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Audi B9 S4 Quattro 3.0T

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Audi B9 S4 Quattro 3.0T Performance Engine Parts

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RS+ Injector Upgrade Kit - EA839 3.0T/2.9T

ES#5374600 - 034-106-3044 - RS+ Injector Upgrade Kit - EA839 3.0T/2.9T - Safely provides a 67% increase in flow over EA839 3.0T and 31% increase over EA839 2.9T/EA825 4.0T RS Injectors! - 034Motorsport - Audi

Safely provides a 67% increase in flow over EA839 3.0T and 31% increase over EA839 2.9T/EA825 4.0T RS Injectors! Must Run a 034Motorsport Stage 3 File Specifically for These Injectors

Brand:
034Motorsport - Corporate Logo
ES#:
5374600
Mfg#:
034-106-3044
Ships in 2 Business Days
$2400.00 USD
Free Shipping

Turbosmart WG45 Gen V Hyper-Gate 45

ES#4643523 - ts-0553-1002 - Turbosmart WG45 Gen V Hyper-Gate 45 - More features, options and performance than any other gate. - TurboSmart - Audi BMW Volkswagen

More features, options and performance than any other gate.

Brand:
TurboSmart - Corporate Logo
ES#:
4643523
Mfg#:
TS-0553-1002
Ships on Aug 5, 2026
10% off MSRP

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

$518.99

This product was last offered at the strikethrough price on
07-20-2026

$467.99 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 Fits models without factory rear sports differential

Brand:
Milltek Sport - Corporate Logo
ES#:
3240938
Mfg#:
SSXAU657
Ships in 3 Business Days
$4158.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cat-Back Exhaust - Non Resonated

2.50" stainless steel with your choice of tip style

Brand:
Milltek Sport - Corporate Logo
ES#:
4164626
Mfg#:
B9NONRESONATED
Ships in 3 Business Days
Starting at $3507.99 USD
Customize
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

TTE710 Turbo Upgrade - B9 S4/S5/SQ5 3.0T

ES#4493300 - TTE10388 - TTE710 Turbo Upgrade - B9 S4/S5/SQ5 3.0T - Pair this with the Integrated Engineering or 034 Motorsports Stage 3 tune for 600+hp! - The Turbo Engineers - Audi

Pair this with the Integrated Engineering or 034 Motorsports Stage 3 tune for 600+hp! Custom tuning software required for installation.

Brand:
The Turbo Engineers - Corporate Logo
ES#:
4493300
Mfg#:
TTE10388
Ships in 10 Business Days
Auto Notify
$3906.99 USD
Free Shipping
on orders $49 and up
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 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
$3752.99 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

Brand:
Milltek Sport - Corporate Logo
ES#:
4164540
Mfg#:
B9RESONATED
Ships in 3 Business Days
Starting at $3463.00 USD
Customize
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 Fits models with factory rear sports differential

Brand:
Milltek Sport - Corporate Logo
ES#:
3466846
Mfg#:
SSXAU701
Ships in 3 Business Days
$3507.99 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

Brand:
Forge - Corporate Logo
ES#:
3612126
Mfg#:
FMDV13A
Ships in 3 Business Days
$349.99 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.

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

Bosch 044 High Flow Fuel Pump - 270 LPH

ES#514125 - 0580254044 - Bosch 044 High Flow Fuel Pump - 270 LPH - Great for when more fuel is needed in a custom fueling application - Bosch - Audi Volkswagen

Great for when more fuel is needed in a custom fueling application 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
514125
Mfg#:
0580254044
In Stock
$230.99 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 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

More About Performance Engine Parts

Our name says it all. That's why ECS Tuning is dedicated to providing our customers with the broadest possible assortment of engine tuning options at a range of prices and options to fit any budget. Start small and grow your car into something special with performance engine upgrades from a company that has tuning in its name and its blood.

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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