I have an 03 Raptor with a HMF slipon. I am about ready to start doing a little engine work to the raptor, and would like to go ahead and upgrade to a full system, along with a stage 1 hotcam. I have tried contacting HMF but no response in 3 days. I was wondering if you can just purchase the header without buying the full system. Their website doesn't mention anything about header seperately. My other question is, are the stock carbs adequate enough for a full system and a new cam, and maybe later on a bigger bore piston. Thanks