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Audi S4 Most Popular Parts

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ECS Wheel Spacer & Bolt Kit - 15mm With Black Ball Seat Bolts

ES#2748193 - ECS10157KTWB1 - ECS Wheel Spacer & Bolt Kit - 15mm With Black Ball Seat Bolts - Includes everything you need to install spacers on two wheels - ECS - Audi Volkswagen

Includes everything you need to install spacers on two wheels 10X Entries Into Our F80 M3 Sweepstakes
Fits OEM wheels or wheels that require ball seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2748193
Mfg#:
ECS10157KTWB1
In Stock
ON SALE! SAVE 20%
$174.99

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

$139.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Wheel Spacer & Bolt Kit - 10mm With Black Ball Seat Bolts

ES#2748282 - 002411ECS02AKT5 - Wheel Spacer & Bolt Kit - 10mm With Black Ball Seat Bolts - Complete kit for two wheels, includes everything you need to install spacers - ECS - Audi

Complete kit for two wheels, includes everything you need to install spacers 10X Entries Into Our F80 M3 Sweepstakes
Fits OEM wheels, or wheels that use OEM ball seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2748282
Mfg#:
002411ECS02AKT5
In Stock
ON SALE! SAVE 15%
$173.99

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

$147.89 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Sachs Performance XTend Clutch Kit

ES#3449340 - 3000 950 918 - Sachs Performance XTend Clutch Kit - Featuring Sachs Xtend pressure plate, full-face clutch disc, and throw-out bearing - Sachs - Audi
ECS Tuning recommends this product.

Featuring Sachs Xtend pressure plate, full-face clutch disc, and throw-out bearing We Price Match - Give Us A Call or Chat!

Brand:
Sachs - Corporate Logo
ES#:
3449340
Mfg#:
3000 950 918
In Stock
$749.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Ultimate Water Pump Kit

ES#5434868 - 06M121013GKT - Ultimate Water Pump Kit - Keep your cooling system running properly - Genuine Volkswagen Audi - Audi

Keep your cooling system running properly Includes Updated 6-Bolt Water Pump and Pulley

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
5434868
Mfg#:
06M121013GKT
In Stock
$1050.99

This product was last offered at the strikethrough price on
08-14-2026

$1014.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

D1S 6500K XB Xenon Bulb - Pair

ES#4212776 - MM.N.074 - D1S 6500K XB Xenon Bulb - Pair - Quality replacement xenon bulbs from Morimoto - Morimoto - Audi BMW Volkswagen Mercedes Benz MINI

Quality replacement xenon bulbs from Morimoto

Brand:
Morimoto - Corporate Logo
ES#:
4212776
Mfg#:
MM.N.074
In Stock
$94.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

18" Style 881 Wheels - Set Of Four

ES#2678551 - 881AKT4 - 18" Style 881 Wheels - Set Of Four - 18x8.5 ET35 5x112 57.1CB - Silver With Machined Lip - Alzor - Audi Volkswagen

18x8.5 ET35 5x112 57.1CB - Silver With Machined Lip 10X Entries Into Our F80 M3 Sweepstakes
Vehicles with the 'S4' front brake retaining clip are recommended to use 3mm spacers to clear the clip

Brand:
Alzor - Corporate Logo
ES#:
2678551
Mfg#:
881AKT4
In Stock
ON SALE! SAVE 25%
$1176.99

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

$883.26 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B8/B8.5 S4 3.0T Center X-Pipe Kit

ES#3194900 - 003029ecs01KT - Audi B8/B8.5 S4 3.0T Center X-Pipe Kit - Eliminate the center resonator on your OE system for a more aggressive exhaust note - ECS - Audi

Eliminate the center resonator on your OE system for a more aggressive exhaust note 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3194900
Mfg#:
003029ECS01KT
In Stock
ON SALE! SAVE 25%
$458.99

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

$344.24 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

FDS Front-Mount Intercooler Kit - Silver

ES#3470702 - IETPCK1 - FDS Front-Mount Intercooler Kit - Silver - Increase horsepower and eliminate heatsoak - Drop-in intercooler requires no cutting, trimming, or mods! - Integrated Engineering - Audi

Increase horsepower and eliminate heatsoak - Drop-in intercooler requires no cutting, trimming, or mods!

