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ptp used to do a 180ps performance kit for the ZR that comprised of a full janspeed exhaust and itg maxogen intake, a bit optomistic quoting 180 ps.
A chap on xpowerforums fitted these mods to his ZR vvc 143 and afterwards it made 158 so it gained 15bhp....so a 158 model would make 173 ish.
However with your exhaust cam and the remap, i reckon you will make 180 comfortably, maybe even a 190 badge wouldn't be too optomistic seeing as the zt190 only made 187 bhp.
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