ones been tweaked by mines rev limit raised air/ fuel/ ign tweaked etc etc and i think maybe speed limiter gone but could be wrong on that one and the other hasn't and is std, mines ones cant be opened up and be chipped as the chip is glued in where as the std one isnt glued in and can be replaced and re wrote which is the better option if you plan on more power than 330bhpish
mines units should have a rev limit set but there were around 200 faulty units made with no rev limit, this is not good if you have one of those lol
theres been more than one engine gone bang through 9k above rpm.
if you get a goodun there a very good bit of kit for the money.
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