Boost control knob

Hello all, new to the group and a new owner of a used 2011 Tundra 5.7l that's had the Magnuson TRD supercharger installed. This was already installed when I bought the rig and I'm becoming familiar with it. Fun truck to drive however I have a question about the boost control knob. It's a knob that the outer end and lower portion are adjustable separately and I'm wondering which portion does what? Any input is most appreciated!

 

Welcome from LA (Lower Alabama)! We have a few who have supercharged their trucks. Ask this question in the General forums and they might be more likely to see the question.

 

Welcome from NY.

 

Welcome from Pennsylvania

 

Thank you all for the friendly reception! And ya know what?! That knobber I thought was control for supercharger boost was actually a damn control knob for a concealed trailer brake controller! There's a laugh for everyone's sunday evening!

 

Welcome from OKC! Never seen such a brake controller adjustment arrangement. Enjoy your ride!

 

Ha, that's pretty funny. I mean, to be fair, it does say boost and you do have a SC, so not an entirely unreasonable assumption.

 

Looks similar a RedArc brake controller. That's pretty funny, though.