Next batch begins shipping June 8st 2026. All Pre-orders are non-refundable

Introducing the A2D / Modalworks M157 / M278 Ultimate Air Intake System, a joint development product designed to deliver a groundbreaking performance upgrade.  Designed and manufactured in the USA, this system is the only one of its kind that completely reroutes the entire airflow path, ensuring maximum efficiency and power. This design reverses the inlet and turbo tubes, which provides many benefits, including a reduced number of bends, increased size, and the ability to relocate PCV and MAP sensors for increased efficiency. 

Installed on the world's fastest stock turbo M157, it demonstrates real-world performance gains. With this innovative design, expect to see 60-130mph DRAGY times reduced by 0.5 to 2 seconds, based on supporting mods, tune, and environmental conditions.   

Compatibility:

• E63(S) AMG (W212/S212) – M157 5.5L V8 BiTurbo – (2011 – 2016)
• CLS63(S) AMG (C218/W218/X218) – M157 5.5L V8 BiTurbo – (2011 – 2017)
• E500 (W212/S212) – M278 4.7L V8 BiTurbo – (2013 – 2016)
• CLS 500 (C218/W218/X218) – M278 4.7L V8 BiTurbo – (2012 – 2018)
• E550 (W212/S212) – M278 4.7L V8 BiTurbo – (2011 – 2016)
• CLS 550 (C218/W218/X218) – M278 4.7L V8 BiTurbo – (2011 – 2016)

Technical Specifications:

• Filter Enclosure Housing: Constructed from a composite of nylon and carbon fiber for strength, reduced weight, and enhanced aesthetics. Each box includes gaskets that ensure an air-tight seal against the hood, preventing hot air recirculation.
• Air Filter: designed for maximum air flow with an 4.5” inlet. Washable and reusable for longevity.
• Air Tubes: CFD (Computational Fluid Dynamics) designed with a tapering profile from a 4.5" inlet down to the turbocharger for optimal airflow efficiency and reduced turbulence, and constructed from robust 6-ply reinforced silicone for added strength and temperature resistance.
• Air Connections: Precision CNC-machined air connections for reliability and performance.
• Silicone Hoses: Comes with robust silicone air hoses specifically for the PCV (Positive Crankcase Ventilation) system, ensuring durability and a leak-proof seal.
• Air Pressure Sensor: Each kit comes with two extension harnesses to mount your sensors in the optimal location for accurate readings that prevent check engine lights.
• Oil Lines: Includes new high-strength lines and billet CNC fittings and clamps for a secure, high-performance connection.

Installation:

• Direct bolt-on system, no permanent modifications required.
• Includes all necessary hardware and instructions for a precise fit.
• Requires removal of the OEM transmission cooler oil lines
• Estimated installation time: 3-4 hours with basic tools.

Included in Each Kit:

• 2x air inlet tubes
• 2x filter enclosure boxes with gaskets
• 2x high flow air filters
• 2x filter to intake tube velocity stacks
• 4x intake tubes
• 2x billet air intake tube joiners
• 2x PCV silicone molded hose extensions
• 2x PCV relocation fittings 
• 2x PCV harness extenders 
• 2x high-temp oil lines
• 4x billet oil line adapter fittings

Video Instructions