Thread: Custom Intake
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      10-16-2016, 09:44 AM   #1
Brandon6127C
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Drives: 2011 BMW 535i M sport
Join Date: Sep 2016
Location: Indiana

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I didn't want to pay $200 for a BMS intake. So I looked and I made my own.
I used an UPG8 4 ply silicone hose and a universal K&N filter that had similar dimensions to the BMS intake filter. Total cost $54

I measured the ID of the intake (roughly 3.5"). In order to get a strong enough silicone hose that would fit that that dimension it ended up being a 3.18" ID hose and a 3.56" OD. The difference of .06" made a nice tight fit into the intake. I reused the original clamp from the stock intake.
The silicone hose is a 45 deg in order to move it more into the open space of the engine compartment.

With BMS you keep the base of stock intake which forces BMS to route air through a small oval shape tube then opens up. This custom intake is completely open and smooth.

Once the lower section of stock box is removed the 3 locating rods for the base section are still in place. One of the rods is positioned perfectly to support the end of the filter once installed. The filter ID is 3.5" also like the ID of stock intake so it's perfect fit.

Could use larger filter if you wanted with ease

Have videos of stock vs this intake, just email if you want to see them.
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