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i just installed the nightfury camshaft along with btr .660 dual springs with titanium retainers, btr 7.400 pushrods, melling oil pump, 3 bolt cam gear, iwis chain and LS2 chain guide. hasnt hurt my MPG and the cars my daily driver... drives amazing, huge difference in hp and chops very nicely! my vote is on the Nightfury!
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