Karbonius E36 M3 (Euro S50) Carbon Airbox

The Karbonius E36 M3 (Euro S50) Carbon Airbox is an Evo-style carbon intake solution designed specifically for the European S50B30 and S50B32 engines. Engineered for improved airflow, this airbox — when combined with an Alpha-N remap — has been validated by Karbonius to deliver a power gain of approximately 30 horsepower alongside improved throttle response and an exceptional induction sound.

Manufactured from 100% prepreg carbon fiber and autoclave-cured at Karbonius' facility in Spain under ISO 9001 Management Quality System standards, the airbox weighs just 1.9 kg and is finished in a UV-protective clear coat, available in gloss or matte over a 2x2 twill or 1x1 plain weave. CNC-machined aluminum components and stainless-steel hardware complete the kit. Each piece is individually numbered to guarantee origin and authenticity.

What's Included

• Carbon fiber airbox
• CNC-machined aluminum components
• Stainless-steel hardware
• M Power sticker
• Numbered certificate of authenticity

Product Details

• Weight: 1.9 kg
• Power gain: approximately 30 HP with Karbonius airbox and Alpha-N remap (Alpha-N remap not included)
• Improved throttle response and dramatic induction sound
• Available in 2x2 twill or 1x1 plain weave with a gloss or matte UV-protective clear coat
• 100% prepreg carbon fiber construction
• Autoclave-cured for strength and finish quality
• CNC-machined aluminum components
• Stainless-steel hardware
• Individually numbered for authenticity

Important Notes

• Compatible with Euro S50B30 and S50B32 engines only — not compatible with US-spec S50 or S52

Related Products

• Karbonius E36 M3 / 3-Series Carbon Strut Brace
• Karbonius E36 M3 European Radiator Cover