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Audi S4 Most Popular Parts

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IE Performance Cast Downpipe

ES#4473979 - IEEXCK3 - IE Performance Cast Downpipe - Features a TIG-welded 304 stainless and investment cast body and offers gains up to 45HP & 41TQ - Integrated Engineering - Audi

Features a TIG-welded 304 stainless and investment cast body and offers gains up to 45HP & 41TQ 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Integrated Engineering - Corporate Logo
ES#:
4473979
Mfg#:
IEEXCK3
In Stock
$1099.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Heat Exchanger Kit - Bolt-On - Performance Multi-Pass - Black

ES#4442371 - PMPHX30T40TBLACK - Heat Exchanger Kit - Bolt-On - Performance Multi-Pass - Black - Installation of this kit is now easier than ever, without the need of removing the crash bar to drill holes for bracket mounting. - JH Motorsports - Audi

Installation of this kit is now easier than ever, without the need of removing the crash bar to drill holes for bracket mounting.

Brand:
JH Motorsports - Corporate Logo
ES#:
4442371
Mfg#:
PMPHX30T40TBLACK
Ships in 1-3 days
$699.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

PCV Breather Hose/Turbo Inlet Manifold

ES#3678755 - 06M129041 - PCV Breather Hose/Turbo Inlet Manifold - Receiving an engine code calling out a boost leak, it may be your breather hose - Genuine Volkswagen Audi - Audi

Receiving an engine code calling out a boost leak, it may be your breather hose

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3678755
Mfg#:
06M129041
In Stock
7% off MSRP

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

$188.33

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

$175.79 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front 2-Piece Scalloped Brake Rotors - Pair (365x34)

ES#2785596 - 003281ECS02A02KT - Front 2-Piece Scalloped Brake Rotors - Pair (365x34) - Direct bolt-on upgrade to Tru-Float scalloped style rotors - ECS - Audi

Direct bolt-on upgrade to Tru-Float scalloped style rotors 10X Entries For Our 25th Anniversary Sweepstakes!

Replacement rotors for vehicles with the Stage 3 Audi RS Big Brake Kit

Brand:
ECS - Corporate Logo
ES#:
2785596
Mfg#:
003281ECS02A02KT
In Stock
ON SALE!
$1680.99

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

$1630.56 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Performance Lightweight Flywheel Kit

ES#2826499 - 003886ecs01aKT - Performance Lightweight Flywheel Kit - A single mass flywheel engineered to handle more power, offering a 38% reduction in weight! - ECS - Audi

A single mass flywheel engineered to handle more power, offering a 38% reduction in weight! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2826499
Mfg#:
003886ECS01AKT
Ships on Sep 25, 2026
ON SALE! SAVE 25%
$1682.99

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

$1262.24 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Synthetic Gear Oil 75w90 - 1 Liter

ES#4766 - G052145S2 - Synthetic Gear Oil 75w90 - 1 Liter - Keep your gears quiet and smooth with new fluid - Genuine Volkswagen Audi - Audi Volkswagen

Keep your gears quiet and smooth with new fluid 1.9L needed for drain & refill

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4766
Mfg#:
G052145S2
In Stock
$35.79 USD
Free Shipping
on orders $49 and up

B8 3.0T Free-Flow "Shorty" Exhaust Headers

ES#4783226 - 053829LA01-02 - B8 3.0T Free-Flow "Shorty" Exhaust Headers - Experience an impressive 48% increase in flow with our ceramic-coated, tubular stainless steel headers! - ECS - Audi
ECS Tuning recommends this product.

Experience an impressive 48% increase in flow with our ceramic-coated, tubular stainless steel headers! 10X Entries For Our 25th Anniversary Sweepstakes!
10X Entries For Our Spin To Win Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4783226
Mfg#:
053829LA01-02
In Stock
ON SALE! SAVE 20%
$1040.99

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

$832.79 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

B9 S4 3.0T Center X-Pipe

ES#3521607 - 024365ecs01KT - B9 S4 3.0T Center X-Pipe - Sound great and save weight! Eliminate the center resonator on your OE system for a more aggressive exhaust note - ECS - Audi

Sound great and save weight! Eliminate the center resonator on your OE system for a more aggressive exhaust note 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3521607
Mfg#:
024365ECS01KT
In Stock
ON SALE! SAVE 25%
$438.99

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

$329.24 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Ultimate Supercharger Service Kit +

