Hi Flow Air Box Shelf / Pro-R 600 - 800 CFI Category_Default Category/SLED/Yamaha/Mountain Max '20+ 10-SPK-301

10-SPK-301

The slip-on muffler allows for the use of our quiet cap

Higher peak rpm and HP

Zinc coated

Pipe comes with 2" stinger designed for sea-level elevation

Hi Flow Air Box Shelf / Pro-R 600 - 800 CFI Category_Default Category/SLED/Yamaha/Mountain Max '20+ 10-SPK-301A 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