RARE Kato N Scale UP Big Boy 4-8-8-4 REPLACEMENT PARTS SET. Complete set of side rods, slide valve assys, and kingpins. Basically everything that reciprocates on the drivers. These are brand new in sealed package mint undamaged. There are 10 separate envelopes fill with many parts, over 60 small parts total. What is pictured is what you receive. ask any questions before bidding