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Audi S4 Most Popular Parts

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ES#4690740 - MS100255 - APR Carbon Fiber Engine Cover  - A full carbon fiber engine cover to enhance your engine bay! - APR - Audi

A full carbon fiber engine cover to enhance your engine bay! 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#:
4690740
Mfg#:
MS100255
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.

$1037.95

This product was last offered at the strikethrough price on
04-28-2026

$921.95 USD
Free Shipping
ES#4907823 - B85-9 - Jackal Motorsports Tune - Includes Jackal Tuning Cable & TCU Tune - Gains from 86 WHP/64 WTQ on Stage 1 up to 185 WHP/193 WTQ on Stage 2+ E40 - Jackal Motorsports - Audi

Gains from 86 WHP/64 WTQ on Stage 1 up to 185 WHP/193 WTQ on Stage 2+ E40 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with DSG transmission only

Brand:
Jackal Motorsports - Corporate Logo
ES#:
4907823
Mfg#:
B85-9
Ships in 2 Business Days
$810.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3177923 - IEINCC1-3A - IE Replacement 5" Air Filter For IE Intake Kits - This is a direct replacement filter for all IE cold air intakes with a 5" velocity stack on the heat shield. This filter is used on the majority of all IE intakes. - Integrated Engineering - Audi Volkswagen

This is a direct replacement filter for all IE cold air intakes with a 5" velocity stack on the heat shield. This filter is used on the majority of all IE intakes. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Integrated Engineering - Corporate Logo
ES#:
3177923
Mfg#:
IEINCC1-3A
Ships in 4 Business Days
$54.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4419077 - IEINCK4 - B9 S4/S5 Turbo Inlet Pipe   - Take full advantage of all available space with a unique shape to maximize airflow! - Integrated Engineering - Audi

Take full advantage of all available space with a unique shape to maximize airflow! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Integrated Engineering - Corporate Logo
ES#:
4419077
Mfg#:
IEINCK4
In Stock
$177.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2723130 - 002686ECSKT -  2.0T Coil Pack Conversion Kit - Anodized Black Plates with Red Coil Packs - Unload your ICM's and update your 2.7T ignition system! - ECS - Audi

Unload your ICM's and update your 2.7T ignition system! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2723130
Mfg#:
002686ECSKT
In Stock
ON SALE! SAVE 20%
$679.99

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

$543.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#2092354 - 35210075 - KW V3 Series Coilover Kit - The ultimate in coilover technology featuring double adjustable dampening - KW Suspension - Audi

The ultimate in coilover technology featuring double adjustable dampening affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits sedan models without factory EDC. Range of lowering is 0.8-1.5" in the front and 0.4-1.5" in the rear.

Brand:
KW Suspension - Corporate Logo
ES#:
2092354
Mfg#:
35210075
Back Ordered
$3394.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#2602983 - 000690ECS01AKT - Front 2-Piece Brake Rotors - Pair (345x30) - Direct bolt-on replacement - 25% less weight! - ECS - Audi Porsche

Direct bolt-on replacement - 25% less weight! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2602983
Mfg#:
000690ECS01AKT
In Stock
ON SALE! SAVE 10%
$999.99

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

$899.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3557373 - 8136181362KT - Adjustable Front Upper Control Arm Kit - Correct your camber and eliminate inner tire wear - Complete kit for both sides! - SPC - Audi

Correct your camber and eliminate inner tire wear - Complete kit for both sides! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
SPC - Corporate Logo
ES#:
3557373
Mfg#:
8136181362KT
Ships in 4 Business Days
$899.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3537753 - 025997ECS0622KT - Performance Front & Rear Brake Service Kit - Audi B8 S4/S5 - Featuring ECS V5 Dimpled/Drilled & Slotted rotors and ECS EP24 Enthusiast Performance pads - Assembled By ECS - Audi

Featuring ECS V5 Dimpled/Drilled & Slotted rotors and ECS EP24 Enthusiast Performance pads affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
3537753
Mfg#:
025997ECS0622KT
Ships in 2 Business Days
ON SALE! SAVE 10%
$1151.99

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

$1036.79 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4905500 - Z1004081 - APR Iridium Pro Spark Plugs - Priced Each  - Designed for high performance / tuned vehicle applications - APR - Audi Porsche

Designed for high performance / tuned vehicle applications 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#:
4905500
Mfg#:
Z1004081
In Stock
10% off MSRP

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

$28.99

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

$25.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3713982 - 028446ECS01 - Audi B8/B8.5 A4/S4 Rear Window Spoiler - Gloss Black - Add subtle styling to complete the look! - ECS - Audi

Add subtle styling to complete the look! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3713982
Mfg#:
028446ECS01
In Stock
ON SALE! SAVE 19%
$197.99

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

$160.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4338534 - 007041la01KT - B9.5 Mid-Facelift S4/A4 S-Line 3 Piece Front Lip - Gloss Black - Upgrade your exterior styling! - ECS - Audi

Upgrade your exterior styling! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Only Fits 2019 Mid-Facelift Bumpers

Brand:
ECS - Corporate Logo
ES#:
4338534
Mfg#:
007041LA01KT
In Stock
ON SALE! SAVE 25%
$344.99

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

$258.01 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4039417 - 8K0407613B - Wheel Hub - Priced Each - Does not include wheel bearing - Vaico - Audi

Does not include wheel bearing affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
4039417
Mfg#:
8K0407613B
In Stock
$72.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3697648 - 027963ECS01 - Audi B8.5 S4 / A4 S-Line Gloss Black Grille Accent Set - Facelift - Upgrade your exterior styling - ECS - Audi

Upgrade your exterior styling affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Fits Facelift models from the 2013 model year

Brand:
ECS - Corporate Logo
ES#:
3697648
Mfg#:
027963ECS01
In Stock
ON SALE! SAVE 26%
$267.99

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

$199.23 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4001248 - FMDV008R - 008 Premium Diverter Valve - *Limited Edition* Red*  - Smaller, tougher and tuneable! *Limited edition red finish* - Forge - Audi Volkswagen Porsche

Smaller, tougher and tuneable! *Limited edition red finish* affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Limited Editions ONLY at ECS Tuning : Limited Stock so Act Fast

Brand:
Forge - Corporate Logo
ES#:
4001248
Mfg#:
FMDV008R
Ships in 4 Business Days
$180.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3979295 - 027567ecs01KT - Audi B9 A4/S4 Transmission Street Shield Aluminum Skid Plate - Protect your transmission pan and improve aerodynamics - ECS - Audi

Protect your transmission pan and improve aerodynamics affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3979295
Mfg#:
027567ECS01KT
In Stock
ON SALE! SAVE 15%
$347.99

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

$295.79 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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