thanks for that info f6 ute. I currently have the hybrid I/c with plazmaman plumbing.do you think the bottom end will handle 360-380rwkw? cause my tuner/installer told me im nearly on the edge with my current power,so that's why I wanted to put a new bottom end. I have 320rwkw at the moment with the above plus 42pound drilled injectors,powerstat,k&n,3.5"dump,3.5"metal cat,and remus cat back system,ultra shocks f&r, with custom tune running 17pounds down low and tapering down to 12pounds.