Yamaha RD400 Uni Air Filter for Stock Air Box (all years CDEF)

Description RD400 Uni Air Filter for Stock Air Box. High performance air filter for RD400(all) stock air box. Note this filter is made and specified to work in the stock air box of the 1976-1979 RD400. This filter looks taller than the stock filter but the top and bottom are foam and will compress when installed in the box and the lid tightened down.