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Audi S4 Performance Parts & Upgrades

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Transmission Mount Insert

ES#4620259 - 8K0399151DB - Transmission Mount Insert - Enhance your driving experience by filling the bushing void. - JH Motorsports - Audi

Enhance your driving experience by filling the bushing void. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
JH Motorsports - Corporate Logo
ES#:
4620259
Mfg#:
8K0399151DB
In Stock
$47.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Wheel Spacer & Bolt Kit - 5mm With Conical Seat Bolts

ES#2568311 - 6-ECS-015 - Wheel Spacer & Bolt Kit - 5mm With Conical Seat Bolts - Complete kit for two wheels, comes with everything you need to install spacers on your aftermarket wheels - ECS - Audi

Complete kit for two wheels, comes with everything you need to install spacers on your aftermarket wheels affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Fits most aftermarket wheels that use conical seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2568311
Mfg#:
6-ECS-015
In Stock
ON SALE! SAVE 25%
$156.99

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

$117.74 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS Wheel Spacer & Bolt Kit - 6mm With Black Ball Seat Bolts

ES#2748185 - ECS10610KTWB1 - ECS Wheel Spacer & Bolt Kit - 6mm With Black Ball 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!
Please measure your hub protrusion to ensure it will still make contact with the center of the wheel. See

Brand:
ECS - Corporate Logo
ES#:
2748185
Mfg#:
ECS10610KTWB1
In Stock
ON SALE! SAVE 30%
$127.99

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

$89.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

JHM Stainless Steel Downpipes

2.5" stainless steel downpipes made in one piece, stopping those pesky leaks. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For models with manual transmission only.

Brand:
JH Motorsports - Corporate Logo
ES#:
4638076
Mfg#:
JHM-251
Ships in 10 Business Days
$1528.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Street Performance Coilover System

ES#3221084 - 50356-2 - Street Performance Coilover System - Finally, A performance coilover suspension system for your B9 Audi - Offering unrivaled comfort and performance! - H&R - Audi

Finally, A performance coilover suspension system for your B9 Audi - Offering unrivaled comfort and performance! 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! For vehicles with production date from 7/12/2016 with 48.5mm front strut body
For vehicles without Sport Suspension or Magnetic Ride Control

Brand:
H&R - Corporate Logo
ES#:
3221084
Mfg#:
50356-2
Ships in 4 Business Days
$1599.99

This product was last offered at the strikethrough price on
02-06-2026

$1525.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front Big Brake Kit - Stage 2 - V5 Dimpled & Slotted Rotors (345x30)

ES#4876759 - 8R0615108EDSKT - Front Big Brake Kit - Stage 2 - V5 Dimpled & Slotted Rotors (345x30) - Upgrade your brake system to the 4-piston Brembo Q5 calipers - ECS - Audi

Upgrade your brake system to the 4-piston Brembo Q5 calipers affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4876759
Mfg#:
8R0615108EDSKT
Ships in 1-2 days
$1522.99 USD
This product is lifetime replacement eligible Partial Replacement

Front Big Brake Kit - Stage 2 - Plain Rotors (345x30)

ES#2730474 - 8R0615108EKT2 - Front Big Brake Kit - Stage 2 - Plain Rotors (345x30) - Upgrade your brake system to the 4-piston Brembo Q5 calipers - ECS - Audi

Upgrade your brake system to the 4-piston Brembo Q5 calipers affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2730474
Mfg#:
8R0615108EKT2
Ships on Oct 28, 2026
Auto Notify
$1522.99 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

DRA Series Wheel Spacers - 25mm (1 Pair)

ES#348 - 50556651 - DRA Series Wheel Spacers - 25mm (1 Pair) - Want to add some stance to your car with those new wheels? Get these new spacers today - H&R - Audi Mercedes Benz Porsche

Want to add some stance to your car with those new wheels? Get these new spacers today 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#:
348
Mfg#:
50556651
Ships in 1 Business Day
$189.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

CTS B-Cool Billet Oil Filter Housing

ES#3660001 - CTS-HW-0243 - CTS B-Cool Billet Oil Filter Housing - Offering great looks and heat dissipation - Not only does the B-Cool filter look good, but it works great! - CTS - Audi

Offering great looks and heat dissipation - Not only does the B-Cool filter look good, but it works great! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
CTS - Corporate Logo
ES#:
3660001
Mfg#:
CTS-HW-0243
In Stock
$79.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Polyurethane Transmission Mounts - Red (Street) - Pair

ES#4701563 - ELA-008-75 - Polyurethane Transmission Mounts - Red (Street) - Pair - Performance mounts to increase drivetrain rigidity - Verkline - Audi

Performance mounts to increase drivetrain rigidity affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Verkline - Corporate Logo
ES#:
4701563
Mfg#:
ELA-008-75
Ships in 2 Business Days
$189.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Sway Bar - 25.4mm

ES#3183689 - MRS-AU-1991 - Rear Sway Bar - 25.4mm - Reduce body roll and increase handling! - Megan Racing - Audi

Reduce body roll and increase handling! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Megan Racing - Corporate Logo
ES#:
3183689
Mfg#:
MRS-AU-1991
Ships in 6 Business Days
$168.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Spherical Front Upper Strut Mount - Pair

ES#4304843 - B8011A0 - Spherical Front Upper Strut Mount - Pair - Upgrade your shock mounts - JXB Performance - Audi

Upgrade your shock mounts affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
JXB Performance - Corporate Logo
ES#:
4304843
Mfg#:
B8011A0
Ships in 2 Business Days
$299.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Sport Upper Control Arm Kit

ES#4830726 - CTS-SUS-3005 - Sport Upper Control Arm Kit - Combine this with our lower control arm kit for a complete rejuvenation of your front suspension components - CTS - Audi

Combine this with our lower control arm kit for a complete rejuvenation of your front suspension components affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
CTS - Corporate Logo
ES#:
4830726
Mfg#:
CTS-SUS-3005
Ships in 8 Business Days
$249.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi EA839 3.0T W.1 ECU Tune

ES#4715344 - 05-839-00131-0KT - Audi EA839 3.0T W.1 ECU Tune - Increase of +66 Horsepower, and +111 Torque! Eliminate top speed limiter, Increased throttle response. W.1 Tunes are designed for completely stock vehicles with no other modifications! - Weistec - Audi

Increase of +66 Horsepower, and +111 Torque! Eliminate top speed limiter, Increased throttle response. W.1 Tunes are designed for completely stock vehicles with no other modifications! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Weistec - Corporate Logo
ES#:
4715344
Mfg#:
05-839-00131-0KT
Ships in 1 Business Day
$1499.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

850 Strapped Series Twin Disc Clutch Kits

ES#4876008 - 02029-TDFR-X - 850 Strapped Series Twin Disc Clutch Kits - Bridge the gap between a single disc clutch and the original FX850 Twin Disc - Clutch Masters - Audi

Bridge the gap between a single disc clutch and the original FX850 Twin Disc affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Must be used with Clutch Masters Flywheel FW-029-B-TDS

Brand:
Clutch Masters - Corporate Logo
ES#:
4876008
Mfg#:
02029-TDFR-X
Ships in 8 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.

$1760.00

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

$1496.00 USD
Free Shipping

More About Performance Parts & Upgrades

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