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Audi S4 Most Popular Parts

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Iridium BKR9EIX Spark Plug - Priced Each

ES#2575952 - BKR9EIX - Iridium BKR9EIX Spark Plug - Priced Each - 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#:
2575952
Mfg#:
BKR9EIX
In Stock
$15.13

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

$9.39 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

HID Headlight Ballast - Priced Each

ES#3437295 - 8K0941597E - HID Headlight Ballast - Priced Each - Replace your failed ballast and get your xenon headlights in working order again. - Hella - Audi Volkswagen

Replace your failed ballast and get your xenon headlights in working order again.

Brand:
Hella - Corporate Logo
ES#:
3437295
Mfg#:
8K0941597E
In Stock
$220.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

TTE710 Turbo Upgrade - B9 S4/S5/SQ5 3.0T

ES#4493300 - TTE10388 - TTE710 Turbo Upgrade - B9 S4/S5/SQ5 3.0T - Pair this with the Integrated Engineering or 034 Motorsports Stage 3 tune for 600+hp! - The Turbo Engineers - Audi

Pair this with the Integrated Engineering or 034 Motorsports Stage 3 tune for 600+hp! Custom tuning software required for installation.

Brand:
The Turbo Engineers - Corporate Logo
ES#:
4493300
Mfg#:
TTE10388
In Stock
$7890.99

This product was last offered at the strikethrough price on
08-31-2026

$5945.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Multi DCTF (Dual Clutch Transmission Fluid) - 1 Liter

ES#4370399 - 109464 - Multi DCTF (Dual Clutch Transmission Fluid) - 1 Liter - Transmission fluid for your DSG or PDK equipped vehicle - Motul - Audi Volkswagen Mercedes Benz Porsche

Transmission fluid for your DSG or PDK equipped vehicle

Brand:
Motul - Corporate Logo
ES#:
4370399
Mfg#:
109464
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.

$25.62

This product was last offered at the strikethrough price on
10-13-2026

$23.06 USD
Free Shipping
on orders $49 and up

B9 S4/S5 Post Throttle Valve Charge Pipe Kit - Wrinkle Red

ES#3579787 - 024313ecs01-02KT - B9 S4/S5 Post Throttle Valve Charge Pipe Kit - Wrinkle Red - Ditch the plastic and increase air flow! - ECS - Audi

Ditch the plastic and increase air flow! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3579787
Mfg#:
024313ECS01-02KT
In Stock
ON SALE! SAVE 20%
$780.99

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

$624.79 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Charcoal Lined Cabin Filter / Fresh Air Filter

ES#3202691 - 8K0819439B - Charcoal Lined Cabin Filter / Fresh Air Filter - The activated charcoal filters odor from reaching the cabin - Hengst - Audi Porsche
ECS Tuning recommends this product.

The activated charcoal filters odor from reaching the cabin 5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat! Hengst is our preferred OEM filtration supplier!

Brand:
Hengst - Corporate Logo
ES#:
3202691
Mfg#:
8K0819439B
In Stock
$17.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Billet X-Brace - Black - Audi B8.5/Porsche Macan

ES#4220368 - 004802la01aKT - Billet X-Brace - Black - Audi B8.5/Porsche Macan - Improve steering feel and handling! - ECS - Audi Porsche

Improve steering feel and handling! 10X Entries Into Our F80 M3 Sweepstakes

Fits Facelift models from the 2013 model year.

Brand:
ECS - Corporate Logo
ES#:
4220368
Mfg#:
004802LA01AKT
Ships on Nov 30, 2026
ON SALE! SAVE 25%
$560.99

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

$420.74 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

D2S 6000K XB 35W HID Bulbs - Pair

ES#4212766 - MM.N.065 - D2S 6000K XB 35W HID Bulbs - 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#:
4212766
Mfg#:
MM.N.065
In Stock
6% off MSRP

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

$69.00

This product was last offered at the strikethrough price on
10-21-2026

$64.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Stainless Steel Brake Rotor Set Screw - Priced Each

ES#257461 - 92010A426 - Stainless Steel Brake Rotor Set Screw - Priced Each - Holds brake rotor to hub when wheel is removed (M6x16). 18-8 stainless material provides added protection against oxidation and corrosion. - ECS - Audi Volkswagen Porsche

Holds brake rotor to hub when wheel is removed (M6x16). 18-8 stainless material provides added protection against oxidation and corrosion. 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
257461
Mfg#:
92010A426
In Stock
ON SALE! SAVE 25%
$3.99

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

$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Heavy-Duty Outer Tie Rod End - Pair

ES#3199969 - 034-406-2026 - Heavy-Duty Outer Tie Rod End - Pair - Feature all-metal construction with a heavy-duty ball and socket assembly - 034Motorsport - Audi

Feature all-metal construction with a heavy-duty ball and socket assembly 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
3199969
Mfg#:
034-406-2026
In Stock
$138.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

19" Style M205 Wheels - Set Of Four

ES#4316106 - m205-1KT - 19" Style M205 Wheels - Set Of Four - 19"x8.5" ET35 66.6CB 5x112 - Hyper Silver - Alzor - Audi MINI

19"x8.5" ET35 66.6CB 5x112 - Hyper Silver 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Alzor - Corporate Logo
ES#:
4316106
Mfg#:
M205-1KT
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

008 Premium Diverter Valve - *Limited Edition* Red*

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* Limited Editions ONLY at ECS Tuning : Limited Stock so Act Fast

Brand:
Forge - Corporate Logo
ES#:
4001248
Mfg#:
FMDV008R
Ships on Feb 12, 2027
$180.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

19" Style 628 Wheels - Set Of Four

ES#2608946 - 628-7KT - 19" Style 628 Wheels - Set Of Four - 19"x8.5" ET45 5x112 66.6CB - Gloss Gunmetal/Machined Face - Alzor - Audi MINI

19"x8.5" ET45 5x112 66.6CB - Gloss Gunmetal/Machined Face 10X Entries Into Our F80 M3 Sweepstakes
Wheel spacers may be necessary for front caliper clearance

Brand:
Alzor - Corporate Logo
ES#:
2608946
Mfg#:
628-7KT
In Stock
ON SALE! SAVE 40%
$1300.00

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

$779.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 S4/S5 3.0T Luft-Technik Intake System

ES#3477816 - 023795ECS06 - Audi B9 S4/S5 3.0T Luft-Technik Intake System - Enhance your engine's performance with gains up to 16 Wheel Horsepower and 15 foot pounds of torque with our ECS Cold Air Intake - ECS - Audi

Enhance your engine's performance with gains up to 16 Wheel Horsepower and 15 foot pounds of torque with our ECS Cold Air Intake 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3477816
Mfg#:
023795ECS06
Ships on Nov 20, 2026
ON SALE! SAVE 20%
$540.99

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

$432.79 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front & Rear Brake Pad Kit - EBC YellowStuff

ES#4159088 - dp42277rKT - Front & Rear Brake Pad Kit - EBC YellowStuff - EBC's premium sport street pad that offers high friction levels and heat fade resistance - EBC - Audi

EBC's premium sport street pad that offers high friction levels and heat fade resistance 2X Entries Into Our F80 M3 Sweepstakes

Brand:
EBC - Corporate Logo
ES#:
4159088
Mfg#:
DP42277RKT
In Stock
$374.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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