Forge Inlet Hose – BMW 440i

When looking at the B58 engine within the M140i/240i/340i/440i engine bay it’s clear that BMW had left some room for modification within the inlet tract, the sound resonator and accordion ribs cause significant turbulence to the airflow causing a detriment to the engine’s potential performance. By removing these, and replacing it with five-ply silicone construction you gain a host of performance upgrades, including:

Significant power gain of over 9bhp engine power and 7nm of torque.
Improved induction noise.
Multi ply silicone construction improves longevity of FMINLH25 over that of the OEM hose.
5 ply silicone construction will be able to handle strain of engine mapping far better than OEM hose.
Fitting with no specialist tools in approximately half an hour. One major difference of FMINLH25 is the diameter of the hose at the airbox end. Usually this is 85mm diameter, however FMINLH25 is 90mm diameter, and uses a silicone reducer sleeve so that it fits the OEM airbox correctly. This increase of 5mm diameter allows the inlet hose to be used with a wider variety of airbox/intake systems while also increasing the volume and de-restricting the flow of the OEM part,