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Audi S4 Performance Suspension Parts & Upgrades

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KW Street Comfort Coilover Kit

Street Comfort coilovers offer sport handling with adjustable ride height affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles without electronic damping.

Brand:
KW Suspension - Corporate Logo
ES#:
2951371
Mfg#:
18010075KT
Back Ordered
$2494.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Street Performance Coilover Kit

ES#2019 - 29250-1 - Street Performance Coilover Kit - Unrivaled comfort and performance. Average lowering of 1.2"-2.1"F 1.0"-2.0"R - H&R - Audi

Unrivaled comfort and performance. Average lowering of 1.2"-2.1"F 1.0"-2.0"R affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
Fits Sedan And Avant Models

Brand:
H&R - Corporate Logo
ES#:
2019
Mfg#:
29250-1
Ships in 3 Business Days
$1440.99

This product was last offered at the strikethrough price on
02-03-2026

$1244.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Sport Springs - Set

ES#2017 - 50314 - Sport Springs - Set - Unrivaled comfort and performance. Average lowering of 1.2"F 1.0"R - H&R - Audi

Unrivaled comfort and performance. Average lowering of 1.2"F 1.0"R affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
Fits Sedan models only

Brand:
H&R - Corporate Logo
ES#:
2017
Mfg#:
50314
In Stock
$246.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cup Kit - H&R Sport Springs With Bilstein Sport Shocks

ES#2739504 - 50361KT - Cup Kit - H&R Sport Springs With Bilstein Sport Shocks - Perfect combination of handling & ride quality - Assembled By ECS - Audi

Perfect combination of handling & ride quality affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
2739504
Mfg#:
50361KT
Ships on Sep 3, 2026
Auto Notify
$1395.99

This product was last offered at the strikethrough price on
05-22-2026

$1199.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B6/B7 A4/S4 Front 32mm & Rear 25mm Sway Bar Kit

ES#4609000 - 000601LA01FRKT - Audi B6/B7 A4/S4 Front 32mm & Rear 25mm Sway Bar Kit - Reduce body roll and enhance handling! - ECS - Audi

Reduce body roll and enhance handling! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4609000
Mfg#:
000601LA01FRKT
In Stock
ON SALE! SAVE 40%
$659.99

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

$395.51 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Heavy Duty Rubber Rear Shock Mount & Installation Kit

ES#4821250 - 049327LA01KT - Heavy Duty Rubber Rear Shock Mount & Installation Kit - Enhance longevity and improve your Audi's handling with our in-house designed HD rubber shock mount! - ECS - Audi Volkswagen

Enhance longevity and improve your Audi's handling with our in-house designed HD rubber shock mount! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4821250
Mfg#:
049327LA01KT
In Stock
ON SALE! SAVE 25%
$133.99

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

$100.16 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Schwaben Wheel Mount Kit & Magnetic Caster/Camber Gauge

ES#3129514 - 010891sch01aKT - Schwaben Wheel Mount Kit & Magnetic Caster/Camber Gauge - Perform your own caster and camber adjustments with this professional kit - Schwaben - Audi BMW Volkswagen Mercedes Benz MINI Porsche
ECS Tuning recommends this product.

Perform your own caster and camber adjustments with this professional kit affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Schwaben - Corporate Logo
ES#:
3129514
Mfg#:
010891SCH01AKT
In Stock
ON SALE!
$403.99

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

$383.78 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

RSS+ Coilover System - Damping Adjustable Shocks

ES#2718830 - RSS13019-1 - RSS+ Coilover System - Damping Adjustable Shocks - Ultimate motorsport coilover - Average lowering 1.5"-2.7"F 1.4"-2.7"R - H&R - Audi

Ultimate motorsport coilover - Average lowering 1.5"-2.7"F 1.4"-2.7"R affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
Vehicles equipped with Electronic Damping Control (EDC) will lose shock damping and receive a system error code with coilover systems.

Brand:
H&R - Corporate Logo
ES#:
2718830
Mfg#:
RSS13019-1
Ships in 3 Business Days
$2265.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

KW V2 Series Coilover Kit

ES#2092106 - 15210032 - KW V2 Series Coilover Kit - Variant 2 coilovers offer sport handling with adjustable rebound dampening - KW Suspension - Audi

Variant 2 coilovers offer sport handling with adjustable rebound dampening affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Range of lowering is 1.5-2.9" in the front and rear.

Brand:
KW Suspension - Corporate Logo
ES#:
2092106
Mfg#:
15210032
Back Ordered
$2264.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Density Line Front Upper Strut Mount - Pair

ES#3622332 - 034-601-1002-tKT - Density Line Front Upper Strut Mount - Pair - 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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3622332
Mfg#:
034-601-1002-TKT
In Stock
$90.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 Billet Tunnel Brace - Black

ES#3476922 - 023781ECS01-01 - Audi B9 Billet Tunnel Brace - Black - Replace your small and weak stamped brace with heavy-duty billet aluminum! - ECS - Audi

Replace your small and weak stamped brace with heavy-duty billet aluminum! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3476922
Mfg#:
023781ECS01-01
In Stock
ON SALE! SAVE 20%
$164.99

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

$131.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Sport Shocks & Struts Kit

ES#2631383 - 82401279SPORTKT - Sport Shocks & Struts Kit - Tighten up your Audi with these Koni Yellow shocks & struts - Koni - Audi

Tighten up your Audi with these Koni Yellow shocks & struts affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Koni - Corporate Logo
ES#:
2631383
Mfg#:
82401279SPORTKT
In Stock at Vendor
ON SALE! SAVE 20%
$932.99

This product was last offered at the strikethrough price on
02-27-2026

$743.94 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

KW V1 Series Coilover Kit

ES#2102302 - 10210078 - KW V1 Series Coilover Kit - Variant 1 coilovers offer the best balance between sporty driving and comfort - KW Suspension - Audi

Variant 1 coilovers offer the best balance between sporty driving and comfort affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits avant 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#:
2102302
Mfg#:
10210078
Back Ordered
$2194.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

V1 Series Coilover System

ES#3020359 - 10210065 - V1 Series Coilover System - The best balance between sporty driving and comfort - KW Suspension - Audi

The best balance between sporty driving and comfort affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits cabriolet and avant models only.
For avant and convertible models only. Range of lowering is 0.4-1.5" in the front and rear.

Brand:
KW Suspension - Corporate Logo
ES#:
3020359
Mfg#:
10210065
Back Ordered
$2094.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

220MM Coilover Damping Extensions

ES#4872123 - 004673LA01 - 220MM Coilover Damping Extensions - Adjust your damping without removing your interior! - ECS - Audi BMW Volkswagen MINI Porsche

Adjust your damping without removing your interior! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
10X Entries For Our Spin To Win Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4872123
Mfg#:
004673LA01
In Stock
ON SALE! SAVE 10%
$36.99

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

$33.29 USD
Free Shipping
on orders $49 and up

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! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3236103
Mfg#:
034-407-1001
Ships in 2 Business Days
$330.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Performance Suspension Parts & Upgrades

Your car's performance and ride quality are effectively determined by your suspension. Find all the replacement and upgrade solutions for your dampers, springs, control arms, and more in our suspension catalog.

Let us help you find the parts that fit your Audi

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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