The 2JZ engine has an iron block because it was designed to be turbocharged, and thus the engine block needed to be strong to withstand the stresses of forced induction.
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navig. extra weight?
I remember reading this earlier from a post... does the navagation unit add that much extra wait to effect speed? how much is it?someone had said taht people are adding extra stuff to the IS and blaming them for their IS lacking speed...
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