yz426 large capacity airbox

who can tell me if a large capacity airbox makes a vast difference in power,or is my dealer just trying to sell me one he tells me the yz426 dosent breath properly is this true

You can remove the entire top off your stock box and this works well. We use a DSP carbon box with the stock boot on our WR 426 (2002) that we race in Baja. It works great, but I use a modified Raptor Outerwear (top of air box replacement part available through White Bros.) on the top to keep filter replacement down to a minimum

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