I priced a complete set of GEN-IV factory rockers for use on a set of bare GEN-IV heads...and then contacted T&D regarding their GEN-IV assemblies. All I can say is not in my budget.
I would also ask if there is any performance gain with them...I would call Dan Cragin, he knows about all Viper performance products. I think if there was a gain to be made, he would have told us about that when he developed his ported heads.
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