An excellent set of rocker arms for a street engine for the money. I use a 440 aluminum head with 11.5:1 compression port with a Comp Cams .525 lift cam and these PRW 1.6 stainless steel roller rockers to get the lift past the mid .500 and they worked great. My cam is a Comp Cams hydraulic extreme cam and with a preload of 1/2 to 3/4 turn I never had to adjust it. I run down the street, but I run pretty hard from time to time. They were recommended to me by a seasoned drag/street tracer from the 80's as a good/reliable reel seesaw that lasts for the buck. I will always consider them a good roller seesaw when building a 500-600hp street engine.
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