how much is a k&n filter for a trailblazer 400??????? does anyone know and how many more mph does it give if my quad stock goes 68????????????????

 

it's a question people just keep looking at it but don't answer cmon yo answer my question please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

 

Dont know the exact answers but cost 30-40 and doubt any hp gains.Just a guess

 

the k&n air filter is good thing,the biggest gains came from if you're not intended to muds is to take off the whole airbox and put a k&n filtercharger,but this mod apply especially on piped engine.
will not add any more speed but broader powerband and response,add some top end tough....