M278 Aluminum Intake Tubes – W212 W218 E550 CLS550 Upgrade Kit

Let your M278 4.7L V8 BiTurbo breathe the way it was meant to. These CNC-bent aluminum intake tubes replace the restrictive OEM plastic pipes on W212 / W218 / W207 / C207 550 models — improving airflow, throttle response, and turbo efficiency while keeping a clean OEM+ engine bay appearance.

The stock plastic intake tubes on the M278 4.7L V8 were built for refinement, not maximum flow. Under heat and boost they can soften and distort, disrupting airflow before the turbochargers. These aluminum tubes give your E550, CLS550, or E-Class coupe/cabriolet a smoother, more efficient inlet path that supports tuning, harder driving, and repeatable performance.

Key Features

• High-flow aluminum construction: rigid tubing that won't crack, flex, or deform under heat and boost like aged plastic.
• Smoother turbo inlet airflow: reduces turbulence and pressure drop before the turbos.
• Motorsport-grade silicone couplers: heat-resistant and boost-rated for stock or tuned M278 applications.
• Direct-fit engineering: designed around factory airboxes and turbo inlets — no cutting or permanent modifications.
• Optional Cerakote thermal finish: helps control radiant heat and improve intake air temperature stability.
• OEM+ stealth appearance: clean routing that blends into the engine bay of any E550 or CLS550.

Real-World Performance Benefits

• Sharper throttle response: faster, more stable airflow as you roll into boost.
• Stronger midrange torque: better volumetric efficiency where the 4.7L biturbo makes its power.
• More consistent performance: less heat soak and smoother airflow for repeatable acceleration.
• Supports tuning and bolt-ons: ideal alongside ECU tunes, intake spacers, high-flow filters, and cooling upgrades.

Fitment Compatibility (M278 4.7L BiTurbo, Non-AMG)

Installation

• Direct bolt-on replacement for OEM plastic intake tubes.
• Install time: ~45–90 minutes with basic hand tools.
• Compatible with OEM airboxes and high-flow panel filters.
• No tune required — works with stock ECU calibration.

What's Included

• Left & right CNC-bent aluminum intake tubes (M278-specific)
• High-temp silicone couplers
• Stainless T-bolt clamps
• Optional Cerakote thermal coating (if selected)

Recommended Supporting Mods

• M278 Intake Filter Spacer Kit →
• Custom ECU Tuning for M278 4.7L BiTurbo →
• M278 Turbo Blankets & Heat Management →

Built & Tested by BenzUnited

We've spent over 12 years daily-driving, tuning, and refining Mercedes-Benz 550 and AMG platforms. Every upgrade we produce is tested in-house across real mileage, real heat, and real boost — not just theoretical dyno curves. That's why our hardware fits, lasts, and performs where it matters: on the road.

Buy With Confidence

• Free U.S. shipping with tracking on all orders.
• Fitment confirmed before you buy: not sure it fits your exact car? Send us your VIN and we'll verify before you order.
• Mercedes specialists: we focus exclusively on Mercedes platforms — we know the M278 inside out.
• Real support: questions before or after purchase go straight to us, not a call center.