fmf pipes are nickle plated and their is not much that you can do to it but to use a little polish something less agressive than mothers, followed up by some wax and keep up on it for maint. as for the silencer for those who dont have access to proper polishing equipment, mothers with 000 steel wool will cut the finish fairly well and than use strait mothers with a clean dry towlto finish, again wav to help maintain the finish because it will oxadise. hope this helps?