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Audi S4 Performance Parts & Upgrades

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ECS Wheel Spacers - 5mm (Pair)

ES#2167469 - 002411ECS01A05Kt - ECS Wheel Spacers - 5mm (Pair) - Get the right size wheel spacer for your vehicle - ECS - Audi BMW Porsche

Get the right size wheel spacer for your vehicle affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2167469
Mfg#:
002411ECS01A05KT
In Stock
ON SALE! SAVE 25%
$137.99

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

$103.48 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

RS4 K04 Turbochargers - Complete Kit

ES#3658989 - 53049880025/26KT - RS4 K04 Turbochargers - Complete Kit - Comprehensive kit includes the left & right side RS4 K04 turbochargers, 034Motorsport RS4 Inlet Pipe set, and associated installation hardware - Assembled By ECS - Audi

Comprehensive kit includes the left & right side RS4 K04 turbochargers, 034Motorsport RS4 Inlet Pipe set, and associated installation hardware 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#:
3658989
Mfg#:
53049880025/26KT
Ships in 1 Business Day
$3718.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Adjustable Fuel Pressure Regulator

ES#5271 - 001564ECS01 - Adjustable Fuel Pressure Regulator - Works as a replacement for most Bosch fuel pressure regulators. Adjustable from 25psi - 75psi - ECS - Audi Volkswagen

Works as a replacement for most Bosch fuel pressure regulators. Adjustable from 25psi - 75psi affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
5271
Mfg#:
001564ECS01
In Stock
ON SALE! SAVE 15%
$229.99

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

$195.49 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS Wheel Spacer & Bolt Kit - 20mm With Black Conical Seat Bolts

ES#2748198 - ECS10159KTWBC1 - ECS Wheel Spacer & Bolt Kit - 20mm With Black 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!
Fits most aftermarket wheels that require conical seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2748198
Mfg#:
ECS10159KTWBC1
In Stock
ON SALE!
$176.99

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

$168.14 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

V3 Series Coilover Kit - With EDC Deactivation Kit

ES#2619502 - 35210099 - V3 Series Coilover Kit - With EDC Deactivation Kit - The ultimate in coilover technology, featuring double adjustable damping - KW Suspension - Audi

The ultimate in coilover technology, featuring double adjustable damping affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits avant models with factory EDC. Range of lowering is 0.8-1.5" in the front and 0.4-1.5" in the rear.

Brand:
KW Suspension - Corporate Logo
ES#:
2619502
Mfg#:
35210099
Back Ordered
$3684.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

V3 Series Coilover Kit - With EDC Deactivation Kit

ES#2619533 - 35210097 - V3 Series Coilover Kit - With EDC Deactivation Kit - The ultimate in coilover technology, featuring double adjustable damping - KW Suspension - Audi

The ultimate in coilover technology, featuring double adjustable damping affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits sedan models with factory EDC. Range of lowering is 0.8-1.5" in the front and 0.4-1.5" in the rear.

Brand:
KW Suspension - Corporate Logo
ES#:
2619533
Mfg#:
35210097
Back Ordered
$3684.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

DRA Series Wheel Spacers - 20mm (1 Pair)

ES#12121 - 40556654 - DRA Series Wheel Spacers - 20mm (1 Pair) - Add some stance to your vehicle with new spacers - H&R - Audi Mercedes Benz Porsche

Add some stance to your vehicle with new spacers affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
H&R - Corporate Logo
ES#:
12121
Mfg#:
40556654
In Stock
$159.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Bosch Ignition Service Kit

ES#4475329 - 06M905606F7KT - Bosch Ignition Service Kit - Includes six Bosch coil packs and OEM spark plugs to service your ignition system - Assembled By ECS - Audi

Includes six Bosch coil packs and OEM spark plugs to service your ignition system 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#:
4475329
Mfg#:
06M905606F7KT
In Stock
$575.01

This product was last offered at the strikethrough price on
02-14-2026

$367.43 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

APR Strut Tower Brace (B9 Chassis)

ES#4899232 - SUS00027 - APR Strut Tower Brace (B9 Chassis) - Direct bolt-on strut brace engineered to enhance chassis rigidity, reduce flex, and improve handling for a more connected driving experience. - APR - Audi

Direct bolt-on strut brace engineered to enhance chassis rigidity, reduce flex, and improve handling for a more connected driving experience. 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#:
4899232
Mfg#:
SUS00027
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.

$374.99

This product was last offered at the strikethrough price on
06-14-2026

$332.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Ball Seat Stud Conversion Kit

ES#2804036 - 001467ECS01KT - Ball Seat Stud Conversion Kit - Make wheel changes faster and easier - ECS - Audi Volkswagen

Make wheel changes faster and easier affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
For use with ball seat wheels and up to 10mm spacers only

Brand:
ECS - Corporate Logo
ES#:
2804036
Mfg#:
001467ECS01KT
In Stock
ON SALE!
$201.99

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

$191.89 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Single Mass Steel Flywheel - (21lb)

ES#3195802 - SBC0504 - Single Mass Steel Flywheel - (21lb) - Upgrade your flywheel to handle higher horsepower/torque - South Bend Clutch - Audi

Upgrade your flywheel to handle higher horsepower/torque affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
South Bend Clutch - Corporate Logo
ES#:
3195802
Mfg#:
SBC0504
Ships in 1 Business Day
$910.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Harmonic Damper Crankshaft Pulley

ES#3234500 - 651211 - Harmonic Damper Crankshaft Pulley - Provides broad range control of destructive crankshaft torsional vibration for optimum horsepower and durability - Fluidampr - Audi

Provides broad range control of destructive crankshaft torsional vibration for optimum horsepower and durability affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Fluidampr - Corporate Logo
ES#:
3234500
Mfg#:
651211
In Stock at Vendor
$518.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Wheel Spacer & Bolt Kit - 15mm With Ball Seat Bolts

ES#2603081 - 002411ECS03AKT2 - Wheel Spacer & Bolt Kit - 15mm With Ball Seat Bolts - Complete kit for two wheels, includes everything you need to install spacers - ECS - Audi

Complete kit for two wheels, includes everything you need to install spacers affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Fits OEM wheels, or wheels that use OEM ball seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2603081
Mfg#:
002411ECS03AKT2
Ships on Jul 9, 2026
Auto Notify
ON SALE! SAVE 25%
$171.99

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

$128.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

X34 Carbon Fiber Full Intake System

ES#4005393 - 034-108-1029 - X34 Carbon Fiber Full Intake System - Delivers improved power, sound, and acceleration to B9 Audi S4/S5 owners in a clean OEM+ package! - 034Motorsport - Audi

Delivers improved power, sound, and acceleration to B9 Audi S4/S5 owners in a clean OEM+ package! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
4005393
Mfg#:
034-108-1029
Ships in 2 Business Days
$1201.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Adjustable Front Upper Control Arm Kit

ES#3639298 - 81353 - Adjustable Front Upper Control Arm Kit - Corrects camber to eliminate inner tire wear - SPC - Audi Volkswagen

Corrects camber to eliminate inner tire wear affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
SPC - Corporate Logo
ES#:
3639298
Mfg#:
81353
Ships in 4 Business Days
$899.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cold Air Intake Stage 1

ES#2192982 - CI100023 - Cold Air Intake Stage 1 - Looks as great as it performs - APR - Audi

Looks as great as it performs 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!
CARB certified for sale in all 50 states

Brand:
APR - Corporate Logo
ES#:
2192982
Mfg#:
CI100023
EO#:
d-783-2
Back Ordered
11% off MSRP

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

$806.99

This product was last offered at the strikethrough price on
06-14-2026

$716.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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