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the 01 tib has the BetaI while the 03 tib has the Beta II.
same engine block, but the beta II has a different head, and is MAP based. in the betaII head, hyundai stuck in CVVT(works like vtec, butin a different way). it is mainly only used for emissions purposes though, and only gives a little more torque at low rpms. maybe hyundai will decide to use it for increased power though some day down the road.
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