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Audi S4 Performance Engine & Drivetrain Parts

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ES#4669283 - UH030-48-INA - Unitronic Carbon Intake System - Stock Turbo Inlet - improved throttle response, seamless integration and perfect fitment while greatly enhancing turbo induction sounds. - Unitronic - Audi

improved throttle response, seamless integration and perfect fitment while greatly enhancing turbo induction sounds.

Brand:
Unitronic - Corporate Logo
ES#:
4669283
Mfg#:
UH030-48-INA
Ships in 5 Business Days
$2085.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3106524 - k70398fsstzKT - Stage 3 Endurance Clutch Kit - Designed for dedicated track cars. Conservatively rated at 480ft/lbs. - South Bend Clutch - Audi

Designed for dedicated track cars. Conservatively rated at 480ft/lbs. Includes single mass flywheel

Brand:
South Bend Clutch - Corporate Logo
ES#:
3106524
Mfg#:
K70398FSSTZKT
Ships in 1 Business Day
$2083.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4730319 - 034-106-Z068 - High Pressure Fuel Pump Tool - Designed to make the disassembly and reassembly of the high pressure fuel pump a breeze! - 034Motorsport - Audi Porsche

Designed to make the disassembly and reassembly of the high pressure fuel pump a breeze! 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
4730319
Mfg#:
034-106-Z068
In Stock
$26.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4013557 - 034-106-3031 - 750CC EV14 Bosch Fuel Injector - Priced Each - The most advanced injector we offer. - Bosch - Audi

The most advanced injector we offer. We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
4013557
Mfg#:
034-106-3031
Ships in 2 Business Days
$127.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4362289 - UH003-IN4 - Unitronic 3" Air Filter (Gen 1) - Unitronic - Audi Volkswagen

Brand:
Unitronic - Corporate Logo
ES#:
4362289
Mfg#:
UH003-IN4
In Stock
$54.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3220796 - 017429ECS01 -  Luft-Technik Intake Air Scoop - Audi B8 A4/A5/S4/S5 - 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 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3220796
Mfg#:
017429ECS01
In Stock
ON SALE! SAVE 44%
$178.99

This product was last offered at the strikethrough price on
05-14-2026

$99.99 USD
Free Shipping
ES#3106520 - k70398fssoKT - Stage 3 Daily Clutch Kit - Designed for high-powered street cars while capable enough to handle the track. Conservatively rated at 525ft/lbs. - South Bend Clutch - Audi

Designed for high-powered street cars while capable enough to handle the track. Conservatively rated at 525ft/lbs. Includes single mass flywheel

Brand:
South Bend Clutch - Corporate Logo
ES#:
3106520
Mfg#:
K70398FSSOKT
Ships on Nov 20, 2026
$1953.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4716234 - 601-0243 - Audi B8/B8.5 MPI Kit - Black  - Engineered for achieving the highest performance from your 3.0T! - Precision Raceworks - Audi

Engineered for achieving the highest performance from your 3.0T!

Brand:
Precision Raceworks - Corporate Logo
ES#:
4716234
Mfg#:
601-0243
Ships in 9 Business Days
$1899.99 USD
Free Shipping
on orders $49 and up
ES#4045950 - B6B7RearLSDMT - JHM Helical Rear Limited Slip Differential - Helical gears respond to changes in traction conditions very quickly - Improves traction and predictability of vehicle behavior: both rear wheels will spin at the same rate. - JH Motorsports  - Audi

Helical gears respond to changes in traction conditions very quickly - Improves traction and predictability of vehicle behavior: both rear wheels will spin at the same rate. *Fitment confirmed in ETS, EXZ, & ETQ diff codes - Does not fit in some 2007+ differential cases - Please see fitment notes in product description for co

Brand:
JH Motorsports  - Corporate Logo
ES#:
4045950
Mfg#:
B6B7REARLSDMT
Ships in 10 Business Days
$949.99 USD
Free Shipping
on orders $49 and up
ES#2855732 - FMCCRADS53T - Charge Cooler and Expansion Tank Upgrade Kit - Upgrade your supercharger cooling system - Forge - Audi

Upgrade your supercharger cooling system Fits B8.5 facelift models only (From the 2013 model year)

Brand:
Forge - Corporate Logo
ES#:
2855732
Mfg#:
FMCCRADS53T
Ships on Nov 24, 2026
$1871.99 USD

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
ES#4351842 - ieppcgj2 - Integrated Engineering 3.0T "Dual Pulley" Power Kit - Turn your Audi B8 S4 or S5 into an all-out street monster with IE's complete Dual Pulley kit! Includes ECU software plus "Dual Pulley" setup - Integrated Engineering - Audi

Turn your Audi B8 S4 or S5 into an all-out street monster with IE's complete Dual Pulley kit! Includes ECU software plus "Dual Pulley" setup
Fits vehicles with manual transmissions only

Brand:
Integrated Engineering - Corporate Logo
ES#:
4351842
Mfg#:
IEPPCGJ2
In Stock
$1799.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#2586456 - SA443H - Clutch Kit - Stage 2+ - Features a full faced, multi-friction disc with a torque rating of 540 ft/lbs - Spec Clutches - Audi

Features a full faced, multi-friction disc with a torque rating of 540 ft/lbs

Brand:
Spec Clutches - Corporate Logo
ES#:
2586456
Mfg#:
SA443H
Ships in 3 Business Days
$899.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4742750 - 051558LA01 - 4.2 Performance Clutch Kit - Organic Stage 2 - Designed to hold up to 445 ft/lbs of torque to the wheels with a sprung organic disc and steel flyweel - ECS - Audi

Designed to hold up to 445 ft/lbs of torque to the wheels with a sprung organic disc and steel flyweel 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
4742750
Mfg#:
051558LA01
In Stock
ON SALE! SAVE 10%
$662.99

This product was last offered at the strikethrough price on
10-28-2026

$596.69 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Performance Engine & Drivetrain Parts

Worn mounts, bushings, and other drivetrain components rob performance. Replace or upgrade your drivetrain with our extensive catalog of mounts, bushings, clutch kits, and more.

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