The SIR rods are an I-beam design that are bushed for floating pins and are held together with ARP cap screws and are rated for 500HP. I got mine from Mancini Racing for $219.00.
I was going to have my stock rods reconditioned and have ARP bolts installed but the machine shop doing my work suggested that I check out the SIR rod as an alternative that I could save a few bucks on.