Wiseco pistons brian crower rods rsx k20 k20a k20z 86.5mm 12.331 included ring set 8650xx rod bolt 3/8 arp 2000 rod length 5.473 material k650m865ap 2618 alloy standard pin (included) s550. Although the name implies that the Sportsman is a 2nd tier part, the Brian Crower Sportsman Rod incorporates every feature of the premier BC625+ rod, only that the fasteners have been changed to the more economical, yet venerable ARP2000 bolt, rated to 220,000 p.