440 big bore kit?

[matthoyda]

will a 440 big bore kit increase power alot if that is all you do to the quad? No exhaust or any of those goodies? or are those also needed?

[beaker1214]

It would probably make a difference but I would definently invest into a exhaust system and rejet it to get it breathing better.

[DOHC]

yea i got one with the 440 kit, k&n filter, jet kit, white bros e series slip on and compared to my friends 05 400ex theres a big dif, but i dont think u need to but when u are burning more fuel and breathin more air i would my advice would be to get a jet kit, k&n filter and a slip on