The other day we had a client come in looking to get just a tad more out of his car than what they give you from the factory. His 2014 BMW 335i M Sport performs just as it was intended. However the vehicle seemed to lack a bit of performance from the factory and to fill that void we gathered what we felt would best reveal that powerful N55 motor. We started with the basics and the stock air box had to go.

 Agency Power Cold Air Intake:

To begin this process, start by removing the MAF and IAT like pictured below. You will also want to loosen the factory hose clamp and coupler at the front left of the engine bay.

Once the factory airbox has been removed, you will need to move a few pieces over to the new Agency Power Cold Air Intake. The Mass Air Flow sensor or MAF will need to swapped over.

Properly secure the MAF and dry cotton gauze air filter to the intake piping. Once you have completed that the unit is ready to be installed. The Agency Power CAI is designed to use factory mounting points when being installed. Tighten the hose clamp on to the new intake tubing and reinstall the MAF and IAT.

The last step in to encase the new filter with the provided Agency Power heat shield. Not only does the shield provide a stylish look to the vehicles engine compartment but it also blocks out warm air trying to enter the intake. Secure both the intake piping and heat shield with the factory hardware and the Agency Power intake system is ready to go.

Agency Power Race Downpipe:

With the intake installed and it was time to move on to the installation of the Agency Power Race downpipe. The instal process is not very difficult if suspended on a lift but is recommended to be installed by a professional mechanic. Lift the vehicle and set the lift on to its locks. Make sure that the vehicles exhaust has cooled off completely before beginning the process as you will be working directly with these components.

Start by loosening up both V-Band’s holding the factory downpipe/catalytic converter in, one attached to the flex tubing and the other at the turbo.

Once the V-Bands are loosened, disconnect both oxygen sensors from the pig tails (Note: you may have to lower the vehicle to access these). Carefully lower the OEM downpipe/cat from the vehicle. Once out swap over the oxygen sensors into the same location of the new Agency Power Race Downpipe.

Installation is the opposite of the removal process. Be sure to plug both oxygen sensors back in, and to tighten both v-bands. Start the car up  and hear the difference!