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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!
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.
Brand: APR - Corporate Logo
ES#: 3146864
Mfg#: DPP-2.0T-MLB-SP

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Availability:
In Stock
$499.99 USD
This product is lifetime replacement eligible Lifetime Replacement
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!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
For vehicles up through the 2018 model year only (Pre-Facelift)
Brand: ECS - Corporate Logo
ES#: 4488077
Mfg#: 021275ECS01

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Availability:
Ships on Nov 13, 2026
On SALE
Starting at $1156.67 USD
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This product is lifetime replacement eligible Lifetime Replacement
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: ECS - Corporate Logo
ES#: 3188267
Mfg#: 019218ECS01

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Availability:
In Stock
On SALE Save 20%
$383.99

This product was last offered at the strikethrough price on
05-02-2026

$306.99 USD
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This product is lifetime replacement eligible Lifetime Replacement
(2017+) B9 A4/A5 2.0T Kohlefaser Luft-Technik Intake System
Engineered for dyno proven performance and show quality looks!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Does not fit models equipped with a MAF sensor (DBPA or DPAA engine codes) - Please verify prior to order
Brand: ECS - Corporate Logo
ES#: 3143733
Mfg#: 019183ECS01

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Availability:
Special Order: No Guaranteed ETA
On SALE Save 15%
$1003.99

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

$853.39 USD
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This product is lifetime replacement eligible Lifetime Replacement
Luft-Technik B9 A4 Intercooler And Charge Pipe Kit
Full kit to upgrade your charge pipes and FMIC
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Brand: ECS - Corporate Logo
ES#: 3557444
Mfg#: 019219ECS01AKT2

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Availability:
Ships on Sep 23, 2026
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On SALE Save 15%
$1060.99

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

$901.84 USD
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This product is lifetime replacement eligible Lifetime Replacement
Luft-Technik Intake Air Scoop
Extends farther down behind the grille to direct more air to the intake system
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Brand: ECS - Corporate Logo
ES#: 3183334
Mfg#: 019848ECS01

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Availability:
In Stock
On SALE Save 10%
$135.99

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

$122.39 USD
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This product is lifetime replacement eligible Lifetime Replacement
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
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand: ECS - Corporate Logo
ES#: 3221001
Mfg#: 020870ECS01KT

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Availability:
Ships on Jul 31, 2026
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$46.99

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

$35.24 USD
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on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
Silicone Turbo Inlet Hose
Flexible silicone smooths the intake tract & provides unimpeded airflow. The ultimate in looks and durability!
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Brand: ECS - Corporate Logo
ES#: 4017429
Mfg#: 019216ECS02

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Availability:
In Stock
On SALE Save 25%
$96.99

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

$72.74 USD
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on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
Turbo Muffler Delete Pipe
Replace the factory turbo muffler with a straight through billet aluminum delete pipe kit
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand: ECS - Corporate Logo
ES#: 3999162
Mfg#: 019330ECS01KT

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Availability:
In Stock
On SALE Save 25%
$140.99

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

$105.74 USD
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This product is lifetime replacement eligible Lifetime Replacement
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: ECS - Corporate Logo
ES#: 3136138
Mfg#: 013576ECS01KT2

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Availability:
In Stock
On SALE Save 20%
$88.99

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

$71.19 USD
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This product is lifetime replacement eligible Lifetime Replacement
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: ECS - Corporate Logo
ES#: 3136139
Mfg#: 005942ECS01KT2

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Availability:
In Stock
On SALE Save 15%
$100.99

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

$85.84 USD
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This product is lifetime replacement eligible Lifetime Replacement
Carbon Fiber Engine Cover Overlay
Add a touch of carbon fiber to your stock engine cover!
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Brand: ECS - Corporate Logo
ES#: 3426555
Mfg#: 022526ECS01KT

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Availability:
In Stock
On SALE Save 15%
$262.99

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

$223.54 USD
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This product is lifetime replacement eligible Lifetime Replacement
Carbon Fiber ECU Cover - Audi B9 A4/A5
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: ECS - Corporate Logo
ES#: 3136956
Mfg#: 019468ECS01A

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Availability:
In Stock
On SALE Save 15%
$214.99

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

$182.74 USD
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This product is lifetime replacement eligible Lifetime Replacement
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: ECS - Corporate Logo
ES#: 3194688
Mfg#: 019205ECS01KT

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Availability:
In Stock
On SALE
$616.99

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

$586.14 USD
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This product is lifetime replacement eligible Lifetime Replacement
Billet Aluminum Oil Filter Housing - Polished
Ditch the easily broken/stripped plastic oil filter housing for a durable billet upgrade
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand: ECS - Corporate Logo
ES#: 3106650
Mfg#: 005887ECS03KT

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Availability:
In Stock
On SALE Save 20%
$129.99

