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Crower 403 cams have alot of overlap. I dont think they would be any good on boost. Generally all motor (high compression, high overlap cams) does not do well when u boost them. Its one or the other. Personally if I were to boost it, dont put the crower 403's in. If u want to chance it then u definately will need cam gears and "TRY", and I do mean try to tune the overlap out enough to make power.
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