Shirk's - Audi B9 S4 Build List (Former ECS Project)
Nothing says classy and fun like the S4, especially the B9 S4 featuring the new turbocharged 3.0 V6 and lightning-quick transmission. Our B9 S4 sports some elegant and tasteful additions developed right here in-house for this platform to help demonstrate just how incredible you can make this car without much effort. From visual improvements to suspension, engine performance, brakes, and more, our B9 S4 build list is your road map to upgrading your S4 with some of the best parts in the scene.
Shirk's IG - joshirk18
Fits:
Audi B9 S4
APR DTR8868 Direct Replacement Turbo System (3.0T EA839)
Direct turbocharger replacement providing up to 620HP (571 AWHP) and 622FT-LBS (572 AWTQ)
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!
Call In, Chat, Or Email, For Best Price! Limited Time Only!
Call In, Chat, Or Email, For Best Price! Limited Time Only!
Brand:
ES#:
4715935
Mfg#:
T4100001
No longer available
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 at Vendor
In Stock at Vendor
19" A01 Flow Formed Wheels - Set Of Four
19"x8.5" ET45 5x112 - Hyper Silver
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#:
3537669
Mfg#:
WHL00001KT
19" Tekniform Style 006 - Set Of Four
19"x8.5" ET40 66.6CB 5x112 - Matte Gunmetal
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand:
ES#:
4338088
Mfg#:
006-4KT
Street Performance Coilover System
Finally, A performance coilover suspension system for your B9 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#:
3187951
Mfg#:
50356
Choose how many gift cards you would like below. You can set the denomination in your cart during checkout.
Availability:
In Stock
In Stock
Adjustable Front Sway Bar End Link Set - Audi B8/Porsche Macan
Attaches sway bar to control arm, adjustable to increase clearance between sway bar and axles. Offers just under 2" of adjustability!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3176605
Mfg#:
003112ECS01
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
ECS Tuning Ultimate Audi B9 Street Shield Kit
Get the ultimate under body protection for your B9!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3612458
Mfg#:
019207ECS01KT5
Front 2-Piece Scalloped Brake Rotors - Pair (350x34)
Direct bolt-on upgrade to Tru-Float scalloped style rotors. Over 15% less weight!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3559513
Mfg#:
023940ECS01KT
Rear 2-Piece Scalloped Brake Rotors - Pair (330x22)
Direct bolt-on upgrade to Tru-Float scalloped style rotors. 20% less weight!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3520785
Mfg#:
023950ECS01KT
Front & Rear Exact-Fit Stainless Steel Brake Lines - Kit
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:
ES#:
3491660
Mfg#:
024921ECS01KT
Complete Drivetrain Mount Insert Kit
Decrease slop and increase drivetrain rigidity and response!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3194637
Mfg#:
019208ECS01KT1
APR 3.0T Stage 1 ECU Upgrade
Expect massive gains with 431-480 HP with 467-549 FT-LBS of torque on tap, depending on octane, from this simple software upgrade!
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!
This upgrade must be performed at ECS Tuning's facility in Ohio.
This upgrade must be performed at ECS Tuning's facility in Ohio.
Brand:
ES#:
4057386
Mfg#:
DPP-30T-MG1
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
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
ECS Performance 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!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4686053
Mfg#:
002540LCA03KT
Audi B9 Carbon Fiber Engine Cover Overlay Kit
Add a touch of carbon fiber to your stock engine cover!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3969803
Mfg#:
023897ECS02
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/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
Luft-Technik Intake Air Scoop
Extends farther down behind the grille to direct more air to the intake system
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3183334
Mfg#:
019848ECS01
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
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
Carbon Fiber ECU Cover - Audi B9 S4/S5/RS5
Compliment your engine bay and hide away the exposed ECU
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3247906
Mfg#:
024249ECS01
Billet Washer Fluid Reservoir Cap - Black Anodized
Lose the plastic!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3194626
Mfg#:
022732ECS01-01
Billet Engine Oil Cap - Black Anodized - (NO LONGER AVAILABLE)
Lose the plastic!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4147240
Mfg#:
027493ECS01-01KT
No longer available
Billet Coolant Reservoir Cap - Black Anodized
Lose the plastic!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3509688
Mfg#:
022731ECS01-01
Billet Hood Latch Release Handle
Billet aluminum hood release handle replacement for the plastic OEM hood pull
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3195650
Mfg#:
019386ECS01
Choose how many gift cards you would like below. You can set the denomination in your cart during checkout.
Availability:
In Stock
In Stock
ECS Tuning Billet Engine Oil Dipstick - Black Anodized
A beautiful addition and durable upgrade for your engine
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3545565
Mfg#:
023954ECS01-02
Carbon Fiber Front Lip Overlay - Audi B9 A4/S4
Add a subtle touch of carbon fiber to your B9 A4/S4 front bumper
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
3220704
Mfg#:
022539ECS01