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Audi A4 Performance Parts & Upgrades

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TGK Motorsport Complete Billet Rear Subframe Insert Kit

Precision-machined billet aluminum rear subframe inserts that eliminate unwanted chassis flex and sharpen the handling of your B9 Audi.

Brand:
TGK Motorsport - Corporate Logo
ES#:
5477665
Mfg#:
TGK-0404-08
Ships in 5 Business Days
$329.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Stage 1+

Average gain of 58 horsepower and 80 lb-ft of torque on 93 Octane

Brand:
Tunezilla - Corporate Logo
ES#:
3437352
Mfg#:
TFSI-20T-1+
Ships in 7 Business Days
$599.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front & Rear Brake Rotors - Set (345x30 / 300x22)

Restore the stopping power in your vehicle Replacement rotors for vehicles with the Stage 1 Big Brake Kit

Brand:
Zimmermann - Corporate Logo
ES#:
5491047
Mfg#:
8E0615301VKT
Ships in 1 Business Day
ON SALE!
$394.99

This product was last offered at the strikethrough price on
09-15-2026

$382.74 USD
This product is lifetime replacement eligible Lifetime Replacement

APR Plus ECU Upgrade

ES#3690535 - b9a420tstg1KT1 - APR Plus ECU Upgrade - Higher peak figures of 306 HP with 376 FT-LBS of torque - *with APR PLUS limited powertrain warranty* - APR - Audi Porsche

Higher peak figures of 306 HP with 376 FT-LBS of torque - *with APR PLUS limited powertrain warranty* Call In Or Chat For Best Price!
This upgrade must be performed at ECS Tuning's facility in Ohio.

Brand:
APR - Corporate Logo
ES#:
3690535
Mfg#:
B9A420TSTG1KT1
Ships in 1 day
$1099.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Headlight Set

Keep your exterior lights shining bright 10X Entries Into Our F80 M3 Sweepstakes
For pre-facelift models only. Fits through the 2019 model year.

Brand:
Assembled By ECS - Corporate Logo
ES#:
4782878
Mfg#:
8W0941773BAKT
Ships in 1 day
$5075.00

This product was last offered at the strikethrough price on
05-07-2026

$4930.00 USD
Free Shipping
on orders $49 and up

Front Brake Rotors - Pair (320x30)

Restore your stopping power

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2738461
Mfg#:
8R0615301CKT
Ships in 1 day
$257.00

This product was last offered at the strikethrough price on
09-03-2026

$255.99 USD

Front & Rear Brake Rotors - Set (345x30 / 300x22)

Restore the stopping power in your vehicle Replacement rotors for vehicles with the Stage 1 Big Brake Kit

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
5491055
Mfg#:
8E0615301TKT2KT
Ships in 1 day
$1350.99

This product was last offered at the strikethrough price on
08-31-2026

$1341.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Headlight Set

Keep your exterior lights shining bright For pre-facelift models only. Fits through the 2019 model year.

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4782860
Mfg#:
8W0941773BKT
Ships in 2 Business Days
$7262.99

This product was last offered at the strikethrough price on
08-31-2026

$7145.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ECS Wheel Spacer & Bolt Kit - 15/20mm With Black Ball Seat Bolts

Includes everything you need to install spacers on four wheels 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
5481182
Mfg#:
ECS10157KTWB1KT
Ships in 3 Business Days
$486.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rocker Panel Side Blade Set - Primed

ES#1892340 - 8K0998032 - Rocker Panel Side Blade Set - Primed - Includes the left and right side blade with securing clips - Genuine Volkswagen Audi - Audi

Includes the left and right side blade with securing clips For S-Line models

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
1892340
Mfg#:
8K0998032
Ships in 4 Business Days
$761.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Street Density Transmission Mount Spacer Kit

ES#4430199 - JHM-ATMSK-SD - Street Density Transmission Mount Spacer Kit - This spacer will allow you to upgrade the driveline of your automatic/tiptronic transmission. - JH Motorsports - Audi

This spacer will allow you to upgrade the driveline of your automatic/tiptronic transmission. For automatic transmission models

Brand:
JH Motorsports - Corporate Logo
ES#:
4430199
Mfg#:
JHM-ATMSK-SD
Ships in 4 Business Days
$231.99

This product was last offered at the strikethrough price on
05-01-2026

$189.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Track Density Transmission Mount Spacer Kit

ES#4430212 - JHM-ATMSK-TD - Track Density Transmission Mount Spacer Kit - This spacer will allow you to upgrade the driveline of your automatic/tiptronic transmission. - JH Motorsports - Audi

This spacer will allow you to upgrade the driveline of your automatic/tiptronic transmission. For automatic transmission models

Brand:
JH Motorsports - Corporate Logo
ES#:
4430212
Mfg#:
JHM-ATMSK-TD
Ships in 4 Business Days
$123.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Headlight Set

Keep your exterior lights shining bright For Facelift models only. Fits from the 2020 model year.

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4782865
Mfg#:
8W0941033FKT
Ships in 4 Business Days
$7029.99

This product was last offered at the strikethrough price on
08-31-2026

$6915.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

RA4 240mm Clutch Conversion Kit - Stage 2, Driveshaft Center Support Bearing Carrier & Rear Differential Mount

ES#4751083 - RA4S2-STEELEBKT - RA4 240mm Clutch Conversion Kit - Stage 2, Driveshaft Center Support Bearing Carrier & Rear Differential Mount - ECS RA4 Lightweight Flywheel with the Audi RS4 clutch kit - Enthusiast Bundles - Audi Volkswagen

ECS RA4 Lightweight Flywheel with the Audi RS4 clutch kit Don't See A Bundle You Want - Give Us A Call Or Chat - We Will Make One!

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4751083
Mfg#:
RA4S2-STEELEBKT
Ships on Oct 13, 2026
ON SALE! SAVE 18%
$1581.99

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

$1299.99 USD
Free Shipping
This product is lifetime replacement eligible Partial 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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Manufacturer names and/or part numbers are used only for identification purposes.

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