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Audi S4 Performance Suspension Parts & Upgrades

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Front Performance Air Ride Kit

ES#3972075 - 78571 - Front Performance Air Ride Kit - Allow your B9 Audi to sit on the ground! - Air Lift - Audi

Allow your B9 Audi to sit on the ground! For vehicles with 48.5mm front lower mounts

Brand:
Air Lift - Corporate Logo
ES#:
3972075
Mfg#:
78571
Ships in 5 Business Days
$1386.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cup Kit - H&R Springs With Koni Shocks & Struts

ES#2593892 - 50310KT - Cup Kit - H&R Springs With Koni Shocks & Struts - Unrivaled comfort and performance. Average lowering of 1.2"F 1.2"R - Assembled By ECS - Audi

Unrivaled comfort and performance. Average lowering of 1.2"F 1.2"R 10X Entries For Our 25th Anniversary Sweepstakes!
Cabrio models only

Brand:
Assembled By ECS - Corporate Logo
ES#:
2593892
Mfg#:
50310KT
Ships in 4 Business Days
$1281.99

This product was last offered at the strikethrough price on
07-01-2026

$1221.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Cup Kit - H&R Springs With Koni Shocks & Struts

ES#2593890 - 29257KT - Cup Kit - H&R Springs With Koni Shocks & Struts - Unrivaled comfort and performance. Average lowering of 1.2"F 1.2"R - Assembled By ECS - Audi

Unrivaled comfort and performance. Average lowering of 1.2"F 1.2"R 10X Entries For Our 25th Anniversary Sweepstakes!
Avant models only

Brand:
Assembled By ECS - Corporate Logo
ES#:
2593890
Mfg#:
29257KT
Ships in 4 Business Days
$1281.99

This product was last offered at the strikethrough price on
07-01-2026

$1221.99 USD
This product is lifetime replacement eligible Lifetime Replacement

BR Series Coilover Suspension Kit - Extreme Low

ES#3675621 - S-05E-BR - BR Series Coilover Suspension Kit - Extreme Low - 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 Please allow 4-6 weeks for build time

Brand:
BC Racing - Corporate Logo
ES#:
3675621
Mfg#:
S-05E-BR
Ships on Sep 14, 2026
$1345.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

DS Series Coilover Suspension Kit

ES#4872465 - S-05-DS - DS Series Coilover Suspension Kit - Featuring 30 levels of adjustment and increased damping force at low speed piston velocities - BC Racing - Audi

Featuring 30 levels of adjustment and increased damping force at low speed piston velocities

Brand:
BC Racing - Corporate Logo
ES#:
4872465
Mfg#:
S-05-DS
Ships on Sep 14, 2026
$1445.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

EMMOTION Rear Sway Bar - 22.2mm

ES#3199952 - EMD-B9Q-RSB - EMMOTION Rear Sway Bar - 22.2mm - Reduce body roll with this new sway bar from Emmanuele Design - Emmanuele Design - Audi

Reduce body roll with this new sway bar from Emmanuele Design

Brand:
Emmanuele Design - Corporate Logo
ES#:
3199952
Mfg#:
EMD-B9Q-RSB
Ships in 2 Business Days
$285.00 USD

Traction-S Performance Lowering Springs

ES#4475546 - LS-TS-AI-0008-B - Traction-S Performance Lowering Springs - Average lowering of 0.6" front and 0.6" rear - GODSPEED - Audi

Average lowering of 0.6" front and 0.6" rear

Brand:
GODSPEED - Corporate Logo
ES#:
4475546
Mfg#:
LS-TS-AI-0008-B
Ships in 8 Business Days
$200.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

IE Rear Sway Bar Upgrade

ES#5375239 - IESUCZ3 - IE Rear Sway Bar Upgrade - Direct bolt-in replacement with adjustable stiffness for reduced body roll and increased grip! - Integrated Engineering - Audi

Direct bolt-in replacement with adjustable stiffness for reduced body roll and increased grip! 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Integrated Engineering - Corporate Logo
ES#:
5375239
Mfg#:
IESUCZ3
Ships in 5 Business Days
$459.99 USD
This product is lifetime replacement eligible Lifetime Replacement

IE Adjustable Rear Sway End Links

ES#5375238 - IESSCK5 - IE Adjustable Rear Sway End Links - Provides tight, responsive handling for any ride height from stock to slammed - Integrated Engineering - Audi

Provides tight, responsive handling for any ride height from stock to slammed 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Integrated Engineering - Corporate Logo
ES#:
5375238
Mfg#:
IESSCK5
Ships in 5 Business Days
$249.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

IE Front Sway Bar Upgrade

ES#5375241 - IESUCZ1 - IE Front Sway Bar Upgrade - Direct bolt-in replacement with adjustable stiffness for reduced body roll and increased grip! - Integrated Engineering - Audi

Direct bolt-in replacement with adjustable stiffness for reduced body roll and increased grip! 5X Entries For Our 25th Anniversary Sweepstakes!
This front sway bar must be paired with the matching iE SQ5 Rear Sway Bar (IESUCZ3)

Brand:
Integrated Engineering - Corporate Logo
ES#:
5375241
Mfg#:
IESUCZ1
Ships in 5 Business Days
$459.99 USD
This product is lifetime replacement eligible Lifetime Replacement

KW V3 Series Coilover Kit

ES#2102369 - 35210078 - 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 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#:
2102369
Mfg#:
35210078
Ships in 5 Business Days
$3394.00 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

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Manufacturer names and/or part numbers are used only for identification purposes.

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