When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Mine were put in when I did my heads/cam etc so I can't say, but Roger Vinci designed these with crane and put them in my car and others and has averaged in the 14rwhp range basically because it gives your cam more lift and reduces friction, I have read claims of 10 to 18rwhp and a recent post the guy put them on a basically stock car and got 10rwhp pretty much throughout the range, I would be interested in this also I am going to deff put them on my stroker motor but I may have to go to the 1.7 as my cam will already be a little over 600 lift and there may be clearance problems.
If you decide to install a cam down the road do the rockers have to be removed? :flag
No. Maybe if the lift of the new rocker isnt factored into the specs of the new cam, but if it is, NO.
I had my heads ported lightly and got a valve job. Better springs and retainers and pushrods too. I have a stock cam. I also raised the limiter 300 more rpms. I gained approx 40-60 hp from this. I went from 13.0 @ 111 to 12.60s @ 117.7
mph on Runflats. :flag