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Originally Posted by BDR561
Same view for a rocker girdle?
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No, but not every engine needs them. Even high performance ones and very rarely ever a motor that can be driven on the street (I have seen 900 HP motors work just fine with out them). But, if you feel so compelled, won't hurt anything either... except of course it can be a pain when you adjust the valves. Shaft is the latest trend for really high lifts and spring rates. Best thing you can do for your valve train is to make sure that the geometry is perfect and that all the components where designed to work together.