In most cases you wont have to clean out the holes, although the bolts maybe very corroded on the outside, the area of bolt screwed into the heads will, in the majority of cases remain very clean and corrosion free.You only really need a basic tool kit i.e imperial sockets, spanners and a selection of screwdrivers. I would take some wire brushes however and a can of paint to clean of any corrosion around the ports on the heads as these areas obivously arent accesible with the manifolds in place. To keep the new manifolds looking clean and rust free at the joints it does pay to slightly overspray the joints with some decent quality black paint to slow down any corrosion on gasket faces. Oli
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