Performance Air Filter for Mercedes Benz C Class G Class GLC BiTurbo V8 Engine

Maximize Volumetric Efficiency: BMC High-Flow Filtration for the M177 & M176 BiTurbo V8

Who It’s For: Engineered for Mercedes-Benz owners running the M177 AMG or M176 4.0L BiTurbo V8 powerplants who demand better throttle response and superior filtration without modifying the factory airbox.

The Symptom: The factory intake system on the 4.0L BiTurbo V8 is a masterpiece of packaging, but it is hampered by thick, restrictive paper filters. These OEM elements are designed for silence and long service intervals, creating a significant pressure drop as air tries to pass through dense cellulose fibers. This restriction forces your turbochargers to work harder to achieve target boost, increasing intake air temperatures and softening the immediate “snap” of the throttle when you tip in during aggressive driving.

The Engineering Fix: BMC replaces that restrictive paper with a multi-layered cotton gauze soaked in low-viscosity oil, reinforced by an epoxy-coated alloy mesh. By utilizing a “Full Moulding” system, this filter is created from a single mould with no welded joints, ensuring it won’t crack or leak under the high-vacuum conditions of a twin-turbo setup. This design improves airflow significantly while catching impurities as small as 7 microns—surpassing the OEM 10-micron standard—protecting your turbo compressor wheels while allowing the engine to breathe with far less resistance.

Why Mechanics Choose This Kit

• Optimized Turbo Spool: By reducing the intake restriction, the M177/M176 turbos can reach target boost pressure more efficiently, resulting in a noticeable reduction in lag.
• Lifetime Durability: Unlike disposable paper filters, this unit is washable and regenerable using a BMC service kit, making it the last filter your Mercedes will ever need.
• Precision Seal: The specialized rubber compound used in the moulding process ensures a perfect, airtight seal within the complex AMG airbox, preventing “dirty air” bypass.

Technical Specifications

Compatibility & OEM Reference

Fits the Following Vehicles:

• Mercedes-Benz CLASS C (W205/A205/C205/S205) C 63 AMG [FULL KIT] (476 HP | 2014 >)
• Mercedes-Benz CLASS C (W205/A205/C205/S205) C 63 AMG S [FULL KIT] (510 HP | 2014 >)
• Mercedes-Benz CLASS G (W461/463) G 500 4X4 [FULL KIT] (421 HP | 2015 > 2017)
• Mercedes-Benz GLC / GLC COUPÉ (X253/C253) GLC COUPÉ AMG 63 S [FULL KIT] (476 HP | 2017 >)
• Mercedes-Benz GLC / GLC COUPÉ (X253/C253) GLC COUPÉ AMG 63 S [FULL KIT] (510 HP | 2017 >)

Interchange Part Numbers:

FB845/20, B: 128mm, A: 285mm

The Performance Promise

Buy with confidence. At our shop, we know that the M177 engine deserves better than generic parts. This BMC filter is the standard for European performance, used in top-tier motorsport and chosen by tuners worldwide for its reliability and measurable flow improvements. Backed by real automotive experts and fast shipping.