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

$103.99 USD
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This product is lifetime replacement eligible Lifetime Replacement
Billet Engine Oil Dipstick - Polished
A more durable and aesthetically pleasing addition to your engine bay
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand: ECS - Corporate Logo
ES#: 3138261
Mfg#: 018641ECS02-01

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Availability:
In Stock
On SALE Save 25%
$100.99

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

$75.74 USD
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on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
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
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand: ECS - Corporate Logo
ES#: 3411957
Mfg#: 019207ECS01KT

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Availability:
In Stock
$391.99 USD
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This product is lifetime replacement eligible Lifetime Replacement
Complete Drivetrain Mount Insert Kit
Decrease slop and increase drivetrain rigidity and response!
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Brand: ECS - Corporate Logo
ES#: 3194637
Mfg#: 019208ECS01KT1

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Availability:
In Stock
On SALE Save 10%
$242.99

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

$218.69 USD
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This product is lifetime replacement eligible Lifetime Replacement
19" Style 084 Wheels - Set Of Four
19x9.5 ET40 66.6CB 5x112 - Gunmetal
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Brand: Alzor - Corporate Logo
ES#: 2823120
Mfg#: 084-1KT

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Availability:
In Stock
On SALE Save 40%
$1300.00

This product was last offered at the strikethrough price on
05-02-2026

$779.99 USD
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This product is lifetime replacement eligible Lifetime Replacement
Dynamic+ Performance Lowering Springs
Engineered to improve handling and deliver superb ride quality!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand: 034Motorsport - Corporate Logo
ES#: 3209930
Mfg#: 034-404-1001

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Availability:
In Stock
$326.00 USD
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This product is lifetime replacement eligible Lifetime Replacement
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: ECS - Corporate Logo
ES#: 3176605
Mfg#: 003112ECS01

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Availability:
In Stock
On SALE Save 25%
$224.99

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

$168.74 USD
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This product is lifetime replacement eligible Lifetime Replacement
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: ECS - Corporate Logo
ES#: 3171190
Mfg#: 019318ECS01KT

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Availability:
In Stock
$230.99 USD
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This product is lifetime replacement eligible Lifetime Replacement
ECS Wheel Spacers - 5mm (Pair)
Get the right size wheel spacer for your vehicle
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Brand: ECS - Corporate Logo
ES#: 2167469
Mfg#: 002411ECS01A05KT

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Availability:
Ships on Jul 9, 2026
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On SALE Save 25%
$137.99

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

$103.48 USD
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This product is lifetime replacement eligible Lifetime Replacement
Complete Carbon Fiber Exterior Package
Revamp your B9 A4 S-Line with a complete hand-laid carbon fiber kit
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Save an additional $100 with this exclusive bundle!
Brand: ECS - Corporate Logo
ES#: 3236268
Mfg#: 019196ECS01KT

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Availability:
Ships on Nov 19, 2026
On SALE Save 24%
$3705.99

This product was last offered at the strikethrough price on
01-03-2026

$2802.93 USD
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This product is lifetime replacement eligible Lifetime Replacement
Carbon Fiber Front Lip Spoiler - Audi B9 A4/S4
Hand-laid carbon fiber to upgrade your exterior styling
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand: ECS - Corporate Logo
ES#: 3146390
Mfg#: 019196ECS01A

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Availability:
In Stock
On SALE Save 41%
Limited Qty Sale
$875.99

This product was last offered at the strikethrough price on
05-02-2026

$515.77 USD
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This product is lifetime replacement eligible Lifetime Replacement
Carbon Fiber Grille Accent Set - (NO LONGER AVAILABLE)
Hand-laid carbon fiber to upgrade your exterior styling
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand: ECS - Corporate Logo
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: ECS - Corporate Logo
ES#: 3195012
Mfg#: 019189ECS01KT

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Availability:
Ships on Nov 19, 2026
On SALE Save 10%
$1050.99

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

$945.89 USD
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This product is lifetime replacement eligible Lifetime Replacement
Carbon Fiber Trunk Spoiler - Audi B9 A4/S4
Add a touch of style and real carbon fiber to your Audi
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand: ECS - Corporate Logo
ES#: 3141741
Mfg#: 019220ECS01A

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Availability:
In Stock
On SALE Save 28%
Limited Qty Sale
$694.99

This product was last offered at the strikethrough price on
05-02-2026

$500.99 USD
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This product is lifetime replacement eligible Lifetime Replacement
Carbon Fiber Rear Diffuser - Audi B9 A4
Hand-laid carbon fiber to upgrade your exterior styling
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand: ECS - Corporate Logo
ES#: 3145741
Mfg#: 019193ECS01A

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Availability:
In Stock
On SALE
$774.99

This product was last offered at the strikethrough price on
05-02-2026

$719.99 USD
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This product is lifetime replacement eligible Lifetime Replacement

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Manufacturer names and/or part numbers are used only for identification purposes.

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