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Audi S4 Most Popular Parts

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Front 2-Piece Brake Rotors With Exact-Fit Stainless Steel Brake Lines

ES#5386611 - 000690ecs01adbKT - Front 2-Piece Brake Rotors With Exact-Fit Stainless Steel Brake Lines - Upgrade your braking performance and feel with this Doorbusters special, featuring ECS drilled and slotted 2-piece rotors and Exact-Fit stainless steel brake lines - Doorbusters - Audi

Upgrade your braking performance and feel with this Doorbusters special, featuring ECS drilled and slotted 2-piece rotors and Exact-Fit stainless steel brake lines

Brand:
Doorbusters - Corporate Logo
ES#:
5386611
Mfg#:
000690ECS01ADBKT
In Stock
$1148.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 Billet Aluminum Control Ring Kit - NOTCHED - Clear Anodized Small MMI

ES#3690749 - 023770ECS04-01KT - Audi B9 Billet Aluminum Control Ring Kit - NOTCHED - Clear Anodized Small MMI - Set of four billet aluminum trim rings for your climate control, MMI, and volume knobs. - ECS - Audi

Set of four billet aluminum trim rings for your climate control, MMI, and volume knobs. 10X Entries Into Our F80 M3 Sweepstakes USE CODE ECS20 IN CART FOR BEST PRICE

For vehicles without touch sensitive MMI knob

Brand:
ECS - Corporate Logo
ES#:
3690749
Mfg#:
023770ECS04-01KT
In Stock
$129.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Heavy Duty Rubber Rear Shock Mount - Pair

ES#5491423 - 049313LA01 - Heavy Duty Rubber Rear Shock Mount - Pair - Enhance longevity and improve your Audi or Porsche's handling with our in-house designed HD rubber shock mount! - ECS - Audi

Enhance longevity and improve your Audi or Porsche's handling with our in-house designed HD rubber shock mount! 10X Entries Into Our F80 M3 Sweepstakes USE CODE ECS20 IN CART FOR BEST PRICE

Brand:
ECS - Corporate Logo
ES#:
5491423
Mfg#:
049313LA01
In Stock
$105.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

3.0T High-Flow Shorty Exhaust Headers - With Installation Hardware

ES#4907724 - 053829la02-02KT - 3.0T High-Flow Shorty Exhaust Headers - With Installation Hardware - Experience an impressive 48% increase in flow with our ceramic-coated, tubular stainless steel headers! - ECS - Audi

Experience an impressive 48% increase in flow with our ceramic-coated, tubular stainless steel headers! 10X Entries Into Our F80 M3 Sweepstakes USE CODE ECS20 IN CART FOR BEST PRICE

Brand:
ECS - Corporate Logo
ES#:
4907724
Mfg#:
053829LA02-02KT
In Stock
$1170.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ECS Wheel Spacer & Bolt Kit - 15/20mm With Black Ball Seat Bolts

ES#5481182 - ecs10157ktwb1KT - ECS Wheel Spacer & Bolt Kit - 15/20mm With Black Ball Seat Bolts - Includes everything you need to install spacers on four wheels - ECS - Audi Volkswagen

Includes everything you need to install spacers on four wheels 10X Entries Into Our F80 M3 Sweepstakes USE CODE ECS20 IN CART FOR BEST PRICE

Brand:
ECS - Corporate Logo
ES#:
5481182
Mfg#:
ECS10157KTWB1KT
In Stock
$486.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Audi B8 Billet Power Steering Reservoir

ES#5445062 - 046156la07KT - Audi B8 Billet Power Steering Reservoir - Eliminate the grimy, leaky, factory plastic power steering reservoir with a beautiful aluminum component. Upgraded for thermal capacity, performance and extended rack life! - ECS - Audi

Eliminate the grimy, leaky, factory plastic power steering reservoir with a beautiful aluminum component. Upgraded for thermal capacity, performance and extended rack life! 10X Entries Into Our F80 M3 Sweepstakes USE CODE ECS20 IN CART FOR BEST PRICE
Fits pre-facelift models up to the 2012 model year only

