Performance Air Filter for Mercedes Benz A Class & CLA 45 AMG Engine

High-Velocity Induction for the Mercedes M133 AMG Engine

Who It’s For: Engineered for Mercedes-Benz AMG owners running the high-boost M133 powerplant who are tired of the stock paper filter choking their turbo’s potential.

The Symptom: The factory intake system on the M133 engine is a masterpiece of engineering, but it’s hamstrung by a disposable paper element designed for cost-effective servicing, not peak volumetric efficiency. In a high-pressure turbo application like the A 45 or CLA 45, the engine struggles to pull air through dense paper fibers as RPMs climb. This creates a significant pressure drop across the filter, forcing the turbocharger to work harder to hit its target boost, which increases intake air temperatures and blunts throttle response during spirited canyon runs or track sessions.

The Engineering Fix: This BMC performance filter replaces the restrictive factory media with a multi-layered cotton gauze saturated with low-viscosity oil. By utilizing a "Full Moulding" production process, the filter is created from a single mold with no welded joints, ensuring structural integrity even under the heavy suction of the AMG twin-scroll turbo. The physics are simple: we are increasing the cross-sectional flow area while improving filtration density. This kit captures impurities as small as 7 microns—surpassing the OEM 10-micron standard—while significantly reducing the resistance in the intake tract for a sharper, more immediate throttle snap.

Why Mechanics Choose This Kit

• Precision Filtration: Captures particles down to 7 microns, providing superior protection for the M133’s sensitive internal components compared to the 10-micron factory limit.
• Thermal Stability: The epoxy-coated alloy mesh protects the cotton media from petrol fumes and oxidation, maintaining its shape and flow characteristics under the extreme under-hood heat of the AMG engine bay.
• Lifetime Sustainability: Unlike disposable OEM filters that end up in a landfill, this unit is fully washable and regenerable, designed to last the entire lifespan of your vehicle.

Technical Specifications

Compatibility & OEM Reference

Fits the Following Vehicles:

• Mercedes-Benz CLA (C117/X117) CLA 45 AMG (360 HP) 2013 >
• Mercedes-Benz CLA (C117/X117) CLA 45 AMG (381 HP) 2015 >
• Mercedes-Benz CLASS A (W176) A 45 AMG (360 HP) 2013 >
• Mercedes-Benz CLASS A (W176) A 45 AMG (381 HP) 2015 >
• Mercedes-Benz GLA (X156) GLA 45 AMG (360 HP) 2014 >
• Mercedes-Benz GLA (X156) GLA 45 AMG (381 HP) 2015 >

Interchange Part Numbers:

FB819/04, FB819-04

The Performance Promise

Buy with confidence. We understand the intricacies of the M133 platform. This isn’t just a filter; it’s a tool to help your AMG breathe properly. Backed by real automotive experts and fast shipping.