Nexx Racing's Ball differential is a low cost, highly effective way to increase speed, handling, steering and tuneability to your race car. Featuring: High precision, stainless steel axle, Delrin Spur gear, ceramic balls. NX-152 Highly polished, High precision pressure plates, are the heart of this incredible high performance differential, light weight center components, center spur carