This is a replacement complete piston/sleeve/rod set for the RB Concept C5 and C6BB (1006-BB) engines. This includes not only the piston and sleeve, but also the connecting rod, wrist pin and wrist pin clips. In fact the rod is already pre-assembled for you, so you can simply install it in the engine and forget about the hassle of removing wrist pin clips to install a new rod!<br />