gains, no... its not like youll see a hp increase or anything... odb1 jus responds to modifications better... for example with odb2 you might throw more codes after modding than you would with odbI. that's pretty much the reason for the swap. with odb1 you wont have to reset your ecu as much for your mods to be "accepted" by the car. the ecus are swapable, its jus a matter of taking one out and putting one in...but youll have to change your wiring harness. i think skunk2 makes em, not sure on that tho.... one issue: ive heard that the older ecus(odb1) are quite larger than the new ones, so before pulling everything out youll want to make sure the new one will even fit by asking someone whos also done the swap.
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