ECS Project - Audi B8 S4 Build List
The supercharged 3.0T power plant up front, six-speed manual transmission between the seats, and Quattro AWD system make the B8.5 S4 a well-rounded and highly capable package right out of the box, but this B8.5 S4 is no ordinary luxury sedan. Our research and development test mule here features everything we currently offer (and some in-progress secret parts) that help transform this super sedan from modest daily into an absolute weapon. Our suspension upgrades, heat exchanger, intake, big bore throttle body, and more help make this S4 the ultimate highway star it deserves to be.
A true build list inspiration
Fits:
Audi B8 S4
Audi B8.5 S4 / A4 S-Line Carbon Fiber Rear Diffuser
Hand-laid carbon fiber to upgrade your exterior styling
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Brand:
ES#:
3085916
Mfg#:
018359ECS01A
19" Tekniform Style 007 - Set Of Four
19"x8.5" ET45 5x112 - Matte Gunmetal
Brand:
ES#:
3969822
Mfg#:
007-4KT3
Supercharger Inlet Kit - Carbon Fiber - Audi B8 S4/S5 3.0T
Replace the accordion throttle body hose with a smooth carbon fiber tube
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Brand:
ES#:
2836833
Mfg#:
000931ECS02AKT
Luft-Technik Intake Air Scoop - Audi B8 A4/A5/S4/S5
Extends farther down behind the grille to direct more air to the intake system
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Brand:
ES#:
3220796
Mfg#:
017429ECS01
ECS Tuning Street Shield Aluminum Skid Plate Kit
Protect your vehicle's oil pan & electronic steering rack with this 4mm thick aluminum skid plate
10X Entries Into Our F80 M3 Sweepstakes
Fits B8 chassis A4/S4/A5/S5 models up to the 2012 model year
Fits B8 chassis A4/S4/A5/S5 models up to the 2012 model year
Brand:
ES#:
2771379
Mfg#:
003251ECS01AKTKT
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
Magnetic Drain/Fill Plug - Priced Each
Capture harmful particles to prevent wear. M22x1.5
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Brand:
ES#:
2538104
Mfg#:
000857ECS01A
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Availability:
Ships on Oct 27, 2026
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Ships on Oct 27, 2026
Build-Your-Own - ECS Tuning Weighted Billet Aluminum 6 Speed Shift Knobs
Pick your colors and your style! Designed and Engineered by ECS Tuning.
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Brand:
ES#:
4375384
Mfg#:
002262LA
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Availability:
In Stock
In Stock
Performance Baffled Oil Catch Can System - Audi B8 S4/S5 3.0T
Keep your B8 S4/S5 3.0T intake tract clean and carbon free
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Brand:
ES#:
3142968
Mfg#:
016632ECS01KT
Fuel Line Relocation Kit
Re-routes the fuel line underneath the intake tube for a cleaner look!
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From the 2013 model year
From the 2013 model year
Brand:
ES#:
3102572
Mfg#:
000931ECS07
Billet Tunnel Brace - Black - Audi B8/Porsche Macan
Replace your small and weak stamped brace with heavy-duty billet aluminum!
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Brand:
ES#:
3569140
Mfg#:
023780ECS01-01
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Availability:
In Stock
In Stock
Carbon Fiber Engine Cover Kit - Audi 3.0T
Add a touch of carbon fiber to your stock engine cover!
10X Entries Into Our F80 M3 Sweepstakes
Brand:
ES#:
2999048
Mfg#:
015339ECS01
ECS Tuning Transmission Street Shield Skid Plate Kit - Audi B8
Protect your vehicle's transmission pan with a 4mm thick aluminum skid plate
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Brand:
ES#:
3411961
Mfg#:
017881ECS01KT
Billet Aluminum Oil Filter Housing Cap
Aluminum oil filter housing replacement for plastic OE housing cap
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Brand:
ES#:
2998988
Mfg#:
002292ECS01
Rear 2-Piece Tru-Float Scalloped Brake Rotors - Pair (330x22) - (NO LONGER AVAILABLE)
Direct bolt-on replacement - 21% less weight!
