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Audi S4 Performance Parts & Upgrades

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B8 A4/S4/A5/S5 Selector Shaft Monoball & Transmission Mount Bushing Insert Kit

ES#4876600 - 048563LA02EBKT - B8 A4/S4/A5/S5 Selector Shaft Monoball & Transmission Mount Bushing Insert Kit - Eliminate the loose or sloppy feeling from your shifter and drivetrain! - Enthusiast Bundles - Audi

Eliminate the loose or sloppy feeling from your shifter and drivetrain! 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#:
4876600
Mfg#:
048563LA02EBKT
Ships on Aug 7, 2026
Auto Notify
ON SALE! SAVE 40%
$252.99

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

$152.54 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ECS Wheel Spacer & Bolt Kit - 8mm With Ball Seat Bolts

ES#251543 - ECS#244KTWBLT - ECS Wheel Spacer & Bolt Kit - 8mm With 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!
Fits OEM wheels or wheels that require ball seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
251543
Mfg#:
ECS#244KTWBLT
In Stock
ON SALE! SAVE 25%
$134.99

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

$101.24 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Stage 2 Endurance Clutch Kit

ES#3106502 - k70286hdofeKT - Stage 2 Endurance Clutch Kit - Designed for track use while still streetable. Conservatively rated at 450ft/lbs. - South Bend Clutch - Audi

Designed for track use while still streetable. Conservatively rated at 450ft/lbs. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Recommended to be used with South Bend Flywheel SBC0504

Brand:
South Bend Clutch - Corporate Logo
ES#:
3106502
Mfg#:
K70286HDOFEKT
Ships in 1 Business Day
$910.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

EMD Auto 10mm Wheel Spacers - Pair

ES#4042989 - EMD-SPACER-10665 - EMD Auto 10mm Wheel Spacers - Pair - Manufactured out of high quality 6061-T6 aluminum, and black anodized for corrosion resistance - 5x112, 66.5 Center Bore - Emmanuele Design - Audi

Manufactured out of high quality 6061-T6 aluminum, and black anodized for corrosion resistance - 5x112, 66.5 Center Bore affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Emmanuele Design - Corporate Logo
ES#:
4042989
Mfg#:
EMD-SPACER-10665
Ships in 1 Business Day
$70.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Drilled & Slotted Brake Rotors - Pair (330x22)

ES#2992304 - 127.33137KT - Rear Drilled & Slotted Brake Rotors - Pair (330x22) - Upgrade your stopping power - StopTech - Audi

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

Brand:
StopTech - Corporate Logo
ES#:
2992304
Mfg#:
127.33137KT
In Stock
$454.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

X34 Carbon Fiber Cold Air Intake System

ES#3988146 - 034-108-1013 - X34 Carbon Fiber Cold Air Intake System - Delivers improved power, sound, and acceleration to B9 Audi S4/S5 owners in a clean OEM+ package - 034Motorsport - Audi

Delivers improved power, sound, and acceleration to B9 Audi S4/S5 owners in a clean OEM+ package affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3988146
Mfg#:
034-108-1013
Ships in 2 Business Days
$908.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Unitronic Performance Software - Stage 1+

ES#4376314 - 30T-EA839-1+ - Unitronic Performance Software - Stage 1+ - Gain up to 100 horsepower and 112 lb-ft of torque on 93 Octane - Unitronic - Audi

Gain up to 100 horsepower and 112 lb-ft of torque on 93 Octane affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This tune requires the vehicle to be dropped off at ECS Tuning's facility in Ohio and picked up the next

Brand:
Unitronic - Corporate Logo
ES#:
4376314
Mfg#:
30T-EA839-1+
In Stock
$900.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Charge Pipe Kit

This includes 3 reinforced silicone hoses, and 1 aluminum charge air tube. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles that have the Wagner Competition Intercooler

Brand:
Wagner Tuning - Corporate Logo
ES#:
4017656
Mfg#:
210001120
In Stock at Vendor
$450.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

APR 3.0T Stage 1 ECU Upgrade

ES#4057386 - DPP-30T-MG1 - APR 3.0T Stage 1 ECU Upgrade - Expect massive gains with 431-480 HP with 467-549 FT-LBS of torque on tap, depending on octane, from this simple software upgrade! - APR - Audi

Expect massive gains with 431-480 HP with 467-549 FT-LBS of torque on tap, depending on octane, from this simple software upgrade! 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!
This upgrade must be performed at ECS Tuning's facility in Ohio.

Brand:
APR - Corporate Logo
ES#:
4057386
Mfg#:
DPP-30T-MG1
In Stock
$899.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear BBK (Big Brake Kit), JHM 330mm

Finally a low cost 330mm Rear Big Brake Kit affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
JH Motorsports - Corporate Logo
ES#:
4046031
Mfg#:
BBK-1023X330X22
Ships in 10 Business Days
$899.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Driveshaft Center Support Bearing Carrier

Holds the driveshaft where it should be. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with 01A, 01E, or 0A3 transmissions.

Brand:
JXB Performance - Corporate Logo
ES#:
4304955
Mfg#:
B6002A0
In Stock at Vendor
Starting at $299.99 USD
Customize
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

DR Series Wheel Spacers (Black) - 8mm (1 Pair) - Version 2

ES#4147947 - 1655572SW - DR Series Wheel Spacers (Black) - 8mm (1 Pair) - Version 2 - 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!
Fits front only

Brand:
H&R - Corporate Logo
ES#:
4147947
Mfg#:
1655572SW
In Stock
$99.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

DR Series Wheel Spacers - 8mm (1 Pair) - Version 2

ES#2537950 - 1655572 - DR Series Wheel Spacers - 8mm (1 Pair) - Version 2 - 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!
Fits front only

Brand:
H&R - Corporate Logo
ES#:
2537950
Mfg#:
1655572
Ships in 3 Business Days
$99.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Clutch Kit - Stage 2+

ES#2586456 - SA443H - Clutch Kit - Stage 2+ - Features a full faced, multi-friction disc with a torque rating of 540 ft/lbs - Spec Clutches - Audi

Features a full faced, multi-friction disc with a torque rating of 540 ft/lbs affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Spec Clutches - Corporate Logo
ES#:
2586456
Mfg#:
SA443H
Ships in 3 Business Days
$899.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Build Your Own Power Package - Audi B9 S4 3.0T

Go from mild to wild! Select the options you want for your build. 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#:
4017052
Mfg#:
B9S4PWRPK
Ships on Nov 19, 2026
ON SALE!
Starting at $0.00 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Mishimoto Baffled Oil Catch - Kit

ES#4493209 - MMBCC-S4-18PBE - Mishimoto Baffled Oil Catch - Kit - Help reduce potential detonation, carbon buildup on intake valves and protect from oil blow-by. - Mishimoto - Audi

Help reduce potential detonation, carbon buildup on intake valves and protect from oil blow-by. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Mishimoto - Corporate Logo
ES#:
4493209
Mfg#:
MMBCC-S4-18PBE
In Stock at Vendor
$445.99 USD
Free Shipping
on orders $49 and up
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.

Let us help you find the parts that fit your Audi

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Manufacturer names and/or part numbers are used only for identification purposes.

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