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Audi S4 Performance Engine & Drivetrain Parts

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550cc Fuel Injectors - Set Of Six

ES#2574528 - INJB550KT6 - 550cc Fuel Injectors - Set Of Six - Bosch 550cc EV14 Fuel IOnjectors - Great for stage III 2.7T upgrades. Includes injector plug adapters - Bosch - Audi

Bosch 550cc EV14 Fuel IOnjectors - Great for stage III 2.7T upgrades. Includes injector plug adapters 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
2574528
Mfg#:
INJB550KT6
Ships in 9 Business Days
$655.99

This product was last offered at the strikethrough price on
07-06-2026

$545.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Forged H-Beam Connecting Rods

ES#2794230 - IERHVD1 - Forged H-Beam Connecting Rods - Set of 6 - Integrated Engineering - Audi

Set of 6 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Integrated Engineering - Corporate Logo
ES#:
2794230
Mfg#:
IERHVD1
Ships in 5 Business Days
$808.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

APR Coolant Performance System

ES#3219341 - MS100127 - APR Coolant Performance System - Drastically reduces intake air temps (IAT), minimizes heat soak, and provides increased performance! - APR - Audi

Drastically reduces intake air temps (IAT), minimizes heat soak, and provides increased performance! Call In Or Chat For Best Price! 5X Entries For Our 25th Anniversary Sweepstakes!
*Pre-faclift models (up to 2012) require Fit Kit - Please see Fit Kit MS100136 or ES3219342 for a complet

Brand:
APR - Corporate Logo
ES#:
3219341
Mfg#:
MS100127
Ships on Aug 18, 2026
11% off MSRP

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

$1799.99

This product was last offered at the strikethrough price on
07-22-2026

$1599.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Performance Valvetrain Kit

ES#1905571 - SPRK-Audi27t - Performance Valvetrain Kit - Includes springs, retainers, and valve seats - Supertech - Audi

Includes springs, retainers, and valve seats

Brand:
Supertech - Corporate Logo
ES#:
1905571
Mfg#:
SPRK-AUDI27T
Ships in 7 Business Days
$799.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Transmission Mount Insert

ES#4620259 - 8K0399151DB - Transmission Mount Insert - Enhance your driving experience by filling the bushing void. - JH Motorsports - Audi

Enhance your driving experience by filling the bushing void.

Brand:
JH Motorsports - Corporate Logo
ES#:
4620259
Mfg#:
8K0399151DB
In Stock
$47.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 S4/S5 Eventuri Intake System - Black Carbon

ES#3604844 - EVE-B9S5-CF-INT - Audi B9 S4/S5 Eventuri Intake System - Black Carbon - Developed to give less restrictive airflow to the turbo while maintaining low inlet temperatures - Optimum performance, precise fitment, and bespoke style! - Eventuri - Audi

Developed to give less restrictive airflow to the turbo while maintaining low inlet temperatures - Optimum performance, precise fitment, and bespoke style!

Brand:
Eventuri - Corporate Logo
ES#:
3604844
Mfg#:
EVE-B9S5-CF-INT
Ships in 6 Business Days
$1550.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Performance Kevlar Reinforced Accessory Belt

ES#3677912 - 078903137BL - Performance Kevlar Reinforced Accessory Belt - Our Red Kevlar accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. - ECS - Audi
ECS Tuning recommends this product.

Our Red Kevlar accessory Belts are both an aesthetic improvement and a performance alternative to a traditional belt. 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3677912
Mfg#:
078903137BL
In Stock
$50.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Fuel Line Relocation Kit

ES#3102573 - 000931ECS08 - Fuel Line Relocation Kit - Re-routes the fuel line underneath the intake tube for a cleaner look! - ECS - Audi

Re-routes the fuel line underneath the intake tube for a cleaner look! 10X Entries For Our 25th Anniversary Sweepstakes!
Up to the 2012 model year

Brand:
ECS - Corporate Logo
ES#:
3102573
Mfg#:
000931ECS08
In Stock
ON SALE! SAVE 20%
$62.99

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

$50.39 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Driveshaft Center Support Bearing Carrier

Holds the driveshaft where it should be For vehicles with 6HP19 transmissions (6 speed automatic)

Brand:
JXB Performance - Corporate Logo
ES#:
4305094
Mfg#:
B6004A0
In Stock at Vendor
Starting at $299.99 USD
Customize
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

OEM Audi 2.9TT/4.0TT Direct Fuel Injector - Priced Each

ES#5397015 - 06m906036aq - OEM Audi 2.9TT/4.0TT Direct Fuel Injector - Priced Each - Maximum Power on Accompanying Stage 3 Tuning - Genuine Volkswagen Audi - Audi

Maximum Power on Accompanying Stage 3 Tuning

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
5397015
Mfg#:
06M906036AQ
In Stock
$277.99

This product was last offered at the strikethrough price on
07-06-2026

$249.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

850 Strapped Series Twin Disc Clutch Kits

ES#4876008 - 02029-TDFR-X - 850 Strapped Series Twin Disc Clutch Kits - Bridge the gap between a single disc clutch and the original FX850 Twin Disc - Clutch Masters - Audi

Bridge the gap between a single disc clutch and the original FX850 Twin Disc Must be used with Clutch Masters Flywheel FW-029-B-TDS

Brand:
Clutch Masters - Corporate Logo
ES#:
4876008
Mfg#:
02029-TDFR-X
Ships in 8 Business Days
15% off MSRP

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

$1760.00

This product was last offered at the strikethrough price on
07-22-2026

$1496.00 USD
Free Shipping

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.

Let us help you find the parts that fit your Audi

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Manufacturer names and/or part numbers are used only for identification purposes.

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