Performance Engine Software
Dinan Performance Engine Software reprograms the engine management system for faster throttle response, a rev-limit increase, and elimination of the top-speed governor.

Free Flow Exhaust
Manufactured from 100% stainless steel, the Dinan rear mufflers for the X5 4.4 substantially reduce weight, while minimizing the flow restrictions presented by the stock mufflers.

High Flow Cold Air Intake System
Dinan’s aggressive intake system for the X5 4.4 increases both the volume and velocity of the air coming into the engine, providing increased horsepower and torque.

High Flow Throttle Body
Dinan's High Flow Throttle Bodies improve intake air flow for additional horsepower and torque gains. The internal diameter of the stock X5 throttle body is bored larger, increasing the air flow area.

High Flow Air Mass Meter

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