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Audi S4 Performance Parts & Upgrades

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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

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

ES#2568229 - ECS10610KTWBC - ECS Wheel Spacer & Bolt Kit - 6mm 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 10X Entries Into Our F80 M3 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#:
2568229
Mfg#:
ECS10610KTWBC
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

Mid Exact-Fit Stainless Steel Brake Lines

ES#3450991 - 024677ECS01 - Mid Exact-Fit Stainless Steel Brake Lines - Mid set of DOT-compliant lines for an improved pedal feel - ECS - Audi

Mid set of DOT-compliant lines for an improved pedal feel 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3450991
Mfg#:
024677ECS01
In Stock
ON SALE! SAVE 15%
$93.99

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

$79.89 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Exact-Fit Stainless Steel Brake Lines

ES#8828 - ecs41010kt - Rear Exact-Fit Stainless Steel Brake Lines - Rear set of DOT-compliant lines for an improved pedal feel - ECS - Audi

Rear set of DOT-compliant lines for an improved pedal feel 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
8828
Mfg#:
ECS41010KT
In Stock
ON SALE! SAVE 25%
$94.99

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

$71.24 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 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

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 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

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

2-piece Lightweight Front Rotors - Pair (321x30)

ES#4045883 - 1018x321x30 - 2-piece Lightweight Front Rotors - Pair (321x30) - Shaves 10lbs of unsprung weight from the front of your car while increasing braking performance, plus they bolt on just like stock! - JH Motorsports - Audi

Shaves 10lbs of unsprung weight from the front of your car while increasing braking performance, plus they bolt on just like stock!

Brand:
JH Motorsports - Corporate Logo
ES#:
4045883
Mfg#:
1018X321X30
Ships in 10 Business Days
$699.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

2-piece Lightweight Rear Rotors (pair)

ES#4045891 - 1022x300x22 - 2-piece Lightweight Rear Rotors (pair) - Shaves 6lbs of unsprung weight from the rear of your car while increasing braking performance. - JH Motorsports - Audi

Shaves 6lbs of unsprung weight from the rear of your car while increasing braking performance.

Brand:
JH Motorsports - Corporate Logo
ES#:
4045891
Mfg#:
1022X300X22
Ships in 10 Business Days
$699.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

H&R Quick-Safe Stud Conversion Kit

ES#2731486 - Q-SPack45-40 - H&R Quick-Safe Stud Conversion Kit - Set of 20 studs. M14 x 1.5 x 40 - H&R - Audi Volkswagen

Set of 20 studs. M14 x 1.5 x 40 We Price Match - Give Us A Call or Chat!

Brand:
H&R - Corporate Logo
ES#:
2731486
Mfg#:
Q-SPACK45-40
Ships in 3 Business Days
$174.95 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Eurodyne Reflash - With Powertap Air Flash Tool

ES#3514900 - eurodyne30tKT - Eurodyne Reflash - With Powertap Air Flash Tool - Tune your car with just your laptop and choose gains ranging from 97-108 hp and 45-56 ft-lb of torque - Eurodyne - Audi

Tune your car with just your laptop and choose gains ranging from 97-108 hp and 45-56 ft-lb of torque Both B8 and B8.5 models are supported.

Brand:
Eurodyne - Corporate Logo
ES#:
3514900
Mfg#:
EURODYNE30TKT
In Stock
$699.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front Slotted Brake Rotors - Pair (350x34)

Upgrade your looks and performance with a set of slotted rotors!

Brand:
Emmanuele Design - Corporate Logo
ES#:
4872025
Mfg#:
EMD-35034-PR
Ships in 10 Business Days
$349.00 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
Ships in 2 Business Days
ON SALE! SAVE 10%
$770.00

This product was last offered at the strikethrough price on
10-15-2026

$693.00 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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