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Audi B9 S4 Quattro 3.0T

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Audi B9 S4 Quattro 3.0T Performance Parts & Upgrades

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B8 Suspension Cup-Kit

ES#4779912 - 24-274876KT - B8 Suspension Cup-Kit - B8 Performance Plus dampers paired with H&R Sport Springs - Assembled By ECS - Audi

B8 Performance Plus dampers paired with H&R Sport Springs 10X Entries Into Our F80 M3 Sweepstakes
For vehicles with sport suspension and without electronic suspension (49mm diameter strut)

Brand:
Assembled By ECS - Corporate Logo
ES#:
4779912
Mfg#:
24-274876KT
Ships on Jan 28, 2027
$1285.00

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

$1211.99 USD
This product is lifetime replacement eligible Lifetime Replacement

APR Wheel Spacer Kit With Lug Bolts - 15mm Thick - 66.5mm CB - 45mm Bolts

ES#5504821 - KT100022 - APR Wheel Spacer Kit With Lug Bolts - 15mm Thick - 66.5mm CB - 45mm Bolts - 15mm spacers to perfectly dial in your stance or clear your big brake kit! Includes 10 wheel bolts. - APR - Audi

15mm spacers to perfectly dial in your stance or clear your big brake kit! Includes 10 wheel bolts. Call In Or Chat For Best Price!

Brand:
APR - Corporate Logo
ES#:
5504821
Mfg#:
KT100022
Back Ordered
ON SALE! SAVE 10%
$186.99

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

$167.67 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front And Rear Sport Struts With H&R Sport Springs

ES#4698702 - 82401319SPORTKT - Front And Rear Sport Struts With H&R Sport Springs - Average lowering of .80"- 1.6" front and rear - Assembled By ECS - Audi

Average lowering of .80"- 1.6" front and rear 10X Entries Into Our F80 M3 Sweepstakes
Vehicle will lose Adaptive Dampening Control

Brand:
Assembled By ECS - Corporate Logo
ES#:
4698702
Mfg#:
82401319SPORTKT
Back Ordered
$1388.99

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

$1313.99 USD
This product is lifetime replacement eligible Partial Replacement

Special Active Front And Rear Struts With H&R Sport Springs

ES#4698705 - 82451407KT - Special Active Front And Rear Struts With H&R Sport Springs - Average lowering of .80"- 1.6" front and rear - Assembled By ECS - Audi

Average lowering of .80"- 1.6" front and rear 10X Entries Into Our F80 M3 Sweepstakes
Vehicle will lose Adaptive Dampening Control

Brand:
Assembled By ECS - Corporate Logo
ES#:
4698705
Mfg#:
82451407KT
Back Ordered
$1221.99

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

$1148.99 USD
This product is lifetime replacement eligible Partial Replacement

ER Series Coilover Suspension Kit - B9 Audi A4/S4

ES#5375563 - S-28-ER - ER Series Coilover Suspension Kit - B9 Audi A4/S4 - Get the high quality, unique features of the BC Racing "BR" and "RM" series with the added benefit of an external reservoir for superior performance! - BC Racing - Audi

Get the high quality, unique features of the BC Racing "BR" and "RM" series with the added benefit of an external reservoir for superior performance! For vehicles with production date from 7/12/2016 with 48.5mm front strut body without factory Electronic Damping Control.

Brand:
BC Racing - Corporate Logo
ES#:
5375563
Mfg#:
S-28-ER
Back Ordered
$2255.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

BR Series Coilover Suspension Kit - B9 Audi A4/S4

ES#4424822 - S-28-BR - BR Series Coilover Suspension Kit - B9 Audi A4/S4 - Featuring 30 levels of adjustment and performance spring rates and valving that makes the BR Series perfect for both daily drivers and track warriors! - BC Racing - Audi

Featuring 30 levels of adjustment and performance spring rates and valving that makes the BR Series perfect for both daily drivers and track warriors! For vehicles with production date from 7/12/2016 with 48.5mm front strut body without factory Electronic Damping Control.

Brand:
BC Racing - Corporate Logo
ES#:
4424822
Mfg#:
S-28-BR
Back Ordered
$1195.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

DS Series Coilover Suspension Kit - B9 Audi A4/S4

ES#5375567 - S-27-DS - DS Series Coilover Suspension Kit - B9 Audi A4/S4 - BC Racing took the best features from their BR Series Coilover, engineered components to improve driver experience, and are proud to present the BC Racing DS series with digressive piston damping that dramatically improves suspension feel and feedback. - BC Racing - Audi

BC Racing took the best features from their BR Series Coilover, engineered components to improve driver experience, and are proud to present the BC Racing DS series with digressive piston damping that dramatically improves suspension feel and feedback. For vehicles with production date up to 7/11/2016 with 53mm front strut body without factory Electronic Damping Control.

