ye the wistle is cool. i raced this one kid and hes like "yo is that turbo" after telling him no 2 times. hes like " nah man i think you got turbo and just dont know it. and speeds off. I never really cleaned the filter, i usually just buy new ones. waste of $ but im lazy like that. i never heard it banging around. actually it was really soild under the hood! sux i guess