hi , im a new owner and i d like to buy some performance heads, preferably the 21cc and im not sure witch brand is the best buy , my banshee is pretty stock except for the bolts-on like t5 mufler, boost bottle , air filter and jets , so id like to have my power band start a little lower RPM . Most of my riding is trails and little bit of pave roads . And also thinking of buying the adjustable timing plate to. And i want some a-arm widening kit and i dont know witch brand is good quality , and when they whrite +3 +1 is it +3 inch each side and lowers the front of the bike 1 inch ? So this would be my banshee make over before summer.