i know for the new edges mac and flowtech make LTs for automatics, dunno if that will fit our cars...
if u have that much money right now, why dont u just buy a vortec S trim? technically as long as ur running at a low PSI u dont have to kill urself about getting a tune the next day after throwing on the KB...
what exactly is ur goal for ur car?
light to light - KB wins
highway and track - most would say centrifigual
yet it all depends... no matter what if ur sticking with your car ide say go PI, everything will help...
the 2.1L does not come with an intercooler or aftercooler as KB is teh GAYNESS with our cars lol...
once this is on and you have ur tune.. u said u have 4.10s right? get LTs, stall converter if ur staying with an automatic, get sub frame connectors(MM is the best pretty much, specailly with price), lowering springs(also new shocks struts later on), panhard bar to keep ur wheels on the ground, could get a rear strut bar, Cobra brake kit(dont worry about this right away).. ur gunna want new spark plugs and new wires(FRPP).. ide say u already have an intake.. so get a new MAF and TB....
right away ide just start on suspension to make sure my power was gettin to the ground and for better control of the car with that power... the rest will come along slowly..