Fits all Pro-R Chassis 600/800 CFI Snowmobiles +3 Easy Horsepower! A great combination to add with your other BMP modifications.
BMP POLARIS PRO-R 600/800 CFI HIGH FLOW AIR BOX
A great modification to get more air and more power is to modify your airbox. Pull the cover off the box and inside you will find a shelf like the one pictured below. Remove this shelf replace it with our BMP High Flow Pro-R Shelf. We found holes in the top side of the shelf like shown worked out the best; gaining you 3 horsepower through mid to peak. Some may think more is better and want to add holes in the bottom side of the shelf also. We advise to not do this! This creates a strange flow wave in the airbox and only gains 1hp. Removing the shelf all together gained 1.5-2hp. No fuel modifications needed on a stock or slightly modified machine, just cheap and easy horsepower!