Induction kit for a laguna 2.0dci 150

Hi all,
following a recent purchase of another laguna 2.0dci estate, ive found it to be flat compared to the last one, ive replaced the air filter with a K&N flat type & still find it flat, doesn't seem to start pulling till around 3300rpm but seems to run our of steam at around 4200rpm,
the turbo on the last lag kicked in around 2700rpm and was still pulling at 4300rpm

I do intend to get it remapped but the question is...can I/should I, get & fit a cold air induction kit without removing the MAF unit
would be interested in ppls views before I go for the remap

cheers

	MAF MAF A mass airflow sensor is used to determine the mass of air entering the engine. The air mass information is necessary to calculate and deliver the correct fuel mass to the engine. Air is a gas, and its density changes as it expands and contracts with temperature and pressure. In automotive applications, air density varies with the vehicle's operating environment, and is an ideal application for a mass sensor. (See stoichiometric, ideal gas law, and density.) There are two common types of mass airflow sensors in usage on gasoline engines. They are the vane meter and the hot wire. Neither design employs technology that measures air mass directly. However, with an additional sensor or two, the engine's air mass flow rate can be accurately determined. Both approaches are used almost exclusively on gasoline burning, EFI (electronic fuel injection) engines. Both sensor designs output a 0 - 5.0 volt signal that is proportional to the air mass flow rate, and both sensors have an IAT sensor (intake air temperature) incorporated into their housings. When a MAF is used in conjunction with an exhaust gas oxygen sensor, the engine's air/fuel ratio can be controlled very accurately. The MAF sensor provides the open-loop predicted air flow information (the measured air flow) to the engine's ECU, and the EGO sensor provides closed-loop feedback in order to make minor corrections to the predicted air mass.

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Induction kit for a laguna 2.0dci 150