ECS Project - Audi B9 A4 Build List
The B9 A4 has yet to achieve the same prolific acceptance it's predecessor did, but it's still got plenty of time to grow on enthusiasts as the market continues to develop. Speaking of, our ECS project B9 A4 features tons of our in-house developed performance and visual upgrades that help draw out the hidden power from the platform. If you want to transform your B9 A4, everything we've done to ours can be found right here so you can make the same choice upgrades and enjoy this luxury sedan to its fullest potential.
A true build list inspiration
Fits:
Audi B9 A4
Stage 1 Software Upgrade
Higher peak figures of 306-314 HP with 367-388 FT-LBS of torque depending on fuel grade!
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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#:
3146864
Mfg#:
DPP-2.0T-MLB-SP
Audi B9 A4 2.0T Valved Exhaust System - Cat Back
Max gains of +16 WHP and +17 WTQ on our B9 A4 equipped with a Luft-Technik intake, ECS Intercooler/charge pipes, and a stage 1 tune!
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For vehicles up through the 2018 model year only (Pre-Facelift)
For vehicles up through the 2018 model year only (Pre-Facelift)
Brand:
ES#:
4488077
Mfg#:
021275ECS01
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Availability:
Ships on Nov 13, 2026
Ships on Nov 13, 2026
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
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Brand:
ES#:
3188267
Mfg#:
019218ECS01
(2017+) B9 A4/A5 2.0T Kohlefaser Luft-Technik Intake System
Engineered for dyno proven performance and show quality looks!
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Does not fit models equipped with a MAF sensor (DBPA or DPAA engine codes) - Please verify prior to order
Does not fit models equipped with a MAF sensor (DBPA or DPAA engine codes) - Please verify prior to order
Brand:
ES#:
3143733
Mfg#:
019183ECS01
Luft-Technik B9 A4 Intercooler And Charge Pipe Kit
Full kit to upgrade your charge pipes and FMIC
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Brand:
ES#:
3557444
Mfg#:
019219ECS01AKT2
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Availability:
Ships on Sep 23, 2026
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Ships on Sep 23, 2026
Luft-Technik Intake Air Scoop
Extends farther down behind the grille to direct more air to the intake system
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Brand:
ES#:
3183334
Mfg#:
019848ECS01
Kohlefaser Luft-Technik Intake System Reflect-A-Gold Kit
Pre-cut DEI Reflect-a-Gold to apply directly to your new Kohlefaser Luft-Technik Intake System
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Brand:
ES#:
3221001
Mfg#:
020870ECS01KT
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Availability:
Ships on Jul 31, 2026
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Ships on Jul 31, 2026
Silicone Turbo Inlet Hose
Flexible silicone smooths the intake tract & provides unimpeded airflow. The ultimate in looks and durability!
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Brand:
ES#:
4017429
Mfg#:
019216ECS02
Turbo Muffler Delete Pipe
Replace the factory turbo muffler with a straight through billet aluminum delete pipe kit
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Brand:
ES#:
3999162
Mfg#:
019330ECS01KT
Manifold Port Boost Tap Kit
Installs in the unused port of the intake manifold. Features three vacuum ports for multiple boost / vacuum references.
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Brand:
ES#:
3136138
Mfg#:
013576ECS01KT2
Throttle Body Boost Tap Kit
Installs between the throttle body and intake manifold. Features two vacuum ports for multiple boost / vacuum references.
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Brand:
ES#:
3136139
Mfg#:
005942ECS01KT2
Carbon Fiber Engine Cover Overlay
Add a touch of carbon fiber to your stock engine cover!
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Brand:
ES#:
3426555
Mfg#:
022526ECS01KT
Carbon Fiber ECU Cover - Audi B9 A4/A5
Compliment your engine bay and hide away the exposed ECU
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Brand:
ES#:
3136956
Mfg#:
019468ECS01A
Performance Baffled Oil Catch Can System
Keep your intake tract clean and carbon free
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Brand:
ES#:
3194688
Mfg#:
019205ECS01KT
Billet Aluminum Oil Filter Housing - Polished
Ditch the easily broken/stripped plastic oil filter housing for a durable billet upgrade
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Brand:
ES#:
3106650
Mfg#:
005887ECS03KT
Billet Engine Oil Dipstick - Polished
A more durable and aesthetically pleasing addition to your engine bay
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Brand:
ES#:
3138261
Mfg#:
018641ECS02-01
Audi B9 A4/S4/A5 Engine Street Shield Aluminum Skid Plate
Protect your vehicle's plastic oil pan with this 4mm thick aluminum skid plate
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Brand:
ES#:
3411957
Mfg#:
019207ECS01KT
Complete Drivetrain Mount Insert Kit
Decrease slop and increase drivetrain rigidity and response!
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Brand:
ES#:
3194637
Mfg#:
019208ECS01KT1
19" Style 084 Wheels - Set Of Four
19x9.5 ET40 66.6CB 5x112 - Gunmetal
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Brand:
ES#:
2823120
Mfg#:
084-1KT
Dynamic+ Performance Lowering Springs
Engineered to improve handling and deliver superb ride quality!
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Brand:
ES#:
3209930
Mfg#:
034-404-1001
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!
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Brand:
ES#:
3176605
Mfg#:
003112ECS01
Front & Rear Exact-Fit Stainless Steel Brake Lines - Kit
Complete set of DOT-compliant lines for an improved pedal feel
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Brand:
ES#:
3171190
Mfg#:
019318ECS01KT
ECS Wheel Spacers - 5mm (Pair)
Get the right size wheel spacer for your vehicle
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Brand:
ES#:
2167469
Mfg#:
002411ECS01A05KT
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Availability:
Ships on Jul 9, 2026
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Ships on Jul 9, 2026
Complete Carbon Fiber Exterior Package
Revamp your B9 A4 S-Line with a complete hand-laid carbon fiber kit
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Save an additional $100 with this exclusive bundle!
Save an additional $100 with this exclusive bundle!
Brand:
ES#:
3236268
Mfg#:
019196ECS01KT
Carbon Fiber Front Lip Spoiler - Audi B9 A4/S4
Hand-laid carbon fiber to upgrade your exterior styling
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Brand:
ES#:
3146390
Mfg#:
019196ECS01A
Carbon Fiber Grille Accent Set - (NO LONGER AVAILABLE)
Hand-laid carbon fiber to upgrade your exterior styling
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Brand:
ES#:
3195023
Mfg#:
019511ECS01KT
No longer available
Carbon Fiber Side Blade Set
Add a touch of style made with real carbon fiber to your Audi
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Brand:
ES#:
3195012
Mfg#:
019189ECS01KT
Carbon Fiber Trunk Spoiler - Audi B9 A4/S4
Add a touch of style and real carbon fiber to your Audi
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Brand:
ES#:
3141741
Mfg#:
019220ECS01A
Carbon Fiber Rear Diffuser - Audi B9 A4
Hand-laid carbon fiber to upgrade your exterior styling
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Brand:
ES#:
3145741
Mfg#:
019193ECS01A