Which Engine internal's are the best way to go for 390 to 400whp?

 

well if u are going boosted, pistons and rods are the only things included on the cybernation stage 2. that kit is good for 400+ whp

 

I wanna use the Hondata for the K series as well, but will it be ok to use the Stock head and cams?

 

i don't even think there have been forced induction cams released for the k-motors yet. i know wha u mean i would want to upgrade everything i could to be able to handle that kind of power without problems later on.