Top Mods for your Audi B9 S4 3.0T
ECS loves helping you make your car all it can be; that's why we've put all the top-of-the-line performance parts for your AUDI B9 S4 together in one place. This list, compiled by our own AUDI gurus, is everything you need to outfit your car with all those goodies you've wanted for your build. Let's make race season even more fun with all the best performance parts for your Audi B9 S4!
Hand Selected By Our Team Of Enthusiast
For Your
Audi B9 S4 3.0T
B9 A4/A5/S4/S5 Quattro Adjustable Damping Coilovers
Features 32 way adjustable damping, variable length and zinc-coated shock bodies
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Models with Dynamic Chassis Control (DCC) will require DCC Cancelers
Models with Dynamic Chassis Control (DCC) will require DCC Cancelers
Brand:
ES#:
4474122
Mfg#:
000745LA01
Dynamic+ Lowering Springs
Engineered to improve handling and deliver superb ride quality!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand:
ES#:
3491530
Mfg#:
034-404-1005
Sport Springs - Set
Finally, A performance lowering spring for your B9 chassis Audi - Offering unrivaled comfort and performance
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!
We Price Match - Give Us A Call or Chat!
Brand:
ES#:
3187941
Mfg#:
50357
Dynamic+ Adjustable Rear Sway Bar
Designed to combat understeer while reducing body roll under hard cornering!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand:
ES#:
3241098
Mfg#:
034-402-1010
Audi B9 S4/S5 3.0T 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 Cold Air Intake
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3477816
Mfg#:
023795ECS06
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
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3545247
Mfg#:
023796ECS04
B9/B9.5 S4 & S5 3.0T IE Carbon Fiber Intake System
One-Piece carbon fiber construction that adds up to +16HP/TQ
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4346278
Mfg#:
IEINCK3
P34 Cold Air Intake
034Motorsport's P34 Cold Air Intake System delivers improved power, sound, and acceleration
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand:
ES#:
4381931
Mfg#:
034-108-1028
Audi B9 S4/S5/SQ5 3.0T Big Bore Cast Aluminum Turbo Inlet Pipe
Remove the plastic and reduce restriction at your turbo
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3647752
Mfg#:
027714ECS01
APR Front Mount Intercooler System - B9 S4/S5 3.0T
Massive front mounted upgrade that dramatically reduces intake air temperature (IAT), minimizes heat soak, and provides increased performance!
Call In Or Chat For Best Price! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3613172
Mfg#:
IC100023
Choose how many gift cards you would like below. You can set the denomination in your cart during checkout.
Availability:
Back Ordered
Back Ordered
Audi B9 S4 Luft-Technik Intercooler and Charge Pipe Kit
Full kit to upgrade your charge pipes and front mount intercooler
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3639384
Mfg#:
023880ECS01AKT1
Choose how many gift cards you would like below. You can set the denomination in your cart during checkout.
Availability:
Ships on Sep 23, 2026
Auto Notify
Ships on Sep 23, 2026
FDS Front-Mount Intercooler Kit - Silver
Increase horsepower and eliminate heatsoak - Drop-in intercooler requires no cutting, trimming, or mods!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3470702
Mfg#:
IETPCK1
B9 S4/S5 Post Throttle Valve Charge Pipe Kit - Wrinkle Red
Ditch the plastic and increase air flow!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3579787
Mfg#:
024313ECS01-02KT
Choose how many gift cards you would like below. You can set the denomination in your cart during checkout.
Availability:
Ships on Aug 3, 2026
Auto Notify
Ships on Aug 3, 2026
VW MK8 2.0T / Audi 3.0T Diverter Valve Spacer - Clear Anodized
Let your turbo blow off some air for an exhilarating driving experience!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4033242
Mfg#:
028495ECS01
Audi B9 S4 Intercooler Charge Pipe Kit
Increase intake air flow with our high flow charge pipes for your ECS Tuning or OEM intercooler!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3638868
Mfg#:
023880ECS01AKT
Stage 1 IE Performance ECU Tune - Includes Stage 1 TCU Tune & POWERlink Cable
Average gain of 138 horsepower and 178 lb-ft of torque on 91 Octane with stock hardware
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!
Perform tune in minutes from the comfort of your own driveway! Only available for purchase in the United States and Canada.
Perform tune in minutes from the comfort of your own driveway! Only available for purchase in the United States and Canada.
Brand:
ES#:
4418875
Mfg#:
IESOVZ11TCU
Stage 1 IE Performance ECU Tune With POWERlink Cable
Average gain of 138 horsepower and 178 lb-ft of torque on 91 Octane with stock hardware
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!
Perform tune in minutes from the comfort of your own driveway! Only available for purchase in the United States and Canada.
Perform tune in minutes from the comfort of your own driveway! Only available for purchase in the United States and Canada.
Brand:
ES#:
4418872
Mfg#:
IESOVZ11
Unitronic Performance Software - Stage 1+ - With UniCONNECT+ Cable
Gain up to 100 horsepower and 112 lb-ft of torque on 93 Octane
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
This tune can be performed at home with the included UniCONNECT+ cable. Only available for purchase in th
This tune can be performed at home with the included UniCONNECT+ cable. Only available for purchase in th
Brand:
ES#:
4375901
Mfg#:
30T-EA839-1+-UC
Silicone Turbo Inlet Hose - Audi B9 S4/S5
Flexible silicone smooths the intake tract & hinders collapsing. The ultimate in durability!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3420204
Mfg#:
024360ECS01
APR Upgraded Ignition Coils - Red - Set Of Six
Designed to be a direct plug-and-play upgrade to factory coils, providing greater energy output, ensuring a stronger and more consistent spark!
Call In Or Chat For Best Price! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!
CARB certified for sale in all 50 states
CARB certified for sale in all 50 states
Brand:
ES#:
4030593
Mfg#:
MS100192KT2
EO#:
D-783-5
Audi B9 S4/S5 3.0T Performance Baffled Oil Catch Can System
Keep your intake tract clean and carbon free
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4044357
Mfg#:
023952ECS01KT
Audi B9 S4/S5 Sportback 3.0T Valved Exhaust System
ECS evolutionary design and manufacturing, blending with raw emotion, desire and passion, creating a truly unique driving experience
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4369839
Mfg#:
026018ECS
Choose how many gift cards you would like below. You can set the denomination in your cart during checkout.
Availability:
In Stock
In Stock
B9 S4/S5 Cat-Back Exhaust System - Non-Resonated (Louder)
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
Fits models with factory rear sports differential
Brand:
ES#:
3466846
Mfg#:
SSXAU701
IE Performance Cast Downpipe
Features a TIG-welded 304 stainless and investment cast body and offers gains up to 45HP & 41TQ
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4473979
Mfg#:
IEEXCK3
IE Midpipe Exhaust Upgrade
Aggressive sound, quality finish, reliable operation, straightforward install, and affordable fun.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4489116
Mfg#:
IEEXCK4
B9 S4 3.0T Center X-Pipe
Sound great and save weight! Eliminate the center resonator on your OE system for a more aggressive exhaust note
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3521607
Mfg#:
024365ECS01KT
Billet Aluminum Front Strut Brace - Audi B9 A4/A5/S4/S5/RS5
Provides additional support to the strut towers for flex reduction to enhance your driving experience
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3188267
Mfg#:
019218ECS01
Billet Aluminum Transmission Mount Insert
This billet aluminum insert is designed to fill the large void in the factory transmission mount
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand:
ES#:
3176060
Mfg#:
034-509-4053
Transmission Mount Bushing Insert Kit
Decrease transmission mount slop for better drivetrain response!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3170153
Mfg#:
019209ECS01