aFe 51-31662 Magnum FORCE Stage-2 CAI for 08-13 BMW M3 S65 4.0L V8

Vehicle Fitment

• 2008-2013 BMW M3 (E90/E92/E93) - S65 4.0L V8

Features

• Magnum FORCE Stage-2 Pro DRY S cold air intake system
• Washable & reusable Pro DRY S synthetic air filter media
• Rotomolded plastic intake tube for optimized airflow
• One-piece powder-coated heat shield for thermal protection
• Increased airflow up to ~41% over stock intake
• Improves throttle response, horsepower, and torque
• Direct bolt-on fitment - no cutting or drilling OEM parts required
• Includes all clamps, couplings, and mounting hardware

Specifications

• Part Number: 51-31662
• Filter Type: Pro DRY S dry synthetic filter
• Airflow Increase: Up to ~41% over stock intake
• Heat Shield: Powder-coated one-piece design
• Fitment: Dedicated application for BMW E90/E92/E93 M3 S65 4.0L V8
• Emissions: CARB EO# D-550-38 - CARB compliant legal in all 50 states
• Performance Gains: Up to ~12 HP and ~9 lb-ft torque (approx.)

Included Components

• 1x Pro DRY S dry synthetic air filter
• 1x Rotomolded plastic intake tube
• 1x Powder-coated heat shield
• 1x Set of clamps and couplings
• 1x Complete mounting hardware kit

Product Description

The aFe 51-31662 Magnum FORCE Stage-2 Cold Air Intake System is a performance-oriented upgrade specifically engineered for the 2008-2013 BMW M3 powered by the S65 4.0L V8 engine. Designed to replace the restrictive factory intake components, this Stage-2 system utilizes a high-flow Pro DRY S synthetic air filter and a precision molded intake tube to deliver up to ~41% more airflow than stock. The result is a measurable increase in horsepower, torque, and throttle responsiveness while preserving smooth daily drivability.

Installation is straightforward with included hardware and uses factory mounting locations without cutting or drilling. The integrated heat shield helps isolate the intake from under-hood heat for cooler, denser air delivery, maximizing combustion efficiency. This cold air intake system is CARB compliant (EO# D-550-38) and legal for use in all 50 states. It's ideal for BMW M3 owners looking for a balanced performance enhancement that complements both street and occasional track use.