Based on reviews from other forums, below is the specs of GrimmSpeed MBC. Over 250 Way Adjustable Heavy Duty SST Dual Ball Detent System -clicks with each turn for active feedback Laser Etched Scale and Labels -easy to read and repeat precise adjustments Extra Long Travel Spring -ONE spring, no need to switch springs Superior Range without Sacrificing Resolution -0-60 PSI capabilities with ultra-fine adjustments Universal Mounting Solution CNC'd From 6061 Aluminum -incredibly durable and ergonomic As per the tuner, Boost gauge is not mandatory as of now. But adds value if you intend to change settings to increase/decrease boost. If you are buying MBC, better to also buy gauge. Its safety recommendation becos, if boost is too much it will directly impact the turbo.