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An ARM N63 Intake is required to install the ARM N63 Front Facing Intake Upgrade

If you're looking to increase the volume of your BMW M850i without needing to replace the downpipes

• 2x ARM Midpipe Gaskets

The ARM F80 M3 Downpipes relieve the stressful back-pressure caused by high-boost tunes

• ARM Constant Tension T-Bolt Clamps

• 1x ARM S58 Crossover Pipe

This allows the correct oxygen sensor data to be sent to the DME

COOLING IAT's

0L BMW F34 335i xDrive N55 3

0L BMW F36 440i Gran Coupe B58 3

at least from your exhaust

one for the stock turbos and one for the upgraded turbos