SD: sintered Off-Road. Good efficiency and stability under all operating conditions. Suitably resistant to wear, even when exposed to water and mud. Less aggressive than the SX, giving more flexible control."
"6154
Reduces all the spring stess and scrub wit ha extremely high grade bearing. no more need for plastic washer, Improves backshift, Imporves cinsistency in performance, Full stainless bearing. (Works on all 2008 Ski-doo...