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Audi S4 Most Popular Parts

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Front & Rear Performance Brake Service Kit - 2-Piece

ES#4057315 - 023938ecs02KT1 - Front & Rear Performance Brake Service Kit - 2-Piece - Comprehensive kit includes 2-piece rotors, pads, sensors, and set screws - Upgrade your brake system with ECS 2-piece rotors and EBC Yellow Brake Pads! - Assembled By ECS - Audi

Comprehensive kit includes 2-piece rotors, pads, sensors, and set screws - Upgrade your brake system with ECS 2-piece rotors and EBC Yellow Brake Pads! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4057315
Mfg#:
023938ECS02KT1
In Stock
ON SALE!
$1949.99

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

$1889.54 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS Tuning Billet Engine Oil Dipstick - Black Anodized

ES#3545565 - 023954ECS01-02 - ECS Tuning Billet Engine Oil Dipstick - Black Anodized - A beautiful addition and durable upgrade for your engine - ECS - Audi

A beautiful addition and durable upgrade for your engine 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3545565
Mfg#:
023954ECS01-02
In Stock
ON SALE! SAVE 25%
$104.99

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

$78.74 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

APR Upgraded Ignition Coil - Red - Set of Six

ES#4376586 - MS100208-6KT - APR Upgraded Ignition Coil - Red - Set of Six - 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

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!

To be used with the 2.0T coil pack conversion kits.

Brand:
APR - Corporate Logo
ES#:
4376586
Mfg#:
MS100208-6KT
In Stock
$221.70 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rear V5 Drilled & Slotted Brake Rotors - Set (330x22)

ES#4668331 - 4H0615601Q-XS - Rear V5 Drilled & Slotted Brake Rotors - Set (330x22) - Precision manufactured for consistent stopping power during high performance driving. Featuring a matte black zinc coating for corrosion protection. - ECS - Audi

Precision manufactured for consistent stopping power during high performance driving. Featuring a matte black zinc coating for corrosion protection. 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4668331
Mfg#:
4H0615601Q-XS
In Stock
ON SALE!
$302.99

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

$293.90 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

CTS Turbo B9 S4/S5 High Flow Cat

ES#4043052 - CTS-EXH-TP-0009C - CTS Turbo B9 S4/S5 High Flow Cat - CTS Turbo high flow cat is made to maximize exhaust flow for highest power gains - Do not compromise performance and sound with factory parts - Unleash your B9 S4/S5 3.0T Potential! - CTS - Audi

CTS Turbo high flow cat is made to maximize exhaust flow for highest power gains - Do not compromise performance and sound with factory parts - Unleash your B9 S4/S5 3.0T Potential!

Brand:
CTS - Corporate Logo
ES#:
4043052
Mfg#:
CTS-EXH-TP-0009C
In Stock
ON SALE! SAVE 15%
$699.99

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

$594.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Upgraded Aluminum Coolant Pipe - Return (06E121065N)

ES#4376374 - 06E 121065N - Upgraded Aluminum Coolant Pipe - Return (06E121065N) - Main return pipe that connects to the heater core hoses and the engine. Made from high-grade Aluminum vs OEM Plastic! - URO Premium - Audi

Main return pipe that connects to the heater core hoses and the engine. Made from high-grade Aluminum vs OEM Plastic! 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
URO Premium - Corporate Logo
ES#:
4376374
Mfg#:
06E 121065N
In Stock
$59.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front & Rear Brake Service Kit

ES#4780159 - 4M0615301ANAKT - Front & Rear Brake Service Kit - Featuring Zimmermann rotors and ECS DD23 Ceramic Brake Pads - Includes stainless set screws, brake wear sensors, and silicone brake lubricant. - Assembled By ECS - Audi

Featuring Zimmermann rotors and ECS DD23 Ceramic Brake Pads - Includes stainless set screws, brake wear sensors, and silicone brake lubricant. 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4780159
Mfg#:
4M0615301ANAKT
In Stock
ON SALE! SAVE 23%
$871.99

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

$667.23 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Magnetic Oil Drain Plug - With 10 Copper Washers

ES#2804343 - 001196ECS01AKT2 - Magnetic Oil Drain Plug - With 10 Copper Washers - Capture harmful particles to prevent wear. M14x1.5 - ECS - Audi Volkswagen MINI Porsche

Capture harmful particles to prevent wear. M14x1.5 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2804343
Mfg#:
001196ECS01AKT2
In Stock
ON SALE! SAVE 25%
$30.99

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

$23.24 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Res-X Front Resonator Delete

ES#4845334 - 034-105-7060 - Res-X Front Resonator Delete - Unleash a throaty growl under hard acceleration! - 034Motorsport - Audi

Unleash a throaty growl under hard acceleration!

Brand:
034Motorsport - Corporate Logo
ES#:
4845334
Mfg#:
034-105-7060
In Stock
$303.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

18" Style 628 Wheels - Set Of Four

ES#2207752 - 628-2 - 18" Style 628 Wheels - Set Of Four - 18"x8" ET45 5x112 - Gunmetal/Machined Face - Alzor - Audi Volkswagen

18"x8" ET45 5x112 - Gunmetal/Machined Face 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Alzor - Corporate Logo
ES#:
2207752
Mfg#:
628-2
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

VW MK8 2.0T / Audi 3.0T Diverter Valve Spacer - Clear Anodized

ES#4033242 - 028495ECS01 - VW MK8 2.0T / Audi 3.0T Diverter Valve Spacer - Clear Anodized - Let your turbo blow off some air for an exhilarating driving experience! - ECS - Audi Volkswagen

Let your turbo blow off some air for an exhilarating driving experience! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4033242
Mfg#:
028495ECS01
In Stock
ON SALE! SAVE 25%
$89.99

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

$67.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

B9 S4/S5 Downpipe & Resonator Delete Kit

ES#4715650 - 016752la02KT - B9 S4/S5 Downpipe & Resonator Delete Kit - No cutting required, easy-to-install downpipes with resonator deletes for your factory cat back exhaust. - ECS - Audi

No cutting required, easy-to-install downpipes with resonator deletes for your factory cat back exhaust. 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4715650
Mfg#:
016752LA02KT
In Stock
ON SALE!
$479.99

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

$455.99 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 For Our 25th Anniversary 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

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 For Our 25th Anniversary Sweepstakes!
Requires the use of 15mm spacers and extended 45mm conical seat wheel bolts to clear the front caliper.

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

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

Ultimate Supercharger Service Kit

ES#4766247 - 06E145621SAF2KT - Ultimate Supercharger Service Kit - Fix all possible coolant leaks for your 3.0T in one click! - Assembled By ECS - Audi

Fix all possible coolant leaks for your 3.0T in one click! 10X Entries For Our 25th Anniversary Sweepstakes!
Fits from the 2013 model year (facelift)

Brand:
Assembled By ECS - Corporate Logo
ES#:
4766247
Mfg#:
06E145621SAF2KT
In Stock
ON SALE!
$882.44

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

$833.85 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

19" Style 628 Wheels - Set Of Four

ES#4324951 - 628-14KT - 19" Style 628 Wheels - Set Of Four - 19x8.5 ET35 5x112 66.6CB - Matte Gunmetal/Machined Face - Alzor - Audi MINI

19x8.5 ET35 5x112 66.6CB - Matte Gunmetal/Machined Face 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Alzor - Corporate Logo
ES#:
4324951
Mfg#:
628-14KT
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

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