Brand:
ECS - Corporate Logo
ES#:
5445062
Mfg#:
046156LA07KT
In Stock
$458.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Performance Caliper Guide Bushing Set With Installation Tool

ES#5481531 - 003326ecs01KT1 - Performance Caliper Guide Bushing Set With Installation Tool - Reduced caliper deflection, enhanced pedal feel, and improved pad wear. An excellent way to improve braking performance. Priced per axle. - ECS - Audi Volkswagen

Reduced caliper deflection, enhanced pedal feel, and improved pad wear. An excellent way to improve braking performance. Priced per axle. 10X Entries Into Our F80 M3 Sweepstakes USE CODE ECS20 IN CART FOR BEST PRICE

Brand:
ECS - Corporate Logo
ES#:
5481531
Mfg#:
003326ECS01KT1
In Stock
$216.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front & Rear V5 Slotted Brake Rotors - Set (345x30/330x22)

ES#5445481 - 4h0615601qsKT - Front & Rear V5 Slotted Brake Rotors - Set (345x30/330x22) - 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 Into Our F80 M3 Sweepstakes USE CODE ECS20 IN CART FOR BEST PRICE

Brand:
ECS - Corporate Logo
ES#:
5445481
Mfg#:
4H0615601QSKT
In Stock
$852.99

This product was last offered at the strikethrough price on
08-07-2026

$832.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

B5 S4 Valved Cat Back Exhaust & Street Shield Aluminum Skid Plate Kit

ES#4751086 - 041750LA01EBKT - B5 S4 Valved Cat Back Exhaust & Street Shield Aluminum Skid Plate Kit - Enhance the sound of your vehicle and keep it safe with a Street Shield Aluminum Skid Plate Kit - Enthusiast Bundles - Audi

Enhance the sound of your vehicle and keep it safe with a Street Shield Aluminum Skid Plate Kit Don't See A Bundle You Want - Give Us A Call Or Chat - We Will Make One!

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4751086
Mfg#:
041750LA01EBKT
In Stock
ON SALE!
$1449.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Thrust Arm Monoball Upgrade Kit - Front Lower, Inner & B9 A4 / S4 Lowering Spring Set

ES#4876603 - 051204LA01EBKT - Thrust Arm Monoball Upgrade Kit - Front Lower, Inner & B9 A4 / S4 Lowering Spring Set - Eliminate deflection caused by stock rubber bushings and Dramatically improve looks and handling with and average lowering up to 1.5" front and rear. - Enthusiast Bundles - Audi

Eliminate deflection caused by stock rubber bushings and Dramatically improve looks and handling with and average lowering up to 1.5" front and rear. Don't See A Bundle You Want - Give Us A Call Or Chat - We Will Make One!

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4876603
Mfg#:
051204LA01EBKT
Ships on Dec 3, 2026
ON SALE!
$652.45 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

B5 S4 Non-Valved Exhaust System & Street Shield Aluminum Skid Plate Kit

ES#4876621 - 041750LAEBKT - B5 S4 Non-Valved Exhaust System & Street Shield Aluminum Skid Plate Kit - Enhance your vehicle's sound and protect vital engine componentry! - Enthusiast Bundles - Audi

Enhance your vehicle's sound and protect vital engine componentry! Don't See A Bundle You Want - Give Us A Call Or Chat - We Will Make One!

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4876621
Mfg#:
041750LAEBKT
In Stock
ON SALE! SAVE 32%
$1169.00

This product was last offered at the strikethrough price on
05-25-2026

$796.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Audi B8 Adjustable Short Throw Shifter & Shift Knob

ES#4751240 - 004113ECS01AEBKT - Audi B8 Adjustable Short Throw Shifter & Shift Knob - Find your perfect setting with 4 steps of throw reduction - Enthusiast Bundles - Audi

Find your perfect setting with 4 steps of throw reduction Don't See A Bundle You Want - Give Us A Call Or Chat - We Will Make One!

Brand:
Enthusiast Bundles - Corporate Logo
ES#:
4751240
Mfg#:
004113ECS01AEBKT
In Stock
$562.97 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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