[xcelir8bmw]

OK, Intake Tube.

CTS Intake Tube too small compared to stock outer circle. Must be larger on M35i, specifically 3.5" ID.

Instead of getting a reducer and adding more crap to the install, simply trim the stock intake tube outer rim to fit the MAP sensor and welded flange.

The inner part of the stock intake inner lip and the CTS Intake tube now meet very tight. Move stock worm bracket towards back of car, in and over a ridge to secure stock intake tube and CTS intake tube securely.

And if you have to put the stock airbox back on, that trimmed area will be covered by the worm clamp, so no worries.

All good.