at that price, you can guarantee it's fake. the original Mugen "dildo" shift knob has the logo etched in. the ones in your link are probably just screened on and will fade away eventually.
i would also advise not to buy from that website -- just a personal opinion. their webpage looks like something pulled off of a free html/css template; very unprofessional IMO. seems kinda sketchy. you could easily find a Mugen replica knob on ebay for the same price
