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Audi B6 S4 V8 Performance Parts & Upgrades

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Stage 2 Endurance Clutch Kit

Designed for track use while still streetable. Conservatively rated at 400ft/lbs. Includes single mass flywheel

Brand:
South Bend Clutch - Corporate Logo
ES#:
3106519
Mfg#:
K70398FHDOFEKT
Ships in 1 Business Day
$1822.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Ball Seat Stud Conversion Kit

ES#2806943 - 001467ECS01KT4 - Ball Seat Stud Conversion Kit - Make wheel changes faster and easier - ECS - Audi Volkswagen

Make wheel changes faster and easier 10X Entries For Our 25th Anniversary Sweepstakes!
Includes 2 different length studs for up to 10mm spacers for 2 wheels and 20mm spacers for 2 wheels.

Brand:
ECS - Corporate Logo
ES#:
2806943
Mfg#:
001467ECS01KT4
In Stock
ON SALE!
$201.99

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

$191.89 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rear Differential Carrier Mount Bushing Insert Kit

ES#3132752 - 018327ECS01 - Rear Differential Carrier Mount Bushing Insert Kit - Decrease differential slop for better drivetrain response! - ECS - Audi

Decrease differential slop for better drivetrain response! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3132752
Mfg#:
018327ECS01
Ships in 7 Business Days
ON SALE! SAVE 25%
$113.99

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

$85.49 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Limited Slip Differential

ES#2836902 - 40309175WK - Limited Slip Differential - Put all your power to the ground! - Wavetrac - Audi Porsche

Put all your power to the ground! Fits 0A3 manual transmission models only

Brand:
Wavetrac - Corporate Logo
ES#:
2836902
Mfg#:
40309175WK
Ships in 2 Business Days
$1695.00 USD
Free Shipping

Cat-Back Exhaust System - Resonated

ES#4164713 - B6S4RESONATED - Cat-Back Exhaust System - Resonated - 2.25" stainless steel with your choice of tip style - Milltek Sport - Audi

2.25" stainless steel with your choice of tip style

Brand:
Milltek Sport - Corporate Logo
ES#:
4164713
Mfg#:
B6S4RESONATED
Ships on Sep 17, 2026
Starting at $1685.99 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

M14 Titanium Wheel Stud Kit - Black - Set Of 20

ES#4487742 - TISTUD20145BLK - M14 Titanium Wheel Stud Kit - Black - Set Of 20 - M14x1.5x75mm with conical nuts - Vargas Turbo Technologies - Audi Volkswagen

M14x1.5x75mm with conical nuts 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Vargas Turbo Technologies - Corporate Logo
ES#:
4487742
Mfg#:
TISTUD20145BLK
Ships in 10 Business Days
$335.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System

ES#1892708 - 16586 - Cat-Back Exhaust System - 2.5" stainless steel with dual 4" polished stainless tips - Magnaflow - Audi

2.5" stainless steel with dual 4" polished stainless tips

Brand:
Magnaflow - Corporate Logo
ES#:
1892708
Mfg#:
16586
Back Ordered
$1646.00 USD
This product is lifetime replacement eligible Lifetime Replacement

Clutch Kit - Stage 1

ES#2586444 - SA441 - Clutch Kit - Stage 1 - Features a full faced, steel backed, multi-compound organic lined disc with a torque rating of 430 ft/lbs - Spec Clutches - Audi

Features a full faced, steel backed, multi-compound organic lined disc with a torque rating of 430 ft/lbs Recommended to be used with Spec single mass flywheel SA44S

Brand:
Spec Clutches - Corporate Logo
ES#:
2586444
Mfg#:
SA441
Ships in 1 Business Day
$819.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS Wheel Spacer & Bolt Kit - 15mm With Conical Seat Bolts

ES#2568232 - ECS10157KTWBC - ECS Wheel Spacer & Bolt Kit - 15mm 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 For Our 25th Anniversary Sweepstakes!
Fits most aftermarket wheels that require conical seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2568232
Mfg#:
ECS10157KTWBC
In Stock
ON SALE! SAVE 20%
$167.99

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

$134.39 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Lightweight Tubular Front Subframe

ES#4701693 - WAS-520 - Lightweight Tubular Front Subframe - Increases chassis rigidity for improved handling performance and eliminates subframe shifting - Verkline - Audi

Increases chassis rigidity for improved handling performance and eliminates subframe shifting

Brand:
Verkline - Corporate Logo
ES#:
4701693
Mfg#:
WAS-520
Ships in 4 Business Days
$1569.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS Wheel Spacers - 3mm (Pair)

ES#250682 - 002403ECS01A03KT - ECS Wheel Spacers - 3mm (Pair) - Exclusively built for your 57.1mm centerbore VW/Audi - ECS - Audi Volkswagen

Exclusively built for your 57.1mm centerbore VW/Audi 10X Entries For Our 25th Anniversary 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#:
250682
Mfg#:
002403ECS01A03KT
In Stock
ON SALE! SAVE 25%
$85.99

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

$64.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front EP24 "Enthusiast Performance" Brake Pad Set

ES#4739062 - EP24-1111 - Front EP24 "Enthusiast Performance" Brake Pad Set - This enthusiast-developed high-performance street and light track pad offers an ideal solution for the spirited commuter and weekend autocross driver alike. - ECS - Audi

This enthusiast-developed high-performance street and light track pad offers an ideal solution for the spirited commuter and weekend autocross driver alike. 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4739062
Mfg#:
EP24-1111
In Stock
ON SALE! SAVE 30%
$181.99

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

$127.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Density Line Front Upper Strut Mount - Priced Each

ES#2876924 - 034-601-1002-TD - Density Line Front Upper Strut Mount - Priced Each - Approximately twice as stiff as stock, for increased firmness and vehicle control - 034Motorsport - Audi

Approximately twice as stiff as stock, for increased firmness and vehicle control

Brand:
034Motorsport - Corporate Logo
ES#:
2876924
Mfg#:
034-601-1002-TD
In Stock
$45.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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

ES#2748185 - ECS10610KTWB1 - ECS Wheel Spacer & Bolt Kit - 6mm With Black 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 10X Entries For Our 25th Anniversary 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#:
2748185
Mfg#:
ECS10610KTWB1
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

Stainless Braided Brake Line Kit

ES#3432300 - 034-303-0008 - Stainless Braided Brake Line Kit - Replace your stock rubber brake hoses with these performance-minded stainless steel braided lines - 034Motorsport - Audi

Replace your stock rubber brake hoses with these performance-minded stainless steel braided lines

Brand:
034Motorsport - Corporate Logo
ES#:
3432300
Mfg#:
034-303-0008
In Stock
$152.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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

ES#2748190 - ECS10612KTWBC1 - ECS Wheel Spacer & Bolt Kit - 8mm With Black 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 For Our 25th Anniversary 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#:
2748190
Mfg#:
ECS10612KTWBC1
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

More About Performance Parts & Upgrades

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