i blew my shee up yesterday......i just put brand new D&D pipes and cool heads on it...it had 55 pound of compression....it blew the right side up...i am running 280 mains and the needle droped one.....i think i need more then that..i am upstate NY and have no idea what altitude i'm at...i wanna say sea level.....but when i replace the pistions i was looking at the vitos super stock..it says 8 HP on top end....any1 notice a diffrence? worth the money? thanks