wich one is better?

 

they are not comparable

 

I ordered a k&n from rockymountainatv and they sent me a Dynojet. I guess its the same? But ive had no trouble with the Dj, although some people yould rather die that use a Dj kit. I dont know why, but you would come out cheaper goung buy a few factory kehien? jets from a dealer then use that instead of a kit.

 

I believe K&N sells some type of power up kit with jets, and I believe the jets are dyno jets.