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Audi S4 Most Popular Parts

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Billet Diverter Valve - Polished

ES#3183558 - 034-145-5000-ALU - Billet Diverter Valve - Polished - High-performance spring and piston design is both durable and a performer! - 034Motorsport - Audi Volkswagen

High-performance spring and piston design is both durable and a performer! 2X Entries Into Our F80 M3 Sweepstakes
2 required

Brand:
034Motorsport - Corporate Logo
ES#:
3183558
Mfg#:
034-145-5000-ALU
In Stock
$128.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

19" Style 628 Wheels - Set Of Four

ES#4324952 - 628-14KT1 - 19" Style 628 Wheels - Set Of Four - 19x8.5 ET35 5x112 57.1CB - Matte Gunmetal/Machined Face - Alzor - Audi Volkswagen

19x8.5 ET35 5x112 57.1CB - Matte Gunmetal/Machined Face 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Alzor - Corporate Logo
ES#:
4324952
Mfg#:
628-14KT1
Ships on Jan 11, 2027
ON SALE! SAVE 25%
$1310.00

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

$983.25 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

IE TrueFlex Sensor Kit For Audi B9 S4, S5, SQ5

ES#4830270 - IEELCK2 - IE TrueFlex Sensor Kit For Audi B9 S4, S5, SQ5 - Plug-&-play kit for iE B9/B9.5 3.0T TrueFlex Tunes - Integrated Engineering - Audi

Plug-&-play kit for iE B9/B9.5 3.0T TrueFlex Tunes

Brand:
Integrated Engineering - Corporate Logo
ES#:
4830270
Mfg#:
IEELCK2
In Stock
$461.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ECS Billet Aluminum Sun Visor Clips - Pair

ES#4623665 - 017491laKT - ECS Billet Aluminum Sun Visor Clips - Pair - Never break another hook on your sun visor clip again! - ECS - Audi

Never break another hook on your sun visor clip again! 10X Entries Into Our F80 M3 Sweepstakes
Fits sedan and avant models

Brand:
ECS - Corporate Logo
ES#:
4623665
Mfg#:
017491LAKT
In Stock
ON SALE! SAVE 25%
$73.99

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

$55.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Stage 3+ Clutch Kit

ES#2778072 - SA303F-3 - Stage 3+ Clutch Kit - Full faced carbon semi-metallic disc with a torque rating of 595ft/lbs - Spec Clutches - Audi

Full faced carbon semi-metallic disc with a torque rating of 595ft/lbs

Brand:
Spec Clutches - Corporate Logo
ES#:
2778072
Mfg#:
SA303F-3
In Stock
$1109.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Billet PCV Vent Tube (06E103213)

ES#4932252 - 057381LA01 - Billet PCV Vent Tube (06E103213) - A durable upgrade over the failure-prone plastic OEM tube! - ECS - Audi

A durable upgrade over the failure-prone plastic OEM tube! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
4932252
Mfg#:
057381LA01
In Stock
ON SALE! SAVE 20%
$52.99

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

$42.39 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS "Stage 4" Front Big Brake Kit - B5/B6/B7/C5

ES#1896 - B5S4S4BBKRXS - ECS "Stage 4" Front Big Brake Kit - B5/B6/B7/C5 - Enhance braking performance with this plug-and-play upgrade! Featuring massive 6-piston calipers, lightweight 2-piece brake rotors, and all components needed for installation. - ECS - Audi

Enhance braking performance with this plug-and-play upgrade! Featuring massive 6-piston calipers, lightweight 2-piece brake rotors, and all components needed for installation. 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
1896
Mfg#:
B5S4S4BBKRXS
In Stock
ON SALE!
$2039.99

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

$1937.99 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Street Sport Motor Mounts

ES#4830891 - CTS-EM-MQL-60D - Street Sport Motor Mounts - Redefine the balance between comfort and performance - CTS - Audi

Redefine the balance between comfort and performance

Brand:
CTS - Corporate Logo
ES#:
4830891
Mfg#:
CTS-EM-MQL-60D
Ships on Nov 20, 2026
ON SALE! SAVE 15%
$349.99

This product was last offered at the strikethrough price on
09-29-2026

$297.49 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Oil Service Kit 0w-30

ES#4680251 - 22158KT - Oil Service Kit 0w-30 - Includes Top Tech 4210 0w-30 504/507 Synthetic Engine Oil and filter. - Assembled By ECS - Audi

Includes Top Tech 4210 0w-30 504/507 Synthetic Engine Oil and filter. 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
4680251
Mfg#:
22158KT
In Stock
ON SALE!
$158.99

This product was last offered at the strikethrough price on
09-14-2026

$154.39 USD
Free Shipping
on orders $49 and up

Billet Performance Rear Sway Bar End Links - Audi B8/Porsche Macan

ES#4043135 - 025180ECS02 - Billet Performance Rear Sway Bar End Links - Audi B8/Porsche Macan - Replace the flimsy stock plastic and rubber units - ECS - Audi Porsche

Replace the flimsy stock plastic and rubber units 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
4043135
Mfg#:
025180ECS02
In Stock
ON SALE! SAVE 20%
$224.99

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

$179.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Dynamic+ Adjustable Rear Sway Bar

ES#3241098 - 034-402-1010 - Dynamic+ Adjustable Rear Sway Bar - Designed to combat understeer while reducing body roll under hard cornering! - 034Motorsport - Audi

Designed to combat understeer while reducing body roll under hard cornering! 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
3241098
Mfg#:
034-402-1010
In Stock
$354.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Water Pump - 6 Bolt

ES#4900410 - 06M121013G - Water Pump - 6 Bolt - New water pump. Does not include pulley - Genuine Volkswagen Audi - Audi

New water pump. Does not include pulley

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4900410
Mfg#:
06M121013G
In Stock
7% off MSRP

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

$236.24

This product was last offered at the strikethrough price on
08-13-2026

$219.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Billet Engine oil Dipstick - black Anodized

ES#3138234 - 005259ECS02-02 - Billet Engine oil Dipstick - black Anodized - A more durable and aesthetically pleasing addition to your engine bay - ECS - Audi

A more durable and aesthetically pleasing addition to your engine bay 10X Entries Into Our F80 M3 Sweepstakes

From the 2013 model year

Brand:
ECS - Corporate Logo
ES#:
3138234
Mfg#:
005259ECS02-02
In Stock
ON SALE! SAVE 25%
$99.99

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

$74.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

B9 S4/S5 Turbo Inlet Pipe

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!

Brand:
Integrated Engineering - Corporate Logo
ES#:
4419077
Mfg#:
IEINCK4
Ships in 1 Business Day
$177.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

AWE ColdFront Intercooler - Audi B9 S4/S5 3.0T

ES#4044047 - 4510-11060 - AWE ColdFront Intercooler - Audi B9 S4/S5 3.0T - Offers a 130% increase in frontal surface area and a massive 83% increase in volume over the factory B9 intercooler - AWE - Audi

Offers a 130% increase in frontal surface area and a massive 83% increase in volume over the factory B9 intercooler 2X Entries Into Our F80 M3 Sweepstakes

Brand:
AWE - Corporate Logo
ES#:
4044047
Mfg#:
4510-11060
In Stock
5% off MSRP

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

$994.99

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

$945.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Electronic Damping Cancellation Kit

ES#2608438 - 68510144 - Electronic Damping Cancellation Kit - Keep warning lights off with suspension upgrades - KW Suspension - Audi Porsche

Keep warning lights off with suspension upgrades

Brand:
KW Suspension - Corporate Logo
ES#:
2608438
Mfg#:
68510144
In Stock
$503.95 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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