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Audi S4 Performance Parts & Upgrades

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ES#3557465 - 651201C - Build-Your-Own 3.0T Fluidampr Kit - An essential upgrade for 3.0T Supercharged vehicles! - Fluidampr - Audi Porsche

An essential upgrade for 3.0T Supercharged vehicles! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Fluidampr - Corporate Logo
ES#:
3557465
Mfg#:
651201C
Back Ordered
Starting at $649.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2063857 - ECS10611KTWB -  ECS Wheel Spacer & Bolt Kit - 7mm With Ball Seat Bolts - Includes everything you need to install spacers on two wheels - ECS - Audi Volkswagen

Includes everything you need to install spacers on two wheels affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Please measure your hub protrusion to ensure it will still make contact with the center of the wheel. See

Brand:
ECS - Corporate Logo
ES#:
2063857
Mfg#:
ECS10611KTWB
In Stock
ON SALE! SAVE 25%
$143.99

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

$107.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4858179 - 034-106-3030 - 550cc Bosch EV14 Fuel Injector - Priced Each  - The Bosch EV14 550cc fires factory-correct dual spray cones with super-fast response and best atomizaton on the market today. - Bosch - Audi

The Bosch EV14 550cc fires factory-correct dual spray cones with super-fast response and best atomizaton on the market today. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
4858179
Mfg#:
034-106-3030
Ships in 2 Business Days
$107.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3570115 - MS100160 - Wheel Spacer Kit - 3mm (1 Pair)  - 3mm spacers to perfectly dial in your stance or clear your big brake kit! - APR - Audi

3mm spacers to perfectly dial in your stance or clear your big brake kit! 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#:
3570115
Mfg#:
MS100160
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.

$80.99

This product was last offered at the strikethrough price on
06-20-2026

$71.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4691182 - 047330LA01KT - B8/B8.5 A4/S4 Lowering Springs & Installation Kit - Dramatically improve looks and handling with and average lowering up to 1.6" front and rear. Paired with ECS Tuning Cup Kit Installation Kit. - Assembled By ECS - Audi

Dramatically improve looks and handling with and average lowering up to 1.6" front and rear. Paired with ECS Tuning Cup Kit Installation Kit. 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#:
4691182
Mfg#:
047330LA01KT
In Stock
ON SALE!
$652.99

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

$647.68 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4043314 - 2660-13026 - AWE S-FLO Carbon Intake - Audi B8.5 S4/S5 3.0T - Gains of 15 hp and 11 ft-lbs of torque! Allows 34% more airflow over stock, with eye catching carbon fiber engine bay upgrade. - AWE - Audi

Gains of 15 hp and 11 ft-lbs of torque! Allows 34% more airflow over stock, with eye catching carbon fiber engine bay upgrade. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
AWE - Corporate Logo
ES#:
4043314
Mfg#:
2660-13026
Ships on Jul 10, 2026
$659.99

This product was last offered at the strikethrough price on
02-06-2026

$645.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3647477 - ST-AEVI-1106SKT1 - Supertech Inconel Exhaust Valve Kit - +1mm oversized valve head diameter, single groove keeper setup for high RPM use - Includes Supertech valves, single groove keepers and IE valve seals - Assembled By ECS - Audi

+1mm oversized valve head diameter, single groove keeper setup for high RPM use - Includes Supertech valves, single groove keepers and IE valve seals affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
*Oversized valves require extra machine work to the cylinder head.*

Brand:
Assembled By ECS - Corporate Logo
ES#:
3647477
Mfg#:
ST-AEVI-1106SKT1
Back Ordered
$644.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2788499 - 002411ECS04A8KT - Wheel Spacer & Bolt Kit - 8mm with Ball Seat Bolts - Includes everything you need to install our new wheel-centric spacers on two wheels - ECS - Audi

Includes everything you need to install our new wheel-centric spacers on two wheels affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Designed to be used with OE wheels only

Brand:
ECS - Corporate Logo
ES#:
2788499
Mfg#:
002411ECS04A8KT
Ships on Oct 29, 2026
ON SALE!
$134.99

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

$128.24 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

does not include rotor secure screws affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Rennline - Corporate Logo
ES#:
4835418
Mfg#:
CS-143KT
Ships on Aug 3, 2026
$320.00 USD
This product is lifetime replacement eligible Lifetime Replacement
ES#3427273 - CTS-HW-0134 - Supercharger Pulley Installation Kit - Ease the 3.0T supercharger pulley installation process with this install kit - CTS - Audi Porsche

Ease the 3.0T supercharger pulley installation process with this install kit affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
CTS - Corporate Logo
ES#:
3427273
Mfg#:
CTS-HW-0134
Ships in 7 Business Days
$159.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3450991 - 024677ECS01 - Mid Exact-Fit Stainless Steel Brake Lines - Mid set of DOT-compliant lines for an improved pedal feel - ECS - Audi

Mid set of DOT-compliant lines for an improved pedal feel affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3450991
Mfg#:
024677ECS01
In Stock
ON SALE! SAVE 15%
$93.99

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

$79.89 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2834823 - 004113ECS01KT - Ultimate Shift Kit - Audi B8 A4/A5/S5/S5 - Includes the ECS Adjustable Short Throw Shifter paired with BFI's Heavy Weight SCHWARZ Shift Knob - ECS / BFI - Audi

Includes the ECS Adjustable Short Throw Shifter paired with BFI's Heavy Weight SCHWARZ Shift Knob affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
ECS / BFI
ES#:
2834823
Mfg#:
004113ECS01KT
In Stock
$636.98 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#2651917 - PFF3-203x4 - Front Upper Control Arm Bushing Set - Inner - Street - Improves handling and control - Upgrade to a more engaging driving experience - Powerflex - Audi Volkswagen

Improves handling and control - Upgrade to a more engaging driving experience affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Powerflex - Corporate Logo
ES#:
2651917
Mfg#:
PFF3-203X4
In Stock
$126.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#2568227 - ECS10154KTWBC -  ECS Wheel Spacer & Bolt Kit - 5mm With Conical Seat Bolts - Includes everything you need to install spacers on two wheels - ECS - Audi Volkswagen

Includes everything you need to install spacers on two wheels affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Please measure your hub protrusion to ensure it will still make contact with the center of the wheel. See

Brand:
ECS - Corporate Logo
ES#:
2568227
Mfg#:
ECS10154KTWBC
In Stock
ON SALE! SAVE 25%
$140.99

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

$105.74 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#250683 - 002403ECS01A04Kt -  ECS Wheel Spacers - 4mm (Pair) - Exclusively built for your 57.1mm centerbore VW/Audi - ECS - Audi Volkswagen

Exclusively built for your 57.1mm centerbore VW/Audi affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Please measure your hub protrusion to ensure it will still make contact with the center of the wheel. See

Brand:
ECS - Corporate Logo
ES#:
250683
Mfg#:
002403ECS01A04KT
Ships on Aug 26, 2026
ON SALE! SAVE 20%
$87.99

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

$70.39 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#5445005 - 034-302-2627KT - 034Motorsport Dynamic+ StreetSport Front & Rear Brake Pad Set - Semi-metallic pads that offer low dust and noise for comfortable everyday use, while delivering high friction, superior modulation, and exceptional stopping power! - 034Motorsport - Audi

Semi-metallic pads that offer low dust and noise for comfortable everyday use, while delivering high friction, superior modulation, and exceptional stopping power! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
5445005
Mfg#:
034-302-2627KT
In Stock
$632.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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