Folks, looking at upgrading the intake manifold and have narrowed it down to two choices - the Glacier Diesel unit and the Pusher 3.5" unit. Pusher claims a 49.4% increase in flow over stock, does anyone know what Glacier Diesel claims for an increase. Anyone that is using either unit, please post and LMK. I've got some concerns in regards to the Glacier unit since it doesn't use a 6th bolt but has a "stud" to keep the gasket in place. Anyone using the Glacier unit, are you having any problems or are you completely satsfied?