BMW E46 M3 Hybrid Carbon Airbox

The Eventuri Hybrid Airbox for the BMW E46 M3 brings the sound of the CSL airbox together with the driveability of a regular intake. A CSL-style airbox normally means running without the MAF sensor, which calls for an ECU conversion or remap and often costs throttle response. The Hybrid Airbox keeps the OEM MAF sensor, so it works on the standard engine software with no remap.

The main airbox in pre-preg carbon fibre houses the six trumpets and the breather connections, and is designed to resonate under load for the CSL sound. The thermoplastic trumpets are moulded for an accurate, smooth inner surface and reinforced with CNC-machined stainless steel rings, and the trumpets and breather adapters are sealed with mechanical fasteners and gaskets that stay airtight through heat cycles and vibration. The carbon snorkel carries the OEM MAF sensor on a CNC-machined boss. Eventuri's patented Venturi filter housing removes the tortuous path of the OEM airbox, and a carbon scoop that clicks into the front right-hand brake duct feeds the filter with cold air while leaving room for the brake cooling.

Key Features:

• CSL-style intake sound with the OEM MAF sensor retained, no remap needed
• Main airbox and snorkel in pre-preg carbon fibre
• Six moulded thermoplastic trumpets with stainless steel reinforcement rings
• Patented Venturi filter housing with a bespoke dry high-flow filter
• Carbon cold-air scoop in the front right-hand brake duct
• Breather hoses and adapters included; cars with an SMG gearbox also need an SMG reservoir relocation kit

Performance:

• +20 to 22 hp and +8 to 13 lb-ft (approx. +11 to 18 Nm) on the OEM ECU tune, independently dyno tested back to back by Dream Automotive (UK)

Fitment:

• BMW M3 (E46)

Options:

• With full carbon intake: the complete system, including filter housing, filter and cold-air scoop
• Without intake: for owners of an existing Eventuri E46 M3 intake, who reuse their filter housing and scoop

Includes (with full carbon intake):

• Carbon fibre main airbox
• Carbon fibre airbox snorkel with MAF tube
• Moulded thermoplastic trumpets with stainless steel reinforcement rings
• Carbon fibre filter housing
• Bespoke dry high-flow filter
• Carbon fibre cold-air scoop
• Stainless steel brackets and flanges
• CNC-machined breather adapters
• Custom EPDM flexible coupler
• Silicone couplers
• Crankcase breather hose
• Additional vacuum tubing

The version without intake contains the same parts, except the filter housing, filter and scoop.