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Audi S4 Performance Parts & Upgrades

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ES#4266266 - 18-309-180WK - Wavetrac Rear Differential  - Upgrade your vehicles differential! - Wavetrac - Audi

Upgrade your vehicles differential! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Wavetrac - Corporate Logo
ES#:
4266266
Mfg#:
18-309-180WK
Ships in 2 Business Days
$1495.00 USD
Free Shipping
on orders $49 and up
ES#2210294 - B8LPLED - LED License Plate Light Assemblies - Keep your plate illuminated brilliantly with new plate light LED's - ZiZa - Audi

Keep your plate illuminated brilliantly with new plate light LED's affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Does not fit vehicles with factory LED license plate lights

Brand:
ZiZa - Corporate Logo
ES#:
2210294
Mfg#:
B8LPLED
In Stock
ON SALE! SAVE 10%
$71.99

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

$64.79 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4164715 - B6S4NONRESONATED - Cat-Back Exhaust System - Non-Resonated - 2.25" stainless steel with your choice of tip style - Milltek Sport - Audi

2.25" stainless steel with your choice of tip style affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Milltek Sport - Corporate Logo
ES#:
4164715
Mfg#:
B6S4NONRESONATED
Ships in 3 Business Days
Starting at $1486.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3677912 - 078903137BL - Performance Kevlar Reinforced Accessory Belt - Our Red Kevlar accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. - ECS - Audi
ECS Tuning recommends this product.

Our Red Kevlar accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3677912
Mfg#:
078903137BL
In Stock
$50.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2568232 - ECS10157KTWBC -  ECS Wheel Spacer & Bolt Kit - 15mm With 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!
Fits most aftermarket wheels that require conical seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2568232
Mfg#:
ECS10157KTWBC
In Stock
ON SALE! SAVE 20%
$167.99

This product was last offered at the strikethrough price on
06-13-2026

$134.39 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3570111 - MS100156 - Wheel Spacer Kit - 10mm (1 Pair)  - 10mm spacers to perfectly dial in your stance or clear your big brake kit! - APR - Audi Volkswagen

10mm spacers to perfectly dial in your stance or clear your big brake kit! Call In Or Chat For Best Price! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
APR - Corporate Logo
ES#:
3570111
Mfg#:
MS100156
In Stock
12% off MSRP

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

$138.99

This product was last offered at the strikethrough price on
06-18-2026

$122.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3678259 - 034-404-Z001 - Dynamic+ Coil Spring Sleeves - Pair - These coil spring sleeves are from high-durometer rubber to withstand up to 2,000 pounds of load. - 034Motorsport - Audi Volkswagen

These coil spring sleeves are from high-durometer rubber to withstand up to 2,000 pounds of load. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3678259
Mfg#:
034-404-Z001
Ships in 6 Business Days
$16.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#2602129 - 02029HDC4KT - Stage 4 Clutch Kit W/ Flywheel - Featuring a 4 puck ceramic disc and 12lb aluminum flywheel - Assembled By ECS - Audi

Featuring a 4 puck ceramic disc and 12lb aluminum flywheel 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#:
2602129
Mfg#:
02029HDC4KT
Ships in 3 Business Days
$1490.99

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

$1471.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3644159 - 777512 - Performance Downpipe Kit - Non-Resonated  - T304 Stainless Steel high flow front pipe kit replaces factory secondary catalytic converters - Supersprint - Audi

T304 Stainless Steel high flow front pipe kit replaces factory secondary catalytic converters affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Supersprint - Corporate Logo
ES#:
3644159
Mfg#:
777512
Ships in 3 Business Days
$1466.99 USD
Free Shipping
ES#3195650 - 019386ECS01 - Billet Hood Latch Release Handle  - Billet aluminum hood release handle replacement for the plastic OEM hood pull - ECS - Audi Volkswagen

Billet aluminum hood release handle replacement for the plastic OEM hood pull affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3195650
Mfg#:
019386ECS01
In Stock
ON SALE! SAVE 52%
$103.99

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

$50.17 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2723181 - 000805ECS03AKT - Complete ECS Performance Engine Mount Kit - Audi B5 S4 - Includes ECS performance polyurethane engine mount and snub mount - ECS - Audi

Includes ECS performance polyurethane engine mount and snub mount affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2723181
Mfg#:
000805ECS03AKT
Ships in 1-2 days
ON SALE! SAVE 10%
$402.99

This product was last offered at the strikethrough price on
06-13-2026

$362.69 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4464978 - CI100043C3 - APR Carbon Fiber Intake System - Audi B9 S4/S5 3.0T (CI100043) - Looks as great as it performs - APR - Audi

Looks as great as it performs Call In Or Chat For Best Price! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
APR - Corporate Logo
ES#:
4464978
Mfg#:
CI100043C3
Ships in 6 Business Days
11% off MSRP

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

$1631.99

This product was last offered at the strikethrough price on
06-18-2026

$1449.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4046122 - JHM-SBLK1310 - Front & Rear Stainless Steel Brake Line Kit - High-Quality, DOT approved stainless brake lines to replace the factory hoses on your S4 - JH Motorsports  - Audi

High-Quality, DOT approved stainless brake lines to replace the factory hoses on your S4 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
JH Motorsports  - Corporate Logo
ES#:
4046122
Mfg#:
JHM-SBLK1310
Ships in 2 Business Days
$144.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4317662 - 4M0698231A - Brake Pad Guide Kit - Hardware required to install new front pads. - Genuine Volkswagen Audi - Audi

Hardware required to install new front pads. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4317662
Mfg#:
4M0698231A
In Stock
24% off MSRP

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

$30.26

This product was last offered at the strikethrough price on
02-23-2026

$22.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2876924 - 034-601-1002-TD - Density Line Front Upper Strut Mount - Priced Each - 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#:
2876924
Mfg#:
034-601-1002-TD
In Stock
$45.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3468833 - 034-402-4024 - Adjustable Rear Sway Bar End Links - Adjust preload on the sway bar, as well as alleviate any sway bar
clearance issues caused by lowering your car - 034Motorsport - Audi

Adjust preload on the sway bar, as well as alleviate any sway bar clearance issues caused by lowering your car affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3468833
Mfg#:
034-402-4024
In Stock
$288.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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