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Audi A4 Performance Parts & Upgrades

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High Flow High Pressure Fuel Pump

ES#4057584 - 10-127-101C2K - High Flow High Pressure Fuel Pump - New Hitachi fuel pump with Autotech internal upgrades pre-installed for a 5% torque increase and additional 10 bar of fuel rail pressure! - Autotech - Audi

New Hitachi fuel pump with Autotech internal upgrades pre-installed for a 5% torque increase and additional 10 bar of fuel rail pressure!

Brand:
Autotech - Corporate Logo
ES#:
4057584
Mfg#:
10-127-101C2K
Ships in 2 Business Days
$894.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
2167469
Mfg#:
002411ECS01A05KT
Ships on Nov 23, 2026
ON SALE! SAVE 30%
$137.99

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

$96.59 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

DR Series Wheel Spacers (Black) - 12mm (1 Pair)

ES#2731437 - 2455571SW - DR Series Wheel Spacers (Black) - 12mm (1 Pair) - Fine tune your stance and improve handling - H&R - Audi Volkswagen

Fine tune your stance and improve handling We Price Match - Give Us A Call or Chat!
Fits hub height contour up to 13.50mm. Inside wheel bevel = 4.0 x 45 degrees

Brand:
H&R - Corporate Logo
ES#:
2731437
Mfg#:
2455571SW
In Stock
10% off MSRP

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

$109.99

This product was last offered at the strikethrough price on
10-01-2026

$98.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 Carbon Fiber Antenna Cover

ES#3468626 - 024985ECS01 - Audi B9 Carbon Fiber Antenna Cover - Add a unique, lightweight look to your B9 - ECS - Audi

Add a unique, lightweight look to your B9 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
3468626
Mfg#:
024985ECS01
In Stock
ON SALE! SAVE 25%
$100.99

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

$75.74 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

V1 Series Coilover System - Fixed Damping

ES#2091945 - 10210032 - V1 Series Coilover System - Fixed Damping - Variant 1 coilovers offer the best balance between sporty driving and comfort - KW Suspension - Audi

Variant 1 coilovers offer the best balance between sporty driving and comfort Range of lowering is 1.5-2.9" in the front and rear.

Brand:
KW Suspension - Corporate Logo
ES#:
2091945
Mfg#:
10210032
In Stock at Vendor
$1774.00 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 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
5271
Mfg#:
001564ECS01
In Stock
ON SALE!
$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 10X Entries Into Our F80 M3 Sweepstakes
Fits most aftermarket wheels that require conical seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2748198
Mfg#:
ECS10159KTWBC1
In Stock
ON SALE! SAVE 10%
$176.99

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

$159.29 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

iE Performance Engine ECU Tune For Audi B9 A4 2017-2020

ES#5457714 - IESOWG11 - iE Performance Engine ECU Tune For Audi B9 A4 2017-2020 - Unleash up to 424 HP in your 2017-2020 Quattro Audi B9 A4, A5, or Q5 with IE's ECU tune, featuring TrueFlex ethanol support, adjustable anti-lag launch control, and live tuning adjustments right from your smartphone. - Integrated Engineering - Audi

Unleash up to 424 HP in your 2017-2020 Quattro Audi B9 A4, A5, or Q5 with IE's ECU tune, featuring TrueFlex ethanol support, adjustable anti-lag launch control, and live tuning adjustments right from your smartphone. Please see "fitment notes" at the bottom of the description for full vehicle information.

Brand:
Integrated Engineering - Corporate Logo
ES#:
5457714
Mfg#:
IESOWG11
In Stock
Starting at $499.99 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

IE Street/Race Exhaust Camshaft

ES#4361430 - IECVA2-1 - IE Street/Race Exhaust Camshaft - IE Street/Race Exhaust Camshaft for 400+ Horsepower Builds! - Integrated Engineering - Audi Volkswagen

IE Street/Race Exhaust Camshaft for 400+ Horsepower Builds!

Brand:
Integrated Engineering - Corporate Logo
ES#:
4361430
Mfg#:
IECVA2-1
In Stock
$349.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

KW V3 Series Coilover Kit

ES#4056866 - 352100BH - KW V3 Series Coilover Kit - The ultimate in coilover technology, featuring double adjustable damping - KW Suspension - Audi

The ultimate in coilover technology, featuring double adjustable damping For models without factory Electronic Damping Control - For models with 50mm front strut body. Range of lowering is 1.2-2.2" in the front and 1.4-2.4" in the rear.

Brand:
KW Suspension - Corporate Logo
ES#:
4056866
Mfg#:
352100BH
Back Ordered
$3524.00

This product was last offered at the strikethrough price on
10-20-2026

$3494.00 USD
Free Shipping

034Motorsport Front Sway Bar Upgrade

ES#4643527 - 034-402-1029 - 034Motorsport Front Sway Bar Upgrade - Designed to reduce body roll, improve turn-in, reduce understeer and enhance steering feel - 034Motorsport - Audi

Designed to reduce body roll, improve turn-in, reduce understeer and enhance steering feel 2X Entries Into Our F80 M3 Sweepstakes

Brand:
034Motorsport - Corporate Logo
ES#:
4643527
Mfg#:
034-402-1029
Ships in 2 Business Days
$388.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Performance Lightweight Flywheel Kit - Stage 2 Endurance

ES#3449155 - k70614hdofeKT1 - Performance Lightweight Flywheel Kit - Stage 2 Endurance - South Bend Lightweight Single Mass Flywheel with the South Bend Stage 2 clutch kit rated at 440ft/lbs - South Bend Clutch - Audi

South Bend Lightweight Single Mass Flywheel with the South Bend Stage 2 clutch kit rated at 440ft/lbs

Brand:
South Bend Clutch - Corporate Logo
ES#:
3449155
Mfg#:
K70614HDOFEKT1
Ships in 2 Business Days
$3483.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rear HPS 5.0 Performance Brake Pad Set

ES#2748627 - HB544B.628 - Rear HPS 5.0 Performance Brake Pad Set - Next generation high performance street brake pad offering greater stopping power and pedal feel, with very low dust and noise - Hawk - Audi Volkswagen

Next generation high performance street brake pad offering greater stopping power and pedal feel, with very low dust and noise

Brand:
Hawk - Corporate Logo
ES#:
2748627
Mfg#:
HB544B.628
In Stock
10% off MSRP

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

$142.99

This product was last offered at the strikethrough price on
11-05-2026

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

Ignition Service Kit

ES#2561325 - 06C905115M2KT - Ignition Service Kit - Includes four OE red coil packs and four NGK platinum spark plugs - Assembled By ECS - Audi Volkswagen

Includes four OE red coil packs and four NGK platinum spark plugs 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2561325
Mfg#:
06C905115M2KT
In Stock
ON SALE!
$186.99

This product was last offered at the strikethrough price on
11-05-2026

$182.79 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Might-As-Well-Be-Gated Kit W/Short Shift Clamp

ES#4419869 - B8029A2 - Might-As-Well-Be-Gated Kit W/Short Shift Clamp - This combo all but eliminates shifter slop and flex under load. - JXB Performance - Audi

This combo all but eliminates shifter slop and flex under load.

Brand:
JXB Performance - Corporate Logo
ES#:
4419869
Mfg#:
B8029A2
Ships in 4 Business Days
$494.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Performance Parts & Upgrades

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