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Audi S4 Engine Pulley Parts

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CTS Turbo 3.0T V6 Dual Pulley Upgrade Kit (Press-on - 187mm)

ES#4017694 - CTS-HW-434 - CTS Turbo 3.0T V6 Dual Pulley Upgrade Kit (Press-on - 187mm) - Larger diameter crank pulley & smaller supercharger pulley increases the speed at which the supercharger spins, increasing the boost pressure output - CTS - Audi Porsche

Larger diameter crank pulley & smaller supercharger pulley increases the speed at which the supercharger spins, increasing the boost pressure output *NOTE: This kit must be used with appropriate "Stage 2" performance software.

Brand:
CTS - Corporate Logo
ES#:
4017694
Mfg#:
CTS-HW-434
Ships in 7 Business Days
ON SALE! SAVE 20%
$529.99

This product was last offered at the strikethrough price on
09-29-2026

$423.98 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

CTS Turbo 3.0T V6 Dual Pulley Upgrade Kit (Bolt-On - 180mm)

ES#4017699 - CTS-HW-435 - CTS Turbo 3.0T V6 Dual Pulley Upgrade Kit (Bolt-On - 180mm) - Larger diameter crank pulley & smaller supercharger pulley increases the speed at which the supercharger spins, increasing the boost pressure output - CTS - Audi Porsche

Larger diameter crank pulley & smaller supercharger pulley increases the speed at which the supercharger spins, increasing the boost pressure output *NOTE: This kit must be used with appropriate "Stage 2" performance software.

Brand:
CTS - Corporate Logo
ES#:
4017699
Mfg#:
CTS-HW-435
Special Order: No Guaranteed ETA
ON SALE! SAVE 20%
$529.99

This product was last offered at the strikethrough price on
09-29-2026

$423.98 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

CTS Turbo 3.0T V6 Dual Pulley Upgrade Kit (Press-on - 180mm)

ES#4017693 - CTS-HW-433 - CTS Turbo 3.0T V6 Dual Pulley Upgrade Kit (Press-on - 180mm) - Larger diameter crank pulley & smaller supercharger pulley increases the speed at which the supercharger spins, increasing the boost pressure output - CTS - Audi Porsche

Larger diameter crank pulley & smaller supercharger pulley increases the speed at which the supercharger spins, increasing the boost pressure output *NOTE: This kit must be used with appropriate "Stage 2" performance software.

Brand:
CTS - Corporate Logo
ES#:
4017693
Mfg#:
CTS-HW-433
Special Order: No Guaranteed ETA
ON SALE! SAVE 20%
$529.99

This product was last offered at the strikethrough price on
09-29-2026

$423.98 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Accessory Belt Idler Pulley

ES#4871908 - 06E903341A - Accessory Belt Idler Pulley - Also referred to as the 'relay roller' - Bremmen Parts - Audi

Also referred to as the 'relay roller' 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bremmen Parts - Corporate Logo
ES#:
4871908
Mfg#:
06E903341A
In Stock
ON SALE! SAVE 22%
$20.99

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

$16.31 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

APR Supercharger Drive Pulley Upgrade

ES#3219163 - MS100135 - APR Supercharger Drive Pulley Upgrade - Decreases the diameter of the factory pulley from ~63.25mm to ~57.75mm, which in turn spins the supercharger ~9.5% faster. - APR - Audi Porsche

Decreases the diameter of the factory pulley from ~63.25mm to ~57.75mm, which in turn spins the supercharger ~9.5% faster. Call In Or Chat For Best Price!
- APR Stage II software is required to run any upgraded Pulley configuration and is sold separately - Ple

Brand:
APR - Corporate Logo
ES#:
3219163
Mfg#:
MS100135
Ships in 5 Business Days
ON SALE! SAVE 10%
$222.99

This product was last offered at the strikethrough price on
09-28-2026

$200.66 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Unitronic Supercharger Pulley Kit For 3.0TFSI

ES#4821282 - UH016BTA - Unitronic Supercharger Pulley Kit For 3.0TFSI - Unitronic's Supercharger Pulley Upgrade effectively raises boost levels by increasing the speed in which the supercharger spins. - Unitronic - Audi

Unitronic's Supercharger Pulley Upgrade effectively raises boost levels by increasing the speed in which the supercharger spins.