Brand:
Integrated Engineering - Corporate Logo
ES#:
3470702
Mfg#:
IETPCK1
In Stock
$1034.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Performance Aluminum Charge Pipe Kit

ES#4685216 - IETPCK6 - Performance Aluminum Charge Pipe Kit - Eliminate factory bottlenecks and weak plastic materials for increased flow and strength. - Integrated Engineering - Audi

Eliminate factory bottlenecks and weak plastic materials for increased flow and strength.

Brand:
Integrated Engineering - Corporate Logo
ES#:
4685216
Mfg#:
IETPCK6
In Stock
$447.99 USD
Free Shipping

IE Cat-Back Exhaust System - B9/B9.5 S4

ES#4709360 - IEEXCK5 - IE Cat-Back Exhaust System - B9/B9.5 S4 - Delivers a truly aggressive exhaust note without any annoying drone or rasp - Integrated Engineering - Audi

Delivers a truly aggressive exhaust note without any annoying drone or rasp

Brand:
Integrated Engineering - Corporate Logo
ES#:
4709360
Mfg#:
IEEXCK5
In Stock
$1687.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

BKR9EIX Spark Plugs - Set Of Six

ES#3991431 - bkr9eixKT - BKR9EIX Spark Plugs - Set Of Six - The NGK Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling properties. - NGK - Audi

The NGK Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling properties. We Price Match - Give Us A Call or Chat!
Recommended to be used by various tuners when paired with performance software - recommended gap of .024” +/- .002”

Brand:
NGK - Corporate Logo
ES#:
3991431
Mfg#:
BKR9EIXKT
In Stock
$90.99

This product was last offered at the strikethrough price on
09-15-2026

$56.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Top Tec 1800 Automatic Transmission Fluid - 20 Liters

ES#4375742 - 20034 - Top Tec 1800 Automatic Transmission Fluid - 20 Liters - Fully synthetic leading-edge, high-performance automatic transmission fluid - Liqui-Moly - Audi BMW Volkswagen

Fully synthetic leading-edge, high-performance automatic transmission fluid 10X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Liqui-Moly - Corporate Logo
ES#:
4375742
Mfg#:
20034
In Stock
52% off MSRP

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

$416.99

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

$200.00 USD
Free Shipping

Audi B9 (S4/S5/SQ5) – Pure750 Upgraded Turbocharger

ES#4642701 - PURE-30T750KT - Audi B9 (S4/S5/SQ5) Pure750 Upgraded Turbocharger - Crank up your B9 over 700+awhp with this kit! Price includes a $800.00 refundable core charge. - Pure Turbos - Audi

Crank up your B9 over 700+awhp with this kit! Price includes a $800.00 refundable core charge.

Brand:
Pure Turbos - Corporate Logo
ES#:
4642701
Mfg#:
PURE-30T750KT
Ships on Nov 4, 2026
$3426.99

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

$3300.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Adjustable Metal Extended Slave Cylinder

ES#4819123 - SLV01A0 - Adjustable Metal Extended Slave Cylinder - THE solution to the B8/8.5 Push Clutch to Start issue - Includes 3 different rods (stock, extended, very extended) - JXB Performance - Audi

THE solution to the B8/8.5 Push Clutch to Start issue - Includes 3 different rods (stock, extended, very extended)

Brand:
JXB Performance - Corporate Logo
ES#:
4819123
Mfg#:
SLV01A0
In Stock
$239.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Complete Rear Differential Mount Insert Kit

ES#2992521 - 008288ecs01KT - Complete Rear Differential Mount Insert Kit - Increase drivetrain rigidity and response! - ECS - Audi Porsche

Increase drivetrain rigidity and response! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
2992521
Mfg#:
008288ECS01KT
In Stock
ON SALE! SAVE 25%
$196.99

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

$147.74 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

IE 3.0T High Pressure Fuel Pump (HPFP) Upgrade

ES#4040277 - IEFUVJ1 - IE 3.0T High Pressure Fuel Pump (HPFP) Upgrade - The IE HPFP Upgrade is the missing link to provide enough fuel for dual pulley setups attempting big power on higher octane fuels. - Integrated Engineering - Audi

The IE HPFP Upgrade is the missing link to provide enough fuel for dual pulley setups attempting big power on higher octane fuels.

Brand:
Integrated Engineering - Corporate Logo
ES#:
4040277
Mfg#:
IEFUVJ1
In Stock
$1049.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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