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Brand:
ES#:
2681109
Mfg#:
003523ECS02A02KT
No longer available
Carbon Fiber Mirror Cap Set - Audi B8 A4/A5/S4/S5
Upgrade your exterior look
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Fits B8 chassis A4/S4/A5/S5 models with lane change assist - From the 2010 model year
Fits B8 chassis A4/S4/A5/S5 models with lane change assist - From the 2010 model year
Brand:
ES#:
2816885
Mfg#:
010257ECS03KT
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#:
1899278
Mfg#:
ECS41016/63
Adjustable Short Throw Shifter
Find your perfect setting with 4 steps of throw reduction
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Brand:
ES#:
2842154
Mfg#:
004113ECS01A
Audi B8/8.5 A4/S4 Engine Bay Lighting Kit
Seamlessly integrate ultra bright LED lighting under your hood!
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Brand:
ES#:
3690279
Mfg#:
017146ECS01
Performance Lightweight Flywheel clutch Kit - Stage 3+
ECS Lightweight Flywheel with a Spec Stage 3+ clutch kit rated at 595ft/lbs
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Brand:
ES#:
4027478
Mfg#:
003886ECS01AKT8
Billet Fuel Cap Cover - Black Anodized
Upgrade your gas cap to our gorgeous CNC-machined aluminum cover. Easily installs over your existing cap!
10X Entries Into Our F80 M3 Sweepstakes
Brand:
ES#:
3677064
Mfg#:
022506ECS0102
Kohlefaser Luft-Technik Intake System - Audi B8 S4/S5 3.0T
Engineered for dyno proven performance and show quality looks!
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Brand:
ES#:
2746454
Mfg#:
000931ECS01
Audi B8 A4/S4 Facelift Carbon Fiber Radiator Support Cover
Carbon fiber, front and center!
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Brand:
ES#:
3435250
Mfg#:
024714ECS01
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Availability:
Ships on Oct 5, 2026
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Ships on Oct 5, 2026
Audi B8/B8.5 S4/S5 Carbon Fiber Left Side Engine Bay Cover
Cover up unsightly under hood components with carbon fiber style!
10X Entries Into Our F80 M3 Sweepstakes
Brand:
ES#:
3570284
Mfg#:
023149ECS02KT
Build Your Own Audi B8/8.5 S4 3.0T Valved Cat Back Exhaust System - Stainless
Experience your driving passion with our ECS Valved Exhaust System and control your sound with our valved muffler design
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10X Entries For Our Spin To Win Sweepstakes!
10X Entries For Our Spin To Win Sweepstakes!
Brand:
ES#:
4488022
Mfg#:
008553ECS01
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Availability:
In Stock
In Stock
Front 2-Piece Tru-Float Scalloped Brake Rotors - Pair (345x30)
Direct bolt-on replacement - 27% less weight!
10X Entries Into Our F80 M3 Sweepstakes
Brand:
ES#:
2681113
Mfg#:
003523ECS01A01KT
Integrated Engineering 3.0T "Dual Pulley" Power Kit
Turn your Audi B8 S4 or S5 into an all-out street monster with IE's complete Dual Pulley kit! Includes ECU software plus "Dual Pulley" setup
Brand:
ES#:
4351842
Mfg#:
IEPPCGJ2
Billet Engine Oil Cap - Black Anodized
Lose the plastic!
10X Entries Into Our F80 M3 Sweepstakes
Brand:
ES#:
4030546
Mfg#:
022735ECS0101AKT
Carbon Fiber Strut Tower Brace - Audi B8 A4/A5/S4/S5
Provides additional support to the strut towers for flex reduction to enhance your driving experience
10X Entries Into Our F80 M3 Sweepstakes
Vehicle must feature an M8 stud on the passenger shock tower for proper install. Please see product photo
Vehicle must feature an M8 stud on the passenger shock tower for proper install. Please see product photo
Brand:
ES#:
3195022
Mfg#:
008049ECS01KT