Brand:
Unitronic - Corporate Logo
ES#:
4821282
Mfg#:
UH016BTA
Ships in 2 Business Days
$199.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Socket Head Collared Screw - Priced Each

ES#471966 - N91128701 - Socket Head Collared Screw - Priced Each - Install new hardware with your new parts. M8x32 - Genuine Volkswagen Audi - Audi Volkswagen

Install new hardware with your new parts. M8x32 Secures accessory belt tensioner - Two required

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
471966
Mfg#:
N91128701
In Stock
43% off MSRP

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

$6.96

This product was last offered at the strikethrough price on
10-22-2026

$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Audi 3.0T Performance Overdrive Crank Pulley With Belt - 187.3mm - For Use With Supercharger Pulley Upgrade

ES#4056962 - 025510ecs01KT - Audi 3.0T Performance Overdrive Crank Pulley With Belt - 187.3mm - For Use With Supercharger Pulley Upgrade - Spin the supercharger faster without affecting the accessory drive system - ECS - Audi Volkswagen Porsche

Spin the supercharger faster without affecting the accessory drive system 10X Entries Into Our F80 M3 Sweepstakes
Appropriate stage 2 software is required for use

Brand:
ECS - Corporate Logo
ES#:
4056962
Mfg#:
025510ECS01KT
Ships in 1 Business Day
$398.98

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

$386.30 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Accessory Belt Kit W/ Tensioner

ES#2678391 - 06E903137TKT - Accessory Belt Kit W/ Tensioner - Keep your accessories running properly with a new tensioner and drive belt - Genuine Volkswagen Audi - Audi

Keep your accessories running properly with a new tensioner and drive belt From the 2013 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2678391
Mfg#:
06E903137TKT
Ships in 1 day
$371.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Accessory Belt Kit W/ Tensioner

ES#2678390 - 06E903137QKT - Accessory Belt Kit W/ Tensioner - Keep your accessories running properly with a new tensioner and drive belt - Genuine Volkswagen Audi - Audi

Keep your accessories running properly with a new tensioner and drive belt Up to the 2012 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2678390
Mfg#:
06E903137QKT
Ships in 1 day
$368.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

A/C Condenser

ES#4770467 - 8W0816421H - A/C Condenser - Restore that ice cold A/C! - Nissens - Audi

Restore that ice cold A/C! We Price Match - Give Us A Call or Chat!

Brand:
Nissens - Corporate Logo
ES#:
4770467
Mfg#:
8W0816421H
Ships in 6 Business Days
$359.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Accessory Belt Idler Pulley

ES#4057407 - 06E903341G - Accessory Belt Idler Pulley - Also referred to as the 'relay roller' - URO - Audi

Also referred to as the 'relay roller' 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
4057407
Mfg#:
06E903341G
In Stock
$19.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Supercharger Reduction Pulley Upgrade

ES#3220459 - FMSCPS53T - Supercharger Reduction Pulley Upgrade - Contains a Supercharger Reduction Pulley and drive belt for the Audi 3.0T models - Forge - Audi Porsche

Contains a Supercharger Reduction Pulley and drive belt for the Audi 3.0T models

Brand:
Forge - Corporate Logo
ES#:
3220459
Mfg#:
FMSCPS53T
Ships on Nov 12, 2026
$346.99 USD
Free Shipping
on orders $49 and up

Accessory Belt Tensioner

ES#2187572 - 078903133AB - Accessory Belt Tensioner - Keep your drive belt tight - URO - Audi Volkswagen

Keep your drive belt tight 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2187572
Mfg#:
078903133AB
Ships in 1 Business Day
$37.54 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Alternator Pulley

ES#280992 - 06E903119M - Alternator Pulley - Does not include securing hardware - Genuine Volkswagen Audi - Audi

Does not include securing hardware Fits all up to the 2012 model year. For Bosch style alternators from the 2013 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
280992
Mfg#:
06E903119M
Ships in 6 Business Days
12% off MSRP

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

$379.99

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

$334.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Pulley Parts

Pulleys drive accessories essential to vehicle operation. Whether you need to install a stock original equipment pulley during a repair, or improve engine performance and appearance with a lightweight aluminum or underdrive pulley, count on ECS Tuning for pulley solutions that work.

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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