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Audi B9 S4 Quattro 3.0T

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Audi B9 S4 Quattro 3.0T Performance Parts & Upgrades

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COBB Tuning Accessport Tuner V3

ES#4668573 - AP3-VLK-004 - COBB Tuning Accessport Tuner V3 - Gain up to 80 horsepower and 151 lb-ft of torque on 93 Octane - CobbTuning - Audi

Gain up to 80 horsepower and 151 lb-ft of torque on 93 Octane

Brand:
CobbTuning - Corporate Logo
ES#:
4668573
Mfg#:
AP3-VLK-004
In Stock
ON SALE! SAVE 10%
$770.00

This product was last offered at the strikethrough price on
08-17-2026

$693.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

IE Adjustable Front Sway End Links

ES#5375255 - IESSCK4 - IE Adjustable Front Sway End Links - Easy adjustments perfect any ride height and provide tight, responsive handling - Integrated Engineering - Audi

Easy adjustments perfect any ride height and provide tight, responsive handling

Brand:
Integrated Engineering - Corporate Logo
ES#:
5375255
Mfg#:
IESSCK4
Ships in 2 Business Days
$229.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 A4/S4 A5/S5 RS5 Front And Rear Adjustable Sway Bar Kit

ES#4065005 - 022847ecs01KT1 - Audi B9 A4/S4 A5/S5 RS5 Front And Rear Adjustable Sway Bar Kit - Reduce body roll and enhance handling! - ECS - Audi

Reduce body roll and enhance handling! 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
4065005
Mfg#:
022847ECS01KT1
Ships on Jan 4, 2027
Auto Notify
ON SALE!
$722.99

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

$686.84 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

IE Front Sway Bar Upgrade

ES#5375237 - IESSCK3 - IE Front Sway Bar Upgrade - Direct bolt-in replacement with adjustable stiffness for reduced body roll and increased grip! - Integrated Engineering - Audi

Direct bolt-in replacement with adjustable stiffness for reduced body roll and increased grip! This front sway bar must be paired with the matching iE Rear Sway Bar (IESSCK1)

Brand:
Integrated Engineering - Corporate Logo
ES#:
5375237
Mfg#:
IESSCK3
Ships in 1 Business Day
$339.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Euro Ceramic Brake Pad Set- Rear

ES#4620312 - EUR1898A - Euro Ceramic Brake Pad Set- Rear - For those looking for a low dust replacement brake pad - Akebono - Audi

For those looking for a low dust replacement brake pad Fits Up to 2020 Model Year Only

Brand:
Akebono - Corporate Logo
ES#:
4620312
Mfg#:
EUR1898A
In Stock
ON SALE!
$140.99

This product was last offered at the strikethrough price on
08-23-2026

$133.06 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front Brake Pad Set

ES#4031335 - 8W0698151N - Front Brake Pad Set - Composite pads that are a great solution for your daily driver. - Textar - Audi

Composite pads that are a great solution for your daily driver.

Brand:
Textar - Corporate Logo
ES#:
4031335
Mfg#:
8W0698151N
Ships in 1-2 days
$340.99

This product was last offered at the strikethrough price on
05-07-2026

$331.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

EMD Wheel Spacer & Bolt Kit - 10mm With Conical Seat Bolts

Includes everything you need to install spacers on two wheels Fits most aftermarket wheels that use conical seat wheel bolts

Brand:
Emmanuele Design - Corporate Logo
ES#:
4430382
Mfg#:
EMDSPACER10665CB
In Stock at Vendor
$110.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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

ES#2568317 - 6-ECS-024 - Wheel Spacer & Bolt Kit - 20mm With Conical Seat Bolts - Complete kit for two wheels, comes with everything you need to install spacers on your aftermarket wheels - ECS - Audi

Complete kit for two wheels, comes with everything you need to install spacers on your aftermarket wheels 10X Entries Into Our F80 M3 Sweepstakes
Fits most aftermarket wheels that use conical seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2568317
Mfg#:
6-ECS-024
Ships in 9 Business Days
ON SALE! SAVE 10%
$179.99

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

$161.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Special Active Rear Shock - Priced Each

ES#4698697 - 82451407 - Special Active Rear Shock - Priced Each - Superior handling without compromising ride quality - Koni - Audi

Superior handling without compromising ride quality For vehicles without electronic suspension

Brand:
Koni - Corporate Logo
ES#:
4698697
Mfg#:
82451407
In Stock
38% off MSRP

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

$258.99

This product was last offered at the strikethrough price on
08-23-2026

$159.99 USD
Free Shipping
on orders $49 and up

Neuspeed Power Module EVO - B9 S4 Quattro

ES#4906476 - 64.02.09 - Neuspeed Power Module EVO - B9 S4 Quattro - Proprietary tune box designed specifically for the EA839 3.0L TFSI with gains of +40 Horsepower / 70 ft-lb of Torque! - Neuspeed - Audi

Proprietary tune box designed specifically for the EA839 3.0L TFSI with gains of +40 Horsepower / 70 ft-lb of Torque!

