Well i already had the hallman pro rx but I just recently purchased the add-on kit to mount it in-cabin... i followed the instructions to the T but for some reason the boost knob just doesn't make a difference.... its stuck at 12psi damnit



anyone else have any experience with this?

Thanks

 

I have the same MBC w/ in cabin adjustment (which is awesome); make sure the cable isn't binding and is turning freely. Then verify you have the MBC running to the correct locations for boost/vacuum source. Shouldn't be too complicated as you are basically replacing the knob on the MBC w/ a cable that runs into the car.

 

theres my problem... the actual cable doesn't turn at all