As far as the Mugen goes; typically they will up date a model every two to three years. Mugens hop up list for there cars would be considered short when compared to other brands. Now as far as after market "bling" I would agree, there is a whole lot of shiny stuff that does nothing for lap times.
Let me know and all P.M. ya a price...
MUGEN SEIKI NOVA ROSSI ENETTI TYRES HUDY PROFESSIONAL TOOLS
BYRONS FUEL AIRTRONICS RADIO EQUIPMENT PROTOFORM RACE BODIES
MUGEN RACING RC AMERICA AKA RACING NUGGETS RACING DESOTO RACING