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Audi S4 Performance Parts & Upgrades

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Audi 3.0T Carbon Fiber Engine Cover Kit - Red

ES#3623934 - 015339ecs02aKT - Audi 3.0T Carbon Fiber Engine Cover Kit - Red - Add a touch of red carbon/kevlar to your stock engine cover! - ECS - Audi

Add a touch of red carbon/kevlar to your stock engine cover! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3623934
Mfg#:
015339ECS02AKT
In Stock
ON SALE! SAVE 52%
$401.99

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

$192.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

RS4 K04 Turbochargers

ES#4164822 - 5304988002526KT3 - RS4 K04 Turbochargers - Includes the left (K04-025) & right (K04-026) side turbochargers - BorgWarner - Audi

Includes the left (K04-025) & right (K04-026) side turbochargers affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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#:
4164822
Mfg#:
5304988002526KT3
Ships in 2 Business Days
$3070.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

DRA Series Wheel Spacers (Black) - 25mm (1 Pair)

ES#2695897 - 5055571SW - DRA Series Wheel Spacers (Black) - 25mm (1 Pair) - Fine tune your stance and improve handling - H&R - Audi Volkswagen

Fine tune your stance and improve handling 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!

Brand:
H&R - Corporate Logo
ES#:
2695897
Mfg#:
5055571SW
In Stock
$169.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Motorsport TrackSport Engine Mount Pair

ES#2993008 - 034-509-0047 - Motorsport TrackSport Engine Mount Pair - Density line rubber damping to maximize strength and durability - 034Motorsport - Audi

Density line rubber damping to maximize strength and durability affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
2993008
Mfg#:
034-509-0047
Back Ordered
$611.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

V2 Series Coilover Kit - With EDC Deactivation Kit

ES#2619624 - 15210097 - V2 Series Coilover Kit - With EDC Deactivation 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
Fits sedan models with 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#:
2619624
Mfg#:
15210097
Ships in 10 Business Days
$3024.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

H&R Sport Spring & Bilstein Sport Shocks - Cup Kit

ES#629 - 29477-1BSC - H&R Sport Spring & Bilstein Sport Shocks - Cup Kit - Perfect combination of handing & ride quality - Assembled By ECS - Audi

Perfect combination of handing & 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#:
629
Mfg#:
29477-1BSC
Ships in 4 Business Days
$1129.99

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

$1004.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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

ES#4723527 - 002411ECS03AKBKT - Wheel Spacer & Bolt Kit - 15mm With Black Ball Seat Bolts - Complete kit for two wheels, includes everything you need to install spacers - ECS - Audi

Complete kit for two wheels, includes everything you need to install spacers affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Fits OEM wheels, or wheels that use OEM ball seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
4723527
Mfg#:
002411ECS03AKBKT
Ships on Jul 9, 2026
Auto Notify
ON SALE! SAVE 30%
$186.99

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

$130.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Stainless Steel Bi-Pipe Set - Wrinkle Black

ES#3183538 - 034-108-5001-BLK - Stainless Steel Bi-Pipe Set - Wrinkle Black - Replace your restrictive OEM Audi bipipes with 034Motorsport's High-Flow Bi-pipe Set for the 2.7T! - 034Motorsport - Audi

Replace your restrictive OEM Audi bipipes with 034Motorsport's High-Flow Bi-pipe Set for the 2.7T! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3183538
Mfg#:
034-108-5001-BLK
Ships in 3 Business Days
$301.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Carbon Fiber Trunk Spoiler - Audi B9 A4/S4

ES#3141741 - 019220ECS01A - Carbon Fiber Trunk Spoiler - Audi B9 A4/S4 - Add a touch of style and real carbon fiber to your Audi - ECS - Audi

Add a touch of style and real carbon fiber to your Audi affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Requires removal of the factory trunk spoiler

Brand:
ECS - Corporate Logo
ES#:
3141741
Mfg#:
019220ECS01A
In Stock
ON SALE! SAVE 28%
$694.99

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

$500.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rennline 12mm Wheel Spacers - Black (Pair)

ES#4755583 - LS23.12MM - Rennline 12mm Wheel Spacers - Black (Pair) - Improve the look of your vehicle with spacers - Rennline - Audi Porsche

Improve the look of your vehicle with spacers affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Rennline - Corporate Logo
ES#:
4755583
Mfg#:
LS23.12MM
In Stock
$125.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

CTS Turbo Rear Sway Bar Upgrade

ES#5435522 - SUS-0010R - CTS Turbo Rear Sway Bar Upgrade - Eliminate body roll and unlock razor-sharp handling for your B8/B8.5 Audi with CTS Turbo's solid, two-way adjustable 25.4mm rear sway bar. - CTS - Audi

Eliminate body roll and unlock razor-sharp handling for your B8/B8.5 Audi with CTS Turbo's solid, two-way adjustable 25.4mm rear sway bar. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
CTS - Corporate Logo
ES#:
5435522
Mfg#:
SUS-0010R
Ships in 8 Business Days
$249.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rear 2-Piece Brake Rotors - Pair (330x22)

Replace your rotors with 2-piece rotors from Giro Disc. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Girodisc - Corporate Logo
ES#:
4608924
Mfg#:
A2-130
In Stock at Vendor
$995.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear 2-Piece Slotted Brake Rotors - Pair (330x22)

ES#4429974 - 034-301-2008 - Rear 2-Piece Slotted Brake Rotors - Pair (330x22) - 034Motorsport 330mmx22mm 2-Piece Floating Rear Brake Rotor Upgrade Kit - 034Motorsport - Audi

034Motorsport 330mmx22mm 2-Piece Floating Rear Brake Rotor Upgrade Kit affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
4429974
Mfg#:
034-301-2008
In Stock
$994.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Wheel Spacer & Bolt Kit - 12.5mm - With Dust Cap - with Black Conical Seat Bolts

ES#2863234 - 002403ECS02AKT4 - Wheel Spacer & Bolt Kit - 12.5mm - With Dust Cap - with Black Conical 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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2863234
Mfg#:
002403ECS02AKT4
In Stock
ON SALE! SAVE 19%
$153.99

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

$123.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B6/B7 A4/S4 Front Sway Bar & Bushing Kit - 32mm

ES#4608992 - 000601LA01KT - Audi B6/B7 A4/S4 Front Sway Bar & Bushing Kit - 32mm - 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#:
4608992
Mfg#:
000601LA01KT
In Stock
ON SALE! SAVE 20%
$370.99

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

$296.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Performance Parts & Upgrades

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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