jus wodered what sort of stuff i would need to do to change my tdo4 to a tdo5 turbo on a 95 wrx wagon

 

take it off, put the new'un on

seriously, im not sure due to the differences in the turbo, i wouldnt suggest putting it on and driving it on boost, you "may" have to find a suitable ECU with a TD05 map on it in order for it to work properly, there should bea few kicking about like the one you found on ebay the other day....the problem being is that if its not for the exactl spec that the ecu was designed for then your almost inviting a certain amount of trouble...