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Audi S4 Performance Parts & Upgrades

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Billet Aluminum Single-Mass Lightweight Flywheel

ES#3998858 - 034-503-1023 - Billet Aluminum Single-Mass Lightweight Flywheel - Weighing in at 13 lbs, allows for faster revving and easier rev matching when downshifting. - 034Motorsport - Audi

Weighing in at 13 lbs, allows for faster revving and easier rev matching when downshifting. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3998858
Mfg#:
034-503-1023
Ships in 3 Business Days
$792.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS Wheel Spacers - 5mm (Pair)

ES#250706 - 002403ECS01A05KT - ECS Wheel Spacers - 5mm (Pair) - Exclusively built for your 57.1mm centerbore VW/Audi - ECS - Audi Volkswagen

Exclusively built for your 57.1mm centerbore VW/Audi affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Please measure your hub protrusion to ensure it will still make contact with the center of the wheel. See

Brand:
ECS - Corporate Logo
ES#:
250706
Mfg#:
002403ECS01A05KT
In Stock
ON SALE! SAVE 29%
$87.29

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

$61.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Motorsport Rear Sway Bar End Links

ES#2864592 - 034-402-4007 - Motorsport Rear Sway Bar End Links - Replace the flimsy stock plastic and rubber units. - 034Motorsport - Audi Porsche

Replace the flimsy stock plastic and rubber units. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
2864592
Mfg#:
034-402-4007
In Stock
$243.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Non-Resonated

ES#2827261 - SSXAU048 - Cat-Back Exhaust System - Non-Resonated - 2.25" stainless steel with quad 76.2mm polished tips - Milltek Sport - Audi

2.25" stainless steel with quad 76.2mm polished tips affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Milltek Sport - Corporate Logo
ES#:
2827261
Mfg#:
SSXAU048
Ships in 2 Business Days
$1577.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 A4/S4 Front Lip Spoiler With Trunk Spoiler

ES#4750957 - 028802ECSEBKT - Audi B9 A4/S4 Front Lip Spoiler With Trunk Spoiler - Upgrade your exterior styling! - Enthusiast Bundles - Audi

Upgrade your exterior styling! Don't See A Bundle You Want - Give Us A Call Or Chat - We Will Make One! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits up to 2019 model year with *pre-facelift* front bumpers

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4750957
Mfg#:
028802ECSEBKT
In Stock
ON SALE! SAVE 32%
$655.78

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

$449.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Stage 4 FX400 Clutch Kit

ES#2828972 - 02029HDC6 - Stage 4 FX400 Clutch Kit - Features the Power Plus I Pressure Plate with a 6-puck ceramic disc - 170% increased holding capacity - Clutch Masters - Audi

Features the Power Plus I Pressure Plate with a 6-puck ceramic disc - 170% increased holding capacity affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Recommended to be used with Clutch Masters steel (FW-029-SF) or aluminum (FW-029-AL) flywheels

Brand:
Clutch Masters - Corporate Logo
ES#:
2828972
Mfg#:
02029HDC6
Ships in 3 Business Days
15% off MSRP

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

$922.99

This product was last offered at the strikethrough price on
06-09-2026

$784.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Tubular Front Subframe

ES#4701692 - WAS-510 - Tubular Front Subframe - Increases chassis rigidity for improved handling performance and eliminates subframe shifting - Verkline - Audi

Increases chassis rigidity for improved handling performance and eliminates subframe shifting affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Verkline - Corporate Logo
ES#:
4701692
Mfg#:
WAS-510
Ships on Jun 25, 2026
$1569.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Performance Cat-Back Exhaust System

ES#3107059 - 140403 - Performance Cat-Back Exhaust System - 2.5" stainless steel with quad 3.5" polished stainless tips - Borla - Audi

2.5" stainless steel with quad 3.5" polished stainless tips affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Borla - Corporate Logo
ES#:
3107059
Mfg#:
140403
Ships on Jun 25, 2026
$3130.99 USD
Free Shipping

