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Audi S4 Performance Parts & Upgrades

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RS4 K04 Turbocharger - Left

ES#4140512 - 53049880025 - RS4 K04 Turbocharger - Left - Does not include hardware - BorgWarner - Audi

Does not include hardware Does NOT include hardware or the RS4/modified intake pipes necessary for a complete install - For a bolt-on solution, please see 034Motorsport's inlet pipe kit 034-145-P002 (ES2864575).

Brand:
BorgWarner - Corporate Logo
ES#:
4140512
Mfg#:
53049880025
In Stock
$1529.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 A4 / S4 Flat Side Skirts - Gloss Black

ES#4163869 - 001734la01 - Audi B9 A4 / S4 Flat Side Skirts - Gloss Black - Enhance your side profile with an aggressive look! - ECS - Audi

Enhance your side profile with an aggressive look! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
4163869
Mfg#:
001734LA01
In Stock
ON SALE! SAVE 20%
$363.99

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

$291.19 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

IE Race Series FDS Intercooler System - B9/B9.5 S4/S5

ES#4698448 - IETPCK5 - IE Race Series FDS Intercooler System - B9/B9.5 S4/S5 - Increase horsepower and eliminate heatsoak - 280% larger than stock core! - Integrated Engineering - Audi

Increase horsepower and eliminate heatsoak - 280% larger than stock core! Requires IE Aluminum Charge Pipe Kit for installation (ES4685216)

Brand:
Integrated Engineering - Corporate Logo
ES#:
4698448
Mfg#:
IETPCK5
In Stock
$1414.99 USD
Free Shipping

Performance Baffled Oil Catch Can System - Audi B8 S4/S5 3.0T

ES#3142968 - 016632ecs01KT - Performance Baffled Oil Catch Can System - Audi B8 S4/S5 3.0T - Keep your B8 S4/S5 3.0T intake tract clean and carbon free - ECS - Audi

Keep your B8 S4/S5 3.0T intake tract clean and carbon free 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3142968
Mfg#:
016632ECS01KT
In Stock
ON SALE! SAVE 20%
$682.99

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

$546.39 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Luft-Technik B9 S4 Front Mount Intercooler

ES#3537699 - 019219ecs01aKT - Luft-Technik B9 S4 Front Mount Intercooler - Reduce restrictions and increase cooling! - ECS - Audi

Reduce restrictions and increase cooling! 10X Entries Into Our F80 M3 Sweepstakes

For Pre-Facelift Models Only up to 11/08/2021

Brand:
ECS - Corporate Logo
ES#:
3537699
Mfg#:
019219ECS01AKT
In Stock
ON SALE! SAVE 15%
$742.99

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

$631.54 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

EA839 High Pressure Fuel Pump Piston Upgrade Kit

ES#4623625 - 034-106-6054 - EA839 High Pressure Fuel Pump Piston Upgrade Kit - Unlock up to 37% more flow over the factory high pressure fuel pump! - 034Motorsport - Audi Porsche

Unlock up to 37% more flow over the factory high pressure fuel pump! 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
4623625
Mfg#:
034-106-6054
Back Ordered
$396.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

KW V3 Series Coilover Kit

ES#2092354 - 35210075 - KW V3 Series Coilover Kit - The ultimate in coilover technology featuring double adjustable dampening - KW Suspension - Audi

The ultimate in coilover technology featuring double adjustable dampening Fits sedan models without factory EDC. Range of lowering is 0.8-1.5" in the front and 0.4-1.5" in the rear.

Brand:
KW Suspension - Corporate Logo
ES#:
2092354
Mfg#:
35210075
Ships in 5 Business Days
$3394.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Dynamic+ Lowering Springs

ES#3491530 - 034-404-1005 - Dynamic+ Lowering Springs - Engineered to improve handling and deliver superb ride quality! - 034Motorsport - Audi

Engineered to improve handling and deliver superb ride quality! 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
3491530
Mfg#:
034-404-1005
In Stock
$345.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

B9 S4 3.0T Center X-Pipe

ES#3521607 - 024365ecs01KT - B9 S4 3.0T Center X-Pipe - Sound great and save weight! Eliminate the center resonator on your OE system for a more aggressive exhaust note - ECS - Audi

Sound great and save weight! Eliminate the center resonator on your OE system for a more aggressive exhaust note 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3521607
Mfg#:
024365ECS01KT
In Stock
ON SALE! SAVE 25%
$438.99

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

$329.24 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

034Motorsport Dynamic+ Sway Bar Kit

ES#4643528 - 034-402-1035 - 034Motorsport Dynamic+ Sway Bar Kit - Designed to reduce body roll, improve turn-in, reduce understeer and enhance steering feel - 034Motorsport - Audi

Designed to reduce body roll, improve turn-in, reduce understeer and enhance steering feel 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
4643528
Mfg#:
034-402-1035
In Stock
$717.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Heat Exchanger Kit - Bolt-On - Performance Multi-Pass - Black

ES#4442371 - PMPHX30T40TBLACK - Heat Exchanger Kit - Bolt-On - Performance Multi-Pass - Black - Installation of this kit is now easier than ever, without the need of removing the crash bar to drill holes for bracket mounting. - JH Motorsports - Audi

Installation of this kit is now easier than ever, without the need of removing the crash bar to drill holes for bracket mounting.

Brand:
JH Motorsports - Corporate Logo
ES#:
4442371
Mfg#:
PMPHX30T40TBLACK
In Stock
$699.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Bilstein B16 PSS9 Suspension System

ES#4420 - 48-086165 - 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#:
4420
Mfg#:
48-086165
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.

$3423.00

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

$2369.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B8.5 S4 / A4 S-Line Carbon Fiber Rear Diffuser

ES#3085916 - 018359ECS01A - Audi B8.5 S4 / A4 S-Line Carbon Fiber Rear Diffuser - Hand-laid carbon fiber to upgrade your exterior styling - ECS - Audi

Hand-laid carbon fiber to upgrade your exterior styling 10X Entries Into Our F80 M3 Sweepstakes

From the 2013 model year

Brand:
ECS - Corporate Logo
ES#:
3085916
Mfg#:
018359ECS01A
In Stock
ON SALE! SAVE 10%
$1019.99

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

$917.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Bilstein B12 Pro-Kit Suspension System

ES#2983800 - 46-183330 - 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
For Vehicles Without Electronic Suspension
Lowers 35mm front, 30mm rear

Brand:
Bilstein - Corporate Logo
ES#:
2983800
Mfg#:
46-183330
In Stock
17% off MSRP

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

$1155.00

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

$959.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Adjustable Front Sway Bar End Link Set - Audi B8/Porsche Macan

ES#3176605 - 003112ECS01 - Adjustable Front Sway Bar End Link Set - Audi B8/Porsche Macan - Attaches sway bar to control arm, adjustable to increase clearance between sway bar and axles. Offers just under 2" of adjustability! - ECS - Audi Porsche

Attaches sway bar to control arm, adjustable to increase clearance between sway bar and axles. Offers just under 2" of adjustability! 10X Entries Into Our F80 M3 Sweepstakes
Minimum length of 157MM. Maximum length of 205MM

Brand:
ECS - Corporate Logo
ES#:
3176605
Mfg#:
003112ECS01
In Stock
ON SALE! SAVE 25%
$224.99

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

$168.74 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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