ES#4766224 - 06E145621S3KT - Ultimate Supercharger Service Kit + - Fix all possible coolant leaks for your 3.0T in one click! - Genuine Volkswagen Audi - Audi

Fix all possible coolant leaks for your 3.0T in one click! Up to the 2012 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4766224
Mfg#:
06E145621S3KT
Ships in 1 day
$2529.01

This product was last offered at the strikethrough price on
04-20-2026

$2468.62 USD
This product is lifetime replacement eligible Partial Replacement

Performance High-Flow Air Intake System - 6" Velocity Stack

ES#4045629 - CTS-IT-290R - Performance High-Flow Air Intake System - 6" Velocity Stack - Designed to work in conjunction with the OEM air scoop to seamlessly force cold air into the system - Flowed through a massive 6" velocity stack filter! - CTS - Audi

Designed to work in conjunction with the OEM air scoop to seamlessly force cold air into the system - Flowed through a massive 6" velocity stack filter!

Brand:
CTS - Corporate Logo
ES#:
4045629
Mfg#:
CTS-IT-290R
Back Ordered
Auto Notify
ON SALE! SAVE 15%
$299.99

This product was last offered at the strikethrough price on
07-10-2026

$254.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Complete DL501 Mechatronics Rebuild Kit - With ECS Billet Aluminum Oil Pipes

ES#4908625 - 0b5398009fpKT - Complete DL501 Mechatronics Rebuild Kit - With ECS Billet Aluminum Oil Pipes - Everything needed for a complete Mechatronics repair, plus billet aluminum oil pipes for increase longevity! - Assembled By ECS - Audi

Everything needed for a complete Mechatronics repair, plus billet aluminum oil pipes for increase longevity! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4908625
Mfg#:
0B5398009FPKT
In Stock
ON SALE! SAVE 23%
$1104.99

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

$855.52 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

APR Upgraded Ignition Coil - Blue - Priced Each

ES#4376582 - MS100210 - APR Upgraded Ignition Coil - Blue - Priced Each - Designed to be a direct plug-and-play upgrade to factory coils, providing greater energy output, ensuring a stronger and more consistent spark! - APR - Audi Volkswagen

Designed to be a direct plug-and-play upgrade to factory coils, providing greater energy output, ensuring a stronger and more consistent spark! Call In Or Chat For Best Price! 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
APR - Corporate Logo
ES#:
4376582
Mfg#:
MS100210
In Stock
11% off MSRP

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

$41.57

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

$36.95 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Timing Chain Kit - Ultimate

ES#2992123 - 079109469ALKT1 - Timing Chain Kit - Ultimate - Includes new tensioners, guide rails, chains, & securing hardware to service your timing chain - Assembled By ECS - Audi
ECS Tuning recommends this product.

Includes new tensioners, guide rails, chains, & securing hardware to service your timing chain 10X Entries For Our 25th Anniversary Sweepstakes!
Up to the 2012 model year

Brand:
Assembled By ECS - Corporate Logo
ES#:
2992123
Mfg#:
079109469ALKT1
In Stock
ON SALE! SAVE 23%
$878.99

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

$674.33 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

19" Style 628 Wheels - Set Of Four

ES#2724024 - 628-9KT - 19" Style 628 Wheels - Set Of Four - 19"x8.5" ET35 5x112 - Gloss Gunmetal/Machined Face - Alzor - Audi MINI

19"x8.5" ET35 5x112 - Gloss Gunmetal/Machined Face 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Alzor - Corporate Logo
ES#:
2724024
Mfg#:
628-9KT
In Stock
ON SALE! SAVE 25%
$1300.00

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

$975.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Bilstein B16 PSS9 Suspension System

ES#4420 - 48-086165 - Bilstein B16 PSS9 Suspension System - Height adjustable suspension system offering adjustable compression and rebound to dial in for competition, comfort, or anywhere in between. World-famous Bilstein quality with a limited lifetime warranty! - Bilstein - Audi

Height adjustable suspension system offering adjustable compression and rebound to dial in for competition, comfort, or anywhere in between. World-famous Bilstein quality with a limited lifetime warranty! 2X Entries For Our 25th Anniversary Sweepstakes!
2X Entries For Our Spin To Win Sweepstakes!

Brand:
Bilstein - Corporate Logo
ES#:
4420
Mfg#:
48-086165
Ships on Sep 1, 2026
Auto Notify
31% off MSRP

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

$3423.00

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

$2369.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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