034Motorsport Wheel Spacer Pair - 20mm

ES#3546625 - 034-604-7007 - 034Motorsport Wheel Spacer Pair - 20mm - Increase track width to improve handling, allow for more brake clearance, and help achieve a flush wheel/tire fitment - 034Motorsport - Audi

Increase track width to improve handling, allow for more brake clearance, and help achieve a flush wheel/tire fitment affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3546625
Mfg#:
034-604-7007
In Stock
$125.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 3.0T S4 S5 Catted Downpipe

ES#4905571 - B930TDPC - Audi B9 3.0T S4 S5 Catted Downpipe - Increased Power and Torque, Massive 6.5" Design, Faster Turbo Spool, and Improved Exhaust Note - ARM Motorsports - Audi

Increased Power and Torque, Massive 6.5" Design, Faster Turbo Spool, and Improved Exhaust Note affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
ARM Motorsports - Corporate Logo
ES#:
4905571
Mfg#:
B930TDPC
Ships in 4 Business Days
$779.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Resonated

ES#2827388 - SSXAU262 - Cat-Back Exhaust System - Resonated - 2.37" stainless steel with dual oval black Cerakote tips - Milltek Sport - Audi

2.37" stainless steel with dual oval black Cerakote tips affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Up to the 2012 model year

Brand:
Milltek Sport - Corporate Logo
ES#:
2827388
Mfg#:
SSXAU262
Ships in 4 Business Days
$3105.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

034Motorsport Res-X Resonator Delete

ES#3426667 - 034-105-7040 - 034Motorsport Res-X Resonator Delete - Unleashes a throaty growl and exotic tone that exudes the sound of performance - 034Motorsport - Audi

Unleashes a throaty growl and exotic tone that exudes the sound of performance affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3426667
Mfg#:
034-105-7040
In Stock
$443.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 S4/S5 Eventuri Intake System - Black Carbon

ES#3604844 - EVE-B9S5-CF-INT - Audi B9 S4/S5 Eventuri Intake System - Black Carbon - Developed to give less restrictive airflow to the turbo while maintaining low inlet temperatures - Optimum performance, precise fitment, and bespoke style! - Eventuri - Audi

Developed to give less restrictive airflow to the turbo while maintaining low inlet temperatures - Optimum performance, precise fitment, and bespoke style! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Eventuri - Corporate Logo
ES#:
3604844
Mfg#:
EVE-B9S5-CF-INT
Ships in 6 Business Days
$1550.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Premium Performance Coilover

ES#1303510 - 39471-1 - Premium Performance Coilover - Ultra lightweight aluminum performance kit. Average lowering of 1.6"-2.5"F 1.3"-2.0"R - H&R - Audi

Ultra lightweight aluminum performance kit. Average lowering of 1.6"-2.5"F 1.3"-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 models only

Brand:
H&R - Corporate Logo
ES#:
1303510
Mfg#:
39471-1
Ships in 4 Business Days
$1549.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Performance Lightweight Flywheel Clutch Kit - Stage 2 Endurance & Driveshaft Center Support

ES#4751549 - 003886ECS01EBKT - Performance Lightweight Flywheel Clutch Kit - Stage 2 Endurance & Driveshaft Center Support - ECS Lightweight Flywheel with a Southbend Stage 2 clutch kit rated at 430ft/lbs - Enthusiast Bundles - Audi

ECS Lightweight Flywheel with a Southbend Stage 2 clutch kit rated at 430ft/lbs Don't See A Bundle You Want - Give Us A Call Or Chat - We Will Make One! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4751549
Mfg#:
003886ECS01EBKT
Back Ordered
Auto Notify
ON SALE! SAVE 13%
$3563.80

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

$3099.00 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Stage 3 Clutch Kit - With Lightweight Aluminum Flywheel (12lbs)

ES#1329 - B5S4S3CKFW - Stage 3 Clutch Kit - With Lightweight Aluminum Flywheel (12lbs) - Includes hardware and all related components. - Assembled By ECS - Audi

Includes hardware and all related components. 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#:
1329
Mfg#:
B5S4S3CKFW
Ships in 8 Business Days
$1565.99

This product was last offered at the strikethrough price on
06-09-2026

$1546.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Performance Parts & Upgrades

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