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Audi B9 S4 Quattro 3.0T

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Audi B9 S4 Quattro 3.0T Engine Parts & Accessories

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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
Ships in 1-2 days
ON SALE!
$321.49 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

VWR Billet Brake Fluid Cap

ES#4040602 - VWR19G707 - VWR Billet Brake Fluid Cap - Replace your brake fluid reservoir cap for improved pressure equalization and stunning appearance. - Racingline - Audi Volkswagen

Replace your brake fluid reservoir cap for improved pressure equalization and stunning appearance. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Racingline - Corporate Logo
ES#:
4040602
Mfg#:
VWR19G707
Ships in 2 Business Days
ON SALE! SAVE 11%
$103.99

This product was last offered at the strikethrough price on
07-01-2026

$92.83 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Turbo Systems B9 S4/S5 3.0T Stage 2 Hybrid Turbocharger (650+ HP)

The Turbo Systems hybrid turbocharger is an original turbocharger that has been reworked to suit larger compressor and turbine wheels, along with a ball bearing cartridge. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Emmanuele Design - Corporate Logo
ES#:
4415834
Mfg#:
TSH55TFSI-STG2
Ships in 1 Business Day
$3499.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Pro Series Head Stud Set

ES#4686116 - P101161610.BR - Pro Series Head Stud Set - Upgraded head studs - Wagner Tuning - Audi

Upgraded head studs affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Wagner Tuning - Corporate Logo
ES#:
4686116
Mfg#:
P101161610.BR
Ships in 1-2 days
ON SALE! SAVE 10%
$499.00

This product was last offered at the strikethrough price on
07-06-2026

$449.10 USD
Free Shipping

Hydraulic Lash Adjuster - Priced Each

ES#4340784 - 06M109423A - Hydraulic Lash Adjuster - Priced Each - Also called the Cam Follower or Valve lifter - Genuine Volkswagen Audi - Audi

Also called the Cam Follower or Valve lifter affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4340784
Mfg#:
06M109423A
Ships in 1 day
2% off MSRP

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

$58.99

This product was last offered at the strikethrough price on
07-06-2026

$57.99 USD
Free Shipping
on orders $49 and up
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%
$998.99

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

$849.14 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust System - Resonated With Exhaust Valves

ES#3240918 - SSXAU641 - Cat-Back Exhaust System - Resonated With Exhaust Valves - 2.50" stainless steel with quad GT-100 Cerakote black tips - Milltek Sport - Audi

2.50" stainless steel with quad GT-100 Cerakote black tips affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models without factory rear sports differential
For vehicles without a sport differential

Brand:
Milltek Sport - Corporate Logo
ES#:
3240918
Mfg#:
SSXAU641
Ships in 3 Business Days
ON SALE! SAVE 10%
$3752.99

This product was last offered at the strikethrough price on
07-01-2026

$3377.24 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust - Resonated

2.50" stainless steel with your choice of tip style affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Milltek Sport - Corporate Logo
ES#:
4164540
Mfg#:
B9RESONATED
Ships in 3 Business Days
ON SALE!
Starting at $3116.70 USD
Customize
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
ON SALE! SAVE 10%
$1201.00

This product was last offered at the strikethrough price on
06-28-2026

$1080.90 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

AirGate Carbon Fiber Intake - With Lid

ES#4043328 - 2660-15032 - AirGate Carbon Fiber Intake - With Lid - Max gains of 16 hp and 3 ft-lbs of torque at the wheels for B9 / 9.5 RS 4 / RS 5 2.9TT (with piggyback tuner) - AWE - Audi

Max gains of 16 hp and 3 ft-lbs of torque at the wheels for B9 / 9.5 RS 4 / RS 5 2.9TT (with piggyback tuner) affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
AWE - Corporate Logo
ES#:
4043328
Mfg#:
2660-15032
In Stock
$1075.00 USD
This product is lifetime replacement eligible Lifetime Replacement

High Flow Inlet Pipe

ES#4420002 - CTS-HW-380 - High Flow Inlet Pipe - The biggest issue with the restrictive factory inlet is apparent when you start to increase the power. CTS engineers designed the turbo inlet to be as large as possible; yet still fit perfectly. - CTS - Audi

The biggest issue with the restrictive factory inlet is apparent when you start to increase the power. CTS engineers designed the turbo inlet to be as large as possible; yet still fit perfectly. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
CTS - Corporate Logo
ES#:
4420002
Mfg#:
CTS-HW-380
Back Ordered
Auto Notify
$99.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Performance Intake System

ES#4835388 - B930TINT - Performance Intake System - maximize your airflow with more power, torque, and incredible induction sounds! - ARM Motorsports - Audi

maximize your airflow with more power, torque, and incredible induction sounds! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
ARM Motorsports - Corporate Logo
ES#:
4835388
Mfg#:
B930TINT
Ships in 1-2 days
$227.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

B9 S4/S5 Cat-Back Exhaust System - Non-Resonated (Louder)

ES#3466846 - SSXAU701 - B9 S4/S5 Cat-Back Exhaust System - Non-Resonated (Louder) - 2.50" stainless steel with quad GT-100 cerakote black tips - Milltek Sport - Audi

2.50" stainless steel with quad GT-100 cerakote black tips affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models with factory rear sports differential

Brand:
Milltek Sport - Corporate Logo
ES#:
3466846
Mfg#:
SSXAU701
Ships in 3 Business Days
ON SALE! SAVE 10%
$3507.99

This product was last offered at the strikethrough price on
07-01-2026

$3156.71 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Atmospheric Dump Valve - Black

ES#3612126 - FMDV13A - Atmospheric Dump Valve - Black - Prevent boost leaks with full billet construction - Forge - Audi

Prevent boost leaks with full billet construction affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Forge - Corporate Logo
ES#:
3612126
Mfg#:
FMDV13A
In Stock
ON SALE! SAVE 10%
$349.99

This product was last offered at the strikethrough price on
07-01-2026

$314.86 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Audi B9 3.0T S4 S5 Catted Downpipe

ES#4905571 - B930TDPC - Audi B9 3.0T S4 S5 Catted Downpipe - Increased Power and Torque, Massive 6.5" Design, Faster Turbo Spool, and Improved Exhaust Note - ARM Motorsports - Audi

Increased Power and Torque, Massive 6.5" Design, Faster Turbo Spool, and Improved Exhaust Note affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
ARM Motorsports - Corporate Logo
ES#:
4905571
Mfg#:
B930TDPC
Ships in 3 Business Days
$779.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Diverter Valve Kit

ES#4818158 - 06m145710fKT - Diverter Valve Kit - Replace your Diverter Valve with new bolts - Genuine Volkswagen Audi - Audi

Replace your Diverter Valve with new bolts affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4818158
Mfg#:
06M145710FKT
Ships in 1 day
$172.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Parts & Accessories

Whether you're maintaining or repairing your stock engine or looking for added horsepower, we have one of the most comprehensive inventories of engine parts and accessories for German cars. From hard engine parts like connecting rods, pistons, cylinder heads, short blocks, and engine timing parts to performance engine software upgrades; we have you covered.

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