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Audi S4 Most Popular Parts

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APR Iridium Pro Spark Plugs With Ignition Coils - Set Of 6

ES#4905912 - Z1004081W6ICKT - APR Iridium Pro Spark Plugs With Ignition Coils - Set Of 6 - Unleash Your Engine's Potential with APR - APR - Audi Porsche

Unleash Your Engine's Potential with APR Call In Or Chat For Best Price! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
APR - Corporate Logo
ES#:
4905912
Mfg#:
Z1004081W6ICKT
In Stock
$460.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 S4/A4 Trunk Spoiler - Gloss Black

ES#3981207 - 028801ECS01 - Audi B9 S4/A4 Trunk Spoiler - Gloss Black - Add some aggressive styling to your Audi! - ECS - Audi

Add some aggressive styling to your Audi! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Requires removal of the factory trunk spoiler

Brand:
ECS - Corporate Logo
ES#:
3981207
Mfg#:
028801ECS01
In Stock
ON SALE! SAVE 37%
$284.99

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

$180.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front and Rear Premium Ceramic Pad Kit

ES#4491572 - 8k0698151hKT - Front and Rear Premium Ceramic Pad Kit - Brembo NAO Ceramic pads are designed to deliver improved comfort and reduced pad wear - Brembo - Audi

Brembo NAO Ceramic pads are designed to deliver improved comfort and reduced pad wear affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Brembo - Corporate Logo
ES#:
4491572
Mfg#:
8K0698151HKT
In Stock
$180.99

This product was last offered at the strikethrough price on
01-21-2026

$128.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

18" Style 881 Wheels - Set Of Four

ES#2598318 - 881AKT - 18" Style 881 Wheels - Set Of Four - 18"x8.5" ET45 5x112 57.1CB - Hyper Silver/Machined Lip - Alzor - Audi Volkswagen

18"x8.5" ET45 5x112 57.1CB - Hyper Silver/Machined Lip affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Alzor - Corporate Logo
ES#:
2598318
Mfg#:
881AKT
In Stock
ON SALE! SAVE 25%
$1176.99

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

$882.51 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Oil Separator/Pressure Control Valve (PCV)

ES#4620653 - 06E103547AH - Oil Separator/Pressure Control Valve (PCV) - Located beneath the supercharger compressor - Hengst - Audi
ECS Tuning recommends this product.

Located beneath the supercharger compressor affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
Fits from the 2013 model year

Brand:
Hengst - Corporate Logo
ES#:
4620653
Mfg#:
06E103547AH
Ships in 8 Business Days
$165.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Bilstein B14 PSS Suspension System

ES#2984041 - 47-119444 - Bilstein B14 PSS Suspension System - Height adjustable suspension system with performance valving and application specific, progressive rate coil springs. World-famous Bilstein quality with a limited lifetime warranty! - Bilstein - Audi

Height adjustable suspension system with performance valving and application specific, progressive rate coil springs. World-famous Bilstein quality with a limited lifetime warranty! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Dynamic Ride Control (DRC) must be removed. Fits sedan, avant, and cabriolet models

Brand:
Bilstein - Corporate Logo
ES#:
2984041
Mfg#:
47-119444
In Stock
31% off MSRP

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

$1791.00

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

$1239.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Dual Clutch Gear Oil 8100 - 5 Liter

ES#4158488 - 20116 - Dual Clutch Gear Oil 8100 - 5 Liter - Transmission fluid for your DSG or PDK equipped vehicle - Liqui-Moly - Audi BMW Volkswagen Porsche

Transmission fluid for your DSG or PDK equipped vehicle affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Liqui-Moly - Corporate Logo
ES#:
4158488
Mfg#:
20116
In Stock
36% off MSRP

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

$131.99

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

$84.99 USD
Free Shipping
on orders $49 and up

Shocks & Struts Set - Sport B8

ES#2724033 - 8T0413031AFKT - Shocks & Struts Set - Sport B8 - Recommended for vehicles with lowering springs - Bilstein - Audi

Recommended for vehicles with lowering springs affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Vehicles equipped with Electronic Damping Control (EDC) will lose shock dampening and receive a system error code

Brand:
Bilstein - Corporate Logo
ES#:
2724033
Mfg#:
8T0413031AFKT
Ships on Sep 3, 2026
Auto Notify
$1095.99

This product was last offered at the strikethrough price on
05-22-2026

$900.00 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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3678755
Mfg#:
06M129041
In Stock
8% 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
06-07-2026

$172.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Build Your Own Audi B8/8.5 S4 3.0T Valved Cat Back Exhaust System - Stainless

ES#4488022 - 008553ECS01 - Build Your Own Audi B8/8.5 S4 3.0T Valved Cat Back Exhaust System - Stainless - Experience your driving passion with our ECS Valved Exhaust System and control your sound with our valved muffler design - ECS - Audi

Experience your driving passion with our ECS Valved Exhaust System and control your sound with our valved muffler design affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
10X Entries For Our Spin To Win Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4488022
Mfg#:
008553ECS01
In Stock
ON SALE!
Starting at $1305.07 USD
Customize
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. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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
$48.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Separator/Pressure Control Valve (PCV)

ES#4620647 - 06E103547AC - Oil Separator/Pressure Control Valve (PCV) - Located beneath the supercharger compressor - Hengst - Audi Porsche
ECS Tuning recommends this product.

Located beneath the supercharger compressor affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
Up to the 2012 model year

Brand:
Hengst - Corporate Logo
ES#:
4620647
Mfg#:
06E103547AC
In Stock
$130.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Water Pump Kit

ES#4472399 - 06E121018KKT - Water Pump Kit - Includes a new water pump and thermostat - Assembled By ECS - Audi

Includes a new water pump and thermostat affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Fits from the 2013 model year (facelift)

Brand:
Assembled By ECS - Corporate Logo
ES#:
4472399
Mfg#:
06E121018KKT
Ships in 3 Business Days
ON SALE!
$340.99

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

$319.76 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial 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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
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

Density Line Control Arm Kit - Complete

ES#2954049 - 034-401-1002 - Density Line Control Arm Kit - Complete - Complete Density Line Control Arm Kit - Features all front suspension links and new installation hardware. - 034Motorsport - Audi Volkswagen

Complete Density Line Control Arm Kit - Features all front suspension links and new installation hardware. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits from VIN 8D-Y-080001, split is in 2000 model year - For later models with steel uprights/knuckles

Brand:
034Motorsport - Corporate Logo
ES#:
2954049
Mfg#:
034-401-1002
In Stock
$409.00 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! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!

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

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