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Audi B9 S4 Quattro 3.0T

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Audi B9 S4 Quattro 3.0T Performance Parts & Upgrades

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M14 Titanium Wheel Stud Kit - Raw - Set Of 20

ES#4487743 - TISTUD20145RAW - M14 Titanium Wheel Stud Kit - Raw - Set Of 20 - M14x1.5x75mm with conical nuts - Vargas Turbo Technologies - Audi Volkswagen

M14x1.5x75mm with conical nuts affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Vargas Turbo Technologies - Corporate Logo
ES#:
4487743
Mfg#:
TISTUD20145RAW
Ships in 10 Business Days
ON SALE! SAVE 15%
$339.99

This product was last offered at the strikethrough price on
07-02-2026

$288.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Unitronic Performance Software - Stage 1 - With UniCONNECT+ Cable

ES#4376316 - 30T-EA839-1-UC - Unitronic Performance Software - Stage 1 - With UniCONNECT+ Cable - Gain up to 69 horsepower and 97 lb-ft of torque on 91 Octane - Unitronic - Audi

Gain up to 69 horsepower and 97 lb-ft of torque on 91 Octane affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms Buy Unitronic Software 6/22/26 - 7/10/26 for a chance to win your Software & UniCONNECT+ Cable for FREE!

Brand:
Unitronic - Corporate Logo
ES#:
4376316
Mfg#:
30T-EA839-1-UC
In Stock
ON SALE! SAVE 15%
$1014.99

This product was last offered at the strikethrough price on
06-22-2026

$864.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

IE Rear Sway Bar Upgrade

ES#5375236 - IESSCK1 - IE Rear Sway Bar Upgrade - Direct bolt-in replacement with adjustable stiffness for reduced body roll and increased grip! - Integrated Engineering - Audi

Direct bolt-in replacement with adjustable stiffness for reduced body roll and increased grip! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Integrated Engineering - Corporate Logo
ES#:
5375236
Mfg#:
IESSCK1
Ships in 1 Business Day
$429.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Luft-Technik Intake Air Scoop

ES#3183334 - 019848ECS01 - Luft-Technik Intake Air Scoop - Extends farther down behind the grille to direct more air to the intake system - ECS - Audi

Extends farther down behind the grille to direct more air to the intake system affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3183334
Mfg#:
019848ECS01
In Stock
ON SALE! SAVE 10%
$135.99

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

$122.39 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Strap Style Tow Hook - Red

ES#4641959 - E313 - Strap Style Tow Hook - Red - Designed to handle any off-track adventure quickly and reliably - Rennline - Audi

Designed to handle any off-track adventure quickly and reliably affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Rennline - Corporate Logo
ES#:
4641959
Mfg#:
E313
Ships in 3 Business Days
$142.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Lightweight Front Rotors 2-piece - Pair (350mm)

Direct bolt-on replacement - 38% less weight! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
JH Motorsports - Corporate Logo
ES#:
4715949
Mfg#:
JHM-2102X350X32
Ships in 10 Business Days
$849.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Euro Ceramic Brake Pad Set- Rear

ES#4620312 - EUR1898A - Euro Ceramic Brake Pad Set- Rear - For those looking for a low dust replacement brake pad - Akebono - Audi

For those looking for a low dust replacement brake pad affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits Up to 2020 Model Year Only

Brand:
Akebono - Corporate Logo
ES#:
4620312
Mfg#:
EUR1898A
In Stock
$140.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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

ES#2177180 - 6-ECS-015 - Wheel Spacer & Bolt Kit - 5mm With Ball Seat Bolts - Get the right size wheel spacer for your Audi - ECS - Audi

Get the right size wheel spacer for your Audi 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#:
2177180
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

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
ON SALE! SAVE 10%
$908.00

This product was last offered at the strikethrough price on
06-28-2026

$817.20 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
ON SALE! SAVE 10%
$450.00

This product was last offered at the strikethrough price on
07-06-2026

$405.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

19" Wheel Spacer Flush Fit Kit - Polished Bolts

ES#3240972 - 023881ECS02KT - 19" Wheel Spacer Flush Fit Kit - Polished Bolts - Includes ECS spacers & Polished bolts to obtain a flush look on your OE 19" wheels - ECS - Audi

Includes ECS spacers & Polished bolts to obtain a flush look on your OE 19" wheels affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3240972
Mfg#:
023881ECS02KT
Back Ordered
Auto Notify
ON SALE!
$270.99

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

$262.86 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

COBB Tuning Accessport Tuner V3

ES#4668573 - AP3-VLK-004 - COBB Tuning Accessport Tuner V3 - Gain up to 80 horsepower and 151 lb-ft of torque on 93 Octane - CobbTuning - Audi

Gain up to 80 horsepower and 151 lb-ft of torque on 93 Octane affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
CobbTuning - Corporate Logo
ES#:
4668573
Mfg#:
AP3-VLK-004
In Stock
$770.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Carbon Fiber Turbo Inlet

ES#4758913 - UH044-INA - Carbon Fiber Turbo Inlet - Upgrade your Audi S4 or S5 with the Carbon Fiber Turbo Inlet for unparalleled performance and airflow efficiency. - Unitronic - Audi

Upgrade your Audi S4 or S5 with the Carbon Fiber Turbo Inlet for unparalleled performance and airflow efficiency. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms Buy Unitronic Software 6/22/26 - 7/10/26 for a chance to win your Software & UniCONNECT+ Cable for FREE!
Tune is recommend for the best performance

Brand:
Unitronic - Corporate Logo
ES#:
4758913
Mfg#:
UH044-INA
Ships on Jul 22, 2026
$375.99 USD
Free Shipping
on orders $49 and up
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 Buy Unitronic Software 6/22/26 - 7/10/26 for a chance to win your Software & UniCONNECT+ Cable for FREE!
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
ON SALE! SAVE 17%
$900.00

This product was last offered at the strikethrough price on
06-22-2026

$750.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 A4/S4 Carbon Fiber Front Lip Spoiler & Grille Accent Set

ES#5470749 - 019196ECSEBKT - Audi B9 A4/S4 Carbon Fiber Front Lip Spoiler & Grille Accent Set - Hand-laid carbon fiber to upgrade your exterior styling - Enthusiast Bundles - Audi

Hand-laid carbon fiber to 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

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
5470749
Mfg#:
019196ECSEBKT
In Stock
ON SALE!
$749.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Complete Carbon Fiber Grille Accent And Overlay Kit

ES#3557655 - 024315ecs01KT - Complete Carbon Fiber Grille Accent And Overlay Kit - Completely change your front end appearance with the full kit! - ECS - Audi

Completely change your front end appearance with the full kit! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Does not fit vehicles with Drivers Assistance Package. Fits up to 2019 model year with *pre-facelift* front bumpers

Brand:
ECS - Corporate Logo
ES#:
3557655
Mfg#:
024315ECS01KT
Ships on Dec 4, 2026
ON SALE! SAVE 10%
$821.99

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

$739.79 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.

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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