418HP 5.9 Magnum

What spring/retainer package did you go with? That's some stout valve action and it looks like it rev's nicely to about 6k or so. J.Rob
Just our std. beehive pac spring. It actually went to 6500rpm, but I did not post that...it was done on power, but I like to make sure our hyd. roller stuff will make an over rev to some degree....:rolleyes: cause you know people will push the envelope :eek: