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Audi S4 Engine Parts & Accessories

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Timing Belt Kit - Ultimate With Gates Racing Timing Belt & Cam Locking Tool

ES#2777125 - 078198671kt - Timing Belt Kit - Ultimate With Gates Racing Timing Belt & Cam Locking Tool - Complete kit to service your timing belt, water pump, and thermostat - Assembled By ECS - Audi

Complete kit to service your timing belt, water pump, and thermostat 10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Assembled By ECS - Corporate Logo
ES#:
2777125
Mfg#:
078198671KT
Ships in 10 Business Days
ON SALE!
$619.99

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

$563.14 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Self-Locking Nut - Priced Each

ES#2588753 - N90369001 - Self-Locking Nut - Priced Each - Install new hardware with your new parts. M10x1.5 - Rein - Audi BMW Volkswagen

Install new hardware with your new parts. M10x1.5 2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!
Used to secure the catalyst/downpipe to the turbo

Brand:
Rein - Corporate Logo
ES#:
2588753
Mfg#:
N90369001
In Stock
$4.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Resonated

ES#2827484 - SSXAU367 - Cat-Back Exhaust System - Resonated - 2.37" stainless steel with quad 100mm black Cerakote tips - Milltek Sport - Audi

2.37" stainless steel with quad 100mm black Cerakote tips Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
From the 2013 model year

Brand:
Milltek Sport - Corporate Logo
ES#:
2827484
Mfg#:
SSXAU367
Ships on Nov 18, 2026
ON SALE! SAVE 10%
$3526.99

This product was last offered at the strikethrough price on
10-26-2026

$3174.05 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Fuel Injector Repair Kit - Priced Each

ES#2712211 - 06E998907E - Fuel Injector Repair Kit - Priced Each - One kit services one injector - Genuine Volkswagen Audi - Audi

One kit services one injector Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2712211
Mfg#:
06E998907E
In Stock
47% off MSRP

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

$56.00

This product was last offered at the strikethrough price on
07-12-2026

$29.66 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Idler Pulley

ES#3981244 - 078121235G - Idler Pulley - Provides mounting for the fan clutch - URO - Audi Volkswagen

Provides mounting for the fan clutch 2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
3981244
Mfg#:
078121235G
Ships in 1 Business Day
$150.64 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

B9 S4/S5 Cat-Back Exhaust System - Non-Resonated (Louder)

ES#3466846 - SSXAU701 - B9 S4/S5 Cat-Back Exhaust System - Non-Resonated (Louder) - 2.50" stainless steel with quad GT-100 cerakote black tips - Milltek Sport - Audi

2.50" stainless steel with quad GT-100 cerakote black tips Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
Fits models with factory rear sports differential

Brand:
Milltek Sport - Corporate Logo
ES#:
3466846
Mfg#:
SSXAU701
Ships on Nov 18, 2026
ON SALE! SAVE 10%
$3507.99

This product was last offered at the strikethrough price on
08-17-2026

$3156.71 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Performance Cat-Back Exhaust System

ES#3107059 - 140403 - Performance Cat-Back Exhaust System - 2.5" stainless steel with quad 3.5" polished stainless tips - Borla - Audi

2.5" stainless steel with quad 3.5" polished stainless tips Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Borla - Corporate Logo
ES#:
3107059
Mfg#:
140403
Ships in 10 Business Days
$3130.99 USD
Free Shipping

Valve Cover - Right

ES#4810720 - 06E103472N - Valve Cover - Right - For cylinder 1-3 and includes the gasket and bolts - Mahle - Audi

For cylinder 1-3 and includes the gasket and bolts Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Mahle - Corporate Logo
ES#:
4810720
Mfg#:
06E103472N
Ships in 1 day
$251.99

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

$184.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Filter Kit - Pack Of 5

ES#514112 - 06E115562A - Oil Filter Kit - Pack Of 5 - Stock up and save - Hengst - Audi

Stock up and save 5X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat! Hengst is our preferred OEM filtration supplier!

Brand:
Hengst - Corporate Logo
ES#:
514112
Mfg#:
06E115562A
In Stock
$64.99 USD
Free Shipping
on orders $49 and up

Hydraulic Lash Adjuster - Priced Each

ES#4340784 - 06M109423A - Hydraulic Lash Adjuster - Priced Each - Also called the Cam Follower or Valve lifter - Genuine Volkswagen Audi - Audi

Also called the Cam Follower or Valve lifter Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4340784
Mfg#:
06M109423A
Ships in 1 day
12% off MSRP

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

$58.99

This product was last offered at the strikethrough price on
08-04-2026

$51.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

PCV Gasket

ES#3186721 - 06M103517B - PCV Gasket - Located between the oil separator and the valve cover - Genuine Volkswagen Audi - Audi

Located between the oil separator and the valve cover Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3186721
Mfg#:
06M103517B
In Stock
25% off MSRP

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

$44.00

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

$32.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Pipe - Return

ES#4818461 - 06E121065N - Coolant Pipe - Return - Main return pipe that connects to the heater core hoses and the engine - Bremmen Parts - Audi

Main return pipe that connects to the heater core hoses and the engine 10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818461
Mfg#:
06E121065N
In Stock
ON SALE! SAVE 18%
$40.99

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

$33.59 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Mass Air Flow Sensor (MAF)

ES#261717 - 06C133471A - Mass Air Flow Sensor (MAF) - Restore fuel economy and performance - Hitachi - Audi

Restore fuel economy and performance Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
From the 2001 model year

Brand:
Hitachi - Corporate Logo
ES#:
261717
Mfg#:
06C133471A
Back Ordered
$181.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Supercharger Intercooler Kit

ES#4475593 - 06E145621SKT2 - Supercharger Intercooler Kit - Everything needed to replace failed heat exchangers. - Genuine Volkswagen Audi - Audi

Everything needed to replace failed heat exchangers. Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4475593
Mfg#:
06E145621SKT2
Ships in 4 Business Days
$1705.75

This product was last offered at the strikethrough price on
08-24-2026

$1546.75 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Reinzosil Oil Pan Gasket/Silicone Sealant - 70ml

ES#11836 - D176404A2 - Reinzosil Oil Pan Gasket/Silicone Sealant - 70ml - Useful for the creation of many gaskets - Victor Reinz - Audi BMW Volkswagen Porsche

Useful for the creation of many gaskets Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Victor Reinz - Corporate Logo
ES#:
11836
Mfg#:
D176404A2
In Stock
$8.29 USD
Free Shipping
on orders $49 and up

Accessory Belt

ES#2746490 - 06E903137T - Accessory Belt - Replace your cracked or worn belt - Continental - Audi

Replace your cracked or worn belt Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!
From the 2013 model year

Brand:
Continental - Corporate Logo
ES#:
2746490
Mfg#:
06E903137T
In Stock
$30.48

This product was last offered at the strikethrough price on
05-28-2026

$29.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Parts & Accessories

Whether you're maintaining or repairing your stock engine or looking for added horsepower, we have one of the most comprehensive inventories of engine parts and accessories for German cars. From hard engine parts like connecting rods, pistons, cylinder heads, short blocks, and engine timing parts to performance engine software upgrades; we have you covered.

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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