Brand:
Neuspeed - Corporate Logo
ES#:
4906476
Mfg#:
64.02.09
Ships in 2 Business Days
5% off MSRP

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

$649.00

This product was last offered at the strikethrough price on
08-12-2026

$616.99 USD
Free Shipping
Scratch and Dent Item

Carbon Fiber Front Lip Spoiler - Audi B9 A4/S4 - (NO LONGER AVAILABLE) *Scratch And Dent*

ES#5396163 - 019196ECS01A - Carbon Fiber Front Lip Spoiler - Audi B9 A4/S4 - (NO LONGER AVAILABLE) *Scratch And Dent* - Hand-laid carbon fiber to upgrade your exterior styling - Scratch & Dent - Audi

Hand-laid carbon fiber to upgrade your exterior styling ALL SALES FINAL. ITEMS MAY BE DAMAGED OR MISSING COMPONENTS. PLEASE SEE IMAGES BEFORE PURCHASING. Want To Haggle? Give Us A Call Or Chat To Make An Offer On This Product!

Brand:
Scratch & Dent - Corporate Logo
ES#:
5396163
Mfg#:
019196ECS01A
In Stock
ON SALE! SAVE 30%
$875.99

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

$612.00 USD

Wheel Spacer & Bolt Kit - 8mm With Conical Seat Bolts

ES#2568314 - 6-ECS-018 - Wheel Spacer & Bolt Kit - 8mm With Conical Seat Bolts - Complete kit for two wheels, comes with everything you need to install spacers on your aftermarket wheels - ECS - Audi

Complete kit for two wheels, comes with everything you need to install spacers on your aftermarket wheels 10X Entries Into Our F80 M3 Sweepstakes
Fits most aftermarket wheels that use conical seat wheel bolts

Brand:
ECS - Corporate Logo
ES#:
2568314
Mfg#:
6-ECS-018
In Stock
ON SALE! SAVE 10%
$134.99

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

$121.49 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Ball Seat Locking Wheel Bolt Kit

ES#2795758 - 003901ECS35BB - Ball Seat Locking Wheel Bolt Kit - Black zinc coated wheel lock bolts made specifically for OE wheels. M14x1.5x35mm - ECS - Audi Volkswagen

Black zinc coated wheel lock bolts made specifically for OE wheels. M14x1.5x35mm 10X Entries Into Our F80 M3 Sweepstakes
For use with 6-8mm spacers

Brand:
ECS - Corporate Logo
ES#:
2795758
Mfg#:
003901ECS35BB
Ships on Sep 10, 2026
ON SALE! SAVE 25%
$88.99

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

$66.74 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

APR TCU Upgrade - 8-Speed Tiptronic (AL552 8HP55 ZF8)

ES#4715771 - TCU-AL552 - APR TCU Upgrade - 8-Speed Tiptronic (AL552 8HP55 ZF8) - Optimize the driving experience with performance tuning software for your vehicle's Transmission Control Unit (TCU). - APR - Audi

Optimize the driving experience with performance tuning software for your vehicle's Transmission Control Unit (TCU). Call In Or Chat For Best Price!
This upgrade requires the vehicle to be dropped off at ECS Tuning's facility in Ohio and picked up the ne

Brand:
APR - Corporate Logo
ES#:
4715771
Mfg#:
TCU-AL552
In Stock
$599.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Burger Motorsports JB4 Tuner

ES#3639972 - JB4-B9-S4S5 - Burger Motorsports JB4 Tuner - This easy to install plug and play tuner attaches to sensors in the engine bay and works with your factory ECU tuning to remap boost, timing, and fueling for optimal performance and reduced turbo lag. - Burger Motorsports - Audi

This easy to install plug and play tuner attaches to sensors in the engine bay and works with your factory ECU tuning to remap boost, timing, and fueling for optimal performance and reduced turbo lag. Not for sale or use in the state of California.

Brand:
Burger Motorsports - Corporate Logo
ES#:
3639972
Mfg#:
JB4-B9-S4S5
Ships on Sep 9, 2026
$599.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Performance Parts & Upgrades

All the performance upgrade options from the best brands in the business to help build your dreams. Our performance parts catalog is the largest anywhere and constantly growing to keep your build on track.

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