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Audi S4 Performance Parts & Upgrades

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Audi B8.5 S4 / A4 S-Line Forged Carbon Fiber Front Lip

ES#4490853 - 013875ECS01-02 - Audi B8.5 S4 / A4 S-Line Forged Carbon Fiber Front Lip - Hand-laid chopped carbon fiber to upgrade your exterior styling - ECS - Audi

Hand-laid chopped carbon fiber to upgrade your exterior styling affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

For vehicles from the 2013 model year (Facelift)

Brand:
ECS - Corporate Logo
ES#:
4490853
Mfg#:
013875ECS01-02
In Stock
ON SALE! SAVE 36%
$940.99

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

$599.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Motorsport Street Density Motor Mount Kit

ES#2864596 - 034-509-0005 - Motorsport Street Density Motor Mount Kit - The ultimate in performance and durability - 034Motorsport - Audi Volkswagen

The ultimate in performance and durability affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
2864596
Mfg#:
034-509-0005
In Stock
$359.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

B6 S4 Muffler Delete Kit - With 4.0" Black Chrome Tips

ES#4660138 - 042002la01KT - B6 S4 Muffler Delete Kit - With 4.0" Black Chrome Tips - Add an aggressive exhaust note to your B6 S4 so you can hear that V8 roar! - ECS - Audi

Add an aggressive exhaust note to your B6 S4 so you can hear that V8 roar! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4660138
Mfg#:
042002LA01KT
In Stock
ON SALE! SAVE 10%
$451.99

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

$406.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Street Density Line Transmission Mount - Priced Each

ES#2951985 - 034-509-4046sd - Street Density Line Transmission Mount - Priced Each - Increase performance and durability without sacrificing comfort - 034Motorsport - Audi

Increase performance and durability without sacrificing comfort affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits the left and right side

Brand:
034Motorsport - Corporate Logo
ES#:
2951985
Mfg#:
034-509-4046SD
In Stock
$96.00

This product was last offered at the strikethrough price on
05-01-2026

$75.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

B8/C7 Center Differential Delete - NO WELDING NEEDED

ES#4375353 - 012535LA01 - B8/C7 Center Differential Delete - NO WELDING NEEDED - Easily allows the removal of center differential when converting your B8 S4 to RWD (rear wheel drive) from Quattro - ECS - Audi

Easily allows the removal of center differential when converting your B8 S4 to RWD (rear wheel drive) from Quattro affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
100% reversible RWD kit when paired with our Axle Delete Plugs (ES4373491) Please make sure via VIN that

Brand:
ECS - Corporate Logo
ES#:
4375353
Mfg#:
012535LA01
Ships on Jul 6, 2026
Auto Notify
ON SALE! SAVE 20%
$443.99

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

$355.19 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front & Rear Exact-Fit Stainless Steel Brake Lines - Kit

ES#1402 - B6A4SSBLK - Front & Rear Exact-Fit Stainless Steel Brake Lines - Kit - Complete set of DOT-compliant lines for an improved pedal feel - ECS - Audi

Complete 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#:
1402
Mfg#:
B6A4SSBLK
In Stock
ON SALE!
$182.99

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

$177.50 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Dynamic+ Braking Package - Stage 1

ES#4879774 - 034-301-0004-DSO - Dynamic+ Braking Package - Stage 1 - The new standard for braking performance upgrades on your B9/B9.5 Audi S4, S5, or SQ5. - 034Motorsport - Audi

The new standard for braking performance upgrades on your B9/B9.5 Audi S4, S5, or SQ5. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
4879774
Mfg#:
034-301-0004-DSO
Back Ordered
$2127.00 USD
Free Shipping

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

ES#3618485 - 2455668SW - DR Series Wheel Spacers (Black) - 12mm (1 Pair) - Get a new set of spacers and widen the stance of your vehicle - H&R - Audi MINI Porsche

Get a new set of spacers and widen the stance of your vehicle 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!
Maximum factory hub height of up to 13.5mm. Inside wheel bevel = 4.0 x 45 degrees

Brand:
H&R - Corporate Logo
ES#:
3618485
Mfg#:
2455668SW
In Stock
$109.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Ignition Service Kit

ES#3691949 - 06h905110lkt5KT - Ignition Service Kit - Includes six red top coil packs, OEM spark plugs, and dielectric spark plug boot protector to service your ignition! - Assembled By ECS - Audi

Includes six red top coil packs, OEM spark plugs, and dielectric spark plug boot protector to service your ignition! 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#:
3691949
Mfg#:
06H905110LKT5KT
In Stock
ON SALE!
$321.49 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

034Motorsport 3.0T Supercharger Pulley Upgrade

ES#3432403 - 034-145-Z034 - 034Motorsport 3.0T Supercharger Pulley Upgrade - Increased horsepower and torque throughout the powerband when paired with Stage 2 Performance Software. - 034Motorsport - Audi

Increased horsepower and torque throughout the powerband when paired with Stage 2 Performance Software. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
*3.0 TFSI Performance Software is sold separately and required in order for this pulley to yield a performance benefit.*

Brand:
034Motorsport - Corporate Logo
ES#:
3432403
Mfg#:
034-145-Z034
In Stock
$199.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 S4/S5 3.0T Kohlefaser Luft-Technik Intake System

ES#3545247 - 023796ECS04 - Audi B9 S4/S5 3.0T Kohlefaser Luft-Technik Intake System - Enhance your engine's performance with gains up to 16 Wheel Horsepower and 15 foot pounds of torque with our ECS Carbon Fiber Cold Air Intake - ECS - Audi

Enhance your engine's performance with gains up to 16 Wheel Horsepower and 15 foot pounds of torque with our ECS Carbon Fiber Cold Air Intake affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3545247
Mfg#:
023796ECS04
In Stock
ON SALE! SAVE 15%
$978.86

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

$832.03 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Non-Resonated (Louder)

ES#3240938 - SSXAU657 - Cat-Back Exhaust System - Non-Resonated (Louder) - 2.50" stainless steel with quad GT-90 titanium tips - Milltek Sport - Audi

2.50" stainless steel with quad GT-90 titanium tips affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models without factory rear sports differential

Brand:
Milltek Sport - Corporate Logo
ES#:
3240938
Mfg#:
SSXAU657
Ships in 4 Business Days
$4158.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Billet Aluminum Rear Differential Mount Insert Kit

ES#3509529 - 034-505-2020 - Billet Aluminum Rear Differential Mount Insert Kit - Limits movement of factory rear diff mounts, increasing drivetrain rigidity and response! - 034Motorsport - Audi

Limits movement of factory rear diff mounts, increasing drivetrain rigidity and response! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3509529
Mfg#:
034-505-2020
In Stock
$154.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Audi B8 / C7 Brake Cooling Duct Set

ES#4353029 - 006945la04 - Audi B8 / C7 Brake Cooling Duct Set - Increase air flow to your brakes! - ECS - Audi

Increase air flow to your brakes! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4353029
Mfg#:
006945LA04
In Stock
$89.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rear Cross Drilled UV Coated Brake Rotors - Pair (330x22)

ES#4491560 - 8k0615601cxKT - Rear Cross Drilled UV Coated Brake Rotors - Pair (330x22) - Features Brembo's special UV paint treatment that guarantees superior corrosion resistance. - Brembo - Audi

Features Brembo's special UV paint treatment that guarantees superior corrosion resistance. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Brembo - Corporate Logo
ES#:
4491560
Mfg#:
8K0615601CXKT
Ships in 4 Business Days
$422.99

This product was last offered at the strikethrough price on
01-21-2026

$289.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Performance Parts & Upgrades

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