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ha all , i am after some advice , i am changeing my engine in me cossie , the thing is the engine i am putting in is a 4x4 engine on standard compression,where as the 2wd lump that just come out was a low comp , also i am changeing the exhaust houseing of a t34 from a .48 to .64 well its a .6 something, any way the chip is set for greys 500 intercooler will i need a new chip, im thinking the anser is yes but wanna check, Gary