Brand:
BC Racing - Corporate Logo
ES#:
5375567
Mfg#:
S-27-DS
Back Ordered
$1395.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

DS Series Coilover Suspension Kit - B9 Audi A4/S4

ES#5375516 - S-35-DS - DS Series Coilover Suspension Kit - B9 Audi A4/S4 - BC Racing took the best features from their BR Series Coilover, engineered components to improve driver experience, and are proud to present the BC Racing DS series with digressive piston damping that dramatically improves suspension feel and feedback. - BC Racing - Audi

BC Racing took the best features from their BR Series Coilover, engineered components to improve driver experience, and are proud to present the BC Racing DS series with digressive piston damping that dramatically improves suspension feel and feedback. For vehicles with production date up to 7/11/2016 with 53mm front strut body with factory Electronic Damping Control.

Brand:
BC Racing - Corporate Logo
ES#:
5375516
Mfg#:
S-35-DS
Back Ordered
$1395.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ER Series Coilover Suspension Kit - B9 Audi A4/S4

ES#5375566 - S-27-ER - ER Series Coilover Suspension Kit - B9 Audi A4/S4 - Get the high quality, unique features of the BC Racing "BR" and "RM" series with the added benefit of an external reservoir for superior performance! - BC Racing - Audi

Get the high quality, unique features of the BC Racing "BR" and "RM" series with the added benefit of an external reservoir for superior performance! For vehicles with production date up to 7/11/2016 with 53mm front strut body without factory Electronic Damping Control.

Brand:
BC Racing - Corporate Logo
ES#:
5375566
Mfg#:
S-27-ER
Back Ordered
$2255.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

DS Series Coilover Suspension Kit - B9 Audi A4/S4

ES#5375564 - S-28-DS - DS Series Coilover Suspension Kit - B9 Audi A4/S4 - BC Racing took the best features from their BR Series Coilover, engineered components to improve driver experience, and are proud to present the BC Racing DS series with digressive piston damping that dramatically improves suspension feel and feedback. - BC Racing - Audi

BC Racing took the best features from their BR Series Coilover, engineered components to improve driver experience, and are proud to present the BC Racing DS series with digressive piston damping that dramatically improves suspension feel and feedback. For vehicles with production date from 7/12/2016 with 48.5mm front strut body without factory Electronic Damping Control.

Brand:
BC Racing - Corporate Logo
ES#:
5375564
Mfg#:
S-28-DS
Back Ordered
$1395.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Sport Shocks & Struts Set

ES#4698699 - 82411317sportKT - Sport Shocks & Struts Set - Tighten up your Audi with these Koni struts - Koni - Audi

Tighten up your Audi with these Koni struts Vehicle will lose Adaptive Dampening Control

Brand:
Koni - Corporate Logo
ES#:
4698699
Mfg#:
82411317SPORTKT
Back Ordered
$899.99

This product was last offered at the strikethrough price on
08-13-2026

$898.99 USD

Revo Big Brake Kit - Red - (380x32)

ES#4499828 - RA841B200600 - Revo Big Brake Kit - Red - (380x32) - The Revo Big Brake Kit comes complete with everything required to upgrade your stopping power. - REVO - Audi

The Revo Big Brake Kit comes complete with everything required to upgrade your stopping power.

Brand:
REVO - Corporate Logo
ES#:
4499828
Mfg#:
RA841B200600
Back Ordered
$3339.00 USD
This product is lifetime replacement eligible Lifetime Replacement

Supersprint Cat-Back Exhaust System - Non-Resonated

ES#4017775 - 777512KT - Supersprint Cat-Back Exhaust System - Non-Resonated - Stainless steel non-resonated cat-back exhaust system with quad round, polished tips - Includes secondary cat delete downpipes - Supersprint - Audi

Stainless steel non-resonated cat-back exhaust system with quad round, polished tips - Includes secondary cat delete downpipes

Brand:
Supersprint - Corporate Logo
ES#:
4017775
Mfg#:
777512KT
Back Ordered
$7659.99 USD
Free Shipping

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All the performance upgrade options from the best brands in the business to help build your dreams. Our performance parts catalog is the largest anywhere and constantly growing to keep your build on track.

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