Rein 11-61-1-438-404 Intake Manifold Adjusting Unit DISA Valve

The Rein 11-61-1-438-404 is an intake manifold adjusting unit, commonly known as a DISA valve (Differential Intake System Adjuster), designed as a direct replacement for BMW applications. This precision-engineered component plays a critical role in optimizing engine performance by controlling the intake manifold air path during different engine speeds.

Key Features:

• Includes integrated O-ring seal for proper mounting and sealing
• Controls intake manifold airflow path during high RPM operation
• Direct OEM replacement design for reliable fitment
• Mounts directly to the lower intake manifold assembly
• Lightweight construction at approximately 0.32 kg (0.71 lbs)

This adjusting unit is essential for maintaining proper engine breathing and performance characteristics. The DISA valve adjusts the effective length of the intake runners to optimize torque and power delivery across the engine's RPM range. OEM part number 11611438404 supersedes previous part numbers 11611247202 and 11611435715.