i was wondering if anyone knows how much HP can i gain by replacing my intake with the Cobre intake, all the ads say they can handle 350 HP but what will i gain from it

 

Depending on what you do will depend on how much hp you get by changing over to the Cobra.
Pull off you're existing stockintake and then installing the Cobra, possibly 8-10 hp more would be my guess, unless you go bya SOTP feeling.