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Audi B9 S4 Quattro 3.0T Performance Parts & Upgrades

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RaceChip GTS Black With App Control

ES#4339048 - 904526 - RaceChip GTS Black With App Control - Get up to +41 hp and +74 through a safe and easy to use app-controlled tuning module from RaceChip - Race Chip - Audi

Get up to +41 hp and +74 through a safe and easy to use app-controlled tuning module from RaceChip

Brand:
Race Chip - Corporate Logo
ES#:
4339048
Mfg#:
904526
Ships on Oct 30, 2026
$799.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

034 Motorsport 2.5mm Wheel Spacer - Pair

ES#4751520 - 034-604-7019 - 034 Motorsport 2.5mm Wheel Spacer - Pair - 2.5mm Wheel Spacer Pair is designed to fit most Audi & BMW vehicles with a 66.6mm center bore and 5x112mm wheel bolt patterns. - 034Motorsport - Audi

2.5mm Wheel Spacer Pair is designed to fit most Audi & BMW vehicles with a 66.6mm center bore and 5x112mm wheel bolt patterns. 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
4751520
Mfg#:
034-604-7019
In Stock
$49.00 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

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

SuperDuper Turbo Inlet Pipe + P34 SuperDuper Conversion Kit

ES#4642913 - 034-108-5043 - SuperDuper Turbo Inlet Pipe + P34 SuperDuper Conversion Kit - Includes conversion kit to to convert your P34 Intake from a stock turbo sized inlet to our larger SuperDuper Turbo Inlet Pipe. - 034Motorsport - Audi

Includes conversion kit to to convert your P34 Intake from a stock turbo sized inlet to our larger SuperDuper Turbo Inlet Pipe. 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
4642913
Mfg#:
034-108-5043
In Stock
$250.00 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 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
09-28-2026

$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!

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
5470749
Mfg#:
019196ECSEBKT
Ships on Nov 30, 2026
ON SALE!
$749.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Adjustable Front Sway Bar End Links - without hardware

ES#3468816 - 034-402-4025 - Adjustable Front Sway Bar End Links - without hardware - 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. 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
3468816
Mfg#:
034-402-4025
Ships in 4 Business Days
$249.00 USD
Free Shipping
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! 10X Entries Into Our F80 M3 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 Mar 12, 2027
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

Special Active Front And Rear Struts

ES#4698700 - 82451406KT - Special Active Front And Rear Struts - Superior handling without compromising ride quality - Koni - Audi

Superior handling without compromising ride quality Vehicle will lose Adaptive Dampening Control

Brand:
Koni - Corporate Logo
ES#:
4698700
Mfg#:
82451406KT
Back Ordered
$732.99 USD
Free Shipping
on orders $49 and up

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

Brand:
Rennline - Corporate Logo
ES#:
4641959
Mfg#:
E313
Ships in 3 Business Days
ON SALE! SAVE 15%
$142.00

This product was last offered at the strikethrough price on
10-07-2026

$120.00 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!
This upgrade must be performed at ECS Tuning's facility in Ohio.

Brand:
APR - Corporate Logo
ES#:
4057386
Mfg#:
DPP-30T-MG1
In Stock
ON SALE! SAVE 20%
$899.99

This product was last offered at the strikethrough price on
09-28-2026

$719.96 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

CTS Transmission Mount Insert

ES#3410473 - CTS-HW-0249 - CTS Transmission Mount Insert - Eliminate excess drivetrain slop and movement without additional NVH - CTS - Audi

Eliminate excess drivetrain slop and movement without additional NVH

Brand:
CTS - Corporate Logo
ES#:
3410473
Mfg#:
CTS-HW-0249
Back Ordered
ON SALE! SAVE 20%
$59.99

This product was last offered at the strikethrough price on
09-29-2026

$47.99 USD
Free Shipping
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 10X Entries Into Our F80 M3 Sweepstakes
Fits OEM wheels, or wheels that use OEM ball seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2177180
Mfg#:
6-ECS-015
Ships on Dec 7, 2026
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

DR Series Wheel Spacers - 18mm (1 Pair)

ES#2561830 - 3655668 - DR Series Wheel Spacers - 18mm (1 Pair) - Get a new set of spacers and widen the stance of your vehicle - H&R - Audi Mercedes Benz Porsche

Get a new set of spacers and widen the stance of your vehicle We Price Match - Give Us A Call or Chat!

Brand:
H&R - Corporate Logo
ES#:
2561830
Mfg#:
3655668
Ships in 3 Business Days
10% off MSRP

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

$129.99

This product was last offered at the strikethrough price on
10-01-2026

$116.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Carbon Fiber Front Lip Overlay - Audi B9 A4/S4

ES#3220704 - 022539ECS01 - Carbon Fiber Front Lip Overlay - Audi B9 A4/S4 - Add a subtle touch of carbon fiber to your B9 A4/S4 front bumper - ECS - Audi

Add a subtle touch of carbon fiber to your B9 A4/S4 front bumper 10X Entries Into Our F80 M3 Sweepstakes

Fits up to 2019 model year with *pre-facelift* front bumpers

Brand:
ECS - Corporate Logo
ES#:
3220704
Mfg#:
022539ECS01
In Stock
ON SALE! SAVE 59%
$243.99

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

$100.00 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.

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