Ok instead of getting the F7 exhaust for almost $340.00 my friend is parting out his blaster and is selling his bills pipe to me for $50.00. I went on bills pipes website and it said use 270 main jet and 1 size up from stock for pilot jet? Is this correct? Also, is a hex jet and a main jet the same? im asking cause im buying all the stuff off of vitos performance and they only have pilot jets and "hex" jets. please reply asap