in between. World-famous Bilstein quality with a limited lifetime warranty! 10X Entries Into Our F80 M3 Sweepstakes
2X Entries For Our Spin To Win Sweepstakes!

Brand:
Bilstein - Corporate Logo
ES#:
2593713
Mfg#:
48-105958
In Stock
31% off MSRP

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

$3467.00

This product was last offered at the strikethrough price on
10-18-2026

$2399.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS Wheel Spacer & Bolt Kit - 10mm With Black Ball Seat Bolts

ES#2748191 - 00240302A10KT3 - ECS Wheel Spacer & Bolt Kit - 10mm With Black Ball 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

Brand:
ECS - Corporate Logo
ES#:
2748191
Mfg#:
00240302A10KT3
In Stock
ON SALE! SAVE 25%
$197.93

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

$148.45 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

VW MK8 2.0T / Audi 3.0T Diverter Valve Spacer - Clear Anodized

ES#4033242 - 028495ECS01 - VW MK8 2.0T / Audi 3.0T Diverter Valve Spacer - Clear Anodized - Let your turbo blow off some air for an exhilarating driving experience! - ECS - Audi Volkswagen

Let your turbo blow off some air for an exhilarating driving experience! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
4033242
Mfg#:
028495ECS01
In Stock
ON SALE! SAVE 25%
$89.99

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

$67.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

B5 A4 / S4 Quattro Adjustable Damping Coilovers

ES#4474069 - 000703LA01 - B5 A4 / S4 Quattro Adjustable Damping Coilovers - Features 32 way adjustable damping, variable length and zinc-coated shock bodies - ECS - Audi

Features 32 way adjustable damping, variable length and zinc-coated shock bodies 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
4474069
Mfg#:
000703LA01
In Stock
ON SALE! SAVE 24%
$1049.99

This product was last offered at the strikethrough price on
05-02-2026

$799.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

3.0T 207mm Supercharger Crank Pulley Upgrade Kit

ES#4883431 - 053844la01KT - 3.0T 207mm Supercharger Crank Pulley Upgrade Kit - "Dual pulley" gains without the hassle! Easily increase supercharger RPM by 22% and support up to 550HP. - ECS - Audi Volkswagen Porsche

"Dual pulley" gains without the hassle! Easily increase supercharger RPM by 22% and support up to 550HP. 10X Entries Into Our F80 M3 Sweepstakes
For use with OEM (63.25mm) Supercharger Pulley.
"Stage 2" Software Required for Compatibility

Brand:
ECS - Corporate Logo
ES#:
4883431
Mfg#:
053844LA01KT
Ships on Nov 3, 2026
ON SALE! SAVE 20%
$419.99

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

$335.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Sport Springs - Set

ES#251841 - 50361 - Sport Springs - Set - Unrivaled comfort and performance. Average lowering of 1.5"F 1.5"R - H&R - Audi

Unrivaled comfort and performance. Average lowering of 1.5"F 1.5"R We Price Match - Give Us A Call or Chat!

Brand:
H&R - Corporate Logo
ES#:
251841
Mfg#:
50361
In Stock
15% off MSRP

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

$439.00

This product was last offered at the strikethrough price on
10-01-2026

$373.15 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

B9 A4 / S4 Lowering Spring Set

ES#4714528 - 051204LA01-A - B9 A4 / S4 Lowering Spring Set - Dramatically improve looks and handling with and average lowering up to 1.5" front and rear. - ECS - Audi

Dramatically improve looks and handling with and average lowering up to 1.5" front and rear. 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
4714528
Mfg#:
051204LA01-A
In Stock
ON SALE! SAVE 10%
$315.99

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

$284.39 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Super Sport Springs - Set

ES#1303564 - 50361-77 - Super Sport Springs - Set - Aggressive looks and ultimate handling. Average lowering of 2.0"F 2.0"R - H&R - Audi

Aggressive looks and ultimate handling. Average lowering of 2.0"F 2.0"R We Price Match - Give Us A Call or Chat!

Brand:
H&R - Corporate Logo
ES#:
1303564
Mfg#:
50361-77
In Stock
15% off MSRP

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

$439.00

This product was last offered at the strikethrough price on
10-01-2026

$373.15 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Bilstein B14 PSS Suspension System

ES#2984041 - 47-119444 - Bilstein B14 PSS Suspension System - Height adjustable suspension system with performance valving and application specific, progressive rate coil springs. World-famous Bilstein quality with a limited lifetime warranty! - Bilstein - Audi

Height adjustable suspension system with performance valving and application specific, progressive rate coil springs. World-famous Bilstein quality with a limited lifetime warranty! 10X Entries Into Our F80 M3 Sweepstakes
Dynamic Ride Control (DRC) must be removed. Fits sedan, avant, and cabriolet models

Brand:
Bilstein - Corporate Logo
ES#:
2984041
Mfg#:
47-119444
In Stock
31% off MSRP

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

$1791.00

This product was last offered at the strikethrough price on
10-18-2026

$1239.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rear V5 Drilled & Slotted Brake Rotors - Set (330x22)

ES#4668331 - 4H0615601Q-XS - Rear V5 Drilled & Slotted Brake Rotors - Set (330x22) - 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

Brand:
ECS - Corporate Logo
ES#:
4668331
Mfg#:
4H0615601Q-XS
In Stock
ON SALE!
$302.99

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

$293.90 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Performance High-Flow Air Intake System - 6" Velocity Stack

ES#4045629 - CTS-IT-290R - Performance High-Flow Air Intake System - 6" Velocity Stack - Designed to work in conjunction with the OEM air scoop to seamlessly force cold air into the system - Flowed through a massive 6" velocity stack filter! - CTS - Audi

Designed to work in conjunction with the OEM air scoop to seamlessly force cold air into the system - Flowed through a massive 6" velocity stack filter!

Brand:
CTS - Corporate Logo
ES#:
4045629
Mfg#:
CTS-IT-290R
Ships in 6 Business Days
ON SALE! SAVE 15%
$299.99

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

$254.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front RedStuff Performance Brake Pad Set

ES#4031309 - DP32277C - Front RedStuff Performance Brake Pad Set - High performance street pad featuring Kevlar technology. - EBC - Audi

High performance street pad featuring Kevlar technology. 2X Entries Into Our F80 M3 Sweepstakes

Brand:
EBC - Corporate Logo
ES#:
4031309
Mfg#:
DP32277C
In Stock
$203.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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

ES#2748193 - ECS10157KTWB1 - ECS Wheel Spacer & Bolt Kit - 15mm With Black Ball 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 OEM wheels or wheels that require ball seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2748193
Mfg#:
ECS10157KTWB1
In Stock
ON SALE! SAVE 20%
$174.99

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

$139.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Performance Parts & Upgrades

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