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First off-please turn off the caps.That is interpreted as yelling.Edelbrock does build a good product.But to make a blanket statement like that isn't accurate.How did your street engine builder come...

Just one more comment.If it where a matter of a compression ratio that dictates much about cam choices,spring pressures needed because of that cam choice, correct intake runner sizes,exhaust system...

Really not in for a long debate here.Builds do and should be about a tailor built engine considering expectations and the parts combined together."Significant" gains or not relate to that.Application...

Nope,we are talking about roller rockers alone,eh??.

At the end of the day,I don't think roller rockers on a street vehicle means a whole heck of alot.