The rods in the 575 are manley h beam,fitted with arp 2000 bolts,they have pressed fit pins(not sure why they do it that way,i prefer bushed full floating).In used condition probably worth around 200-300,new from manley with upgraded bolts around 700-800,new from merc crazy price,I think merc racing is on crack on its pricing of hard engine parts,no one buys big engine parts from them,some of there pricing just plain stupid