guy in canada now has the highest numbers out of any GM aluminum 3.1 liter and the block is bone stock 135k stock bearings. car got dynoed 2 days ago, 396whp and 473wtq on 11 psi with a modified holset hx35, maxed out 50# injectors at 11 psi. :yas!! 1/4 mile #s will be coming soon as well.