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      09-28-2018, 04:50 PM   #9
cecaa850
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Drives: 2018 M2
Join Date: May 2018
Location: South East TX.

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Quote:
Originally Posted by 2009nj335i View Post
Stage 3 is a lpfp upgrade. It uses the factory pump and runs a secondary Walbro that's fired by a Hobbs switch. Hobbs switch goes in the meth bung of the charge pipe and activates at 4 psi. I've had this upgrade in my m2 for a couple months and it's been amazing.
Do you have a link to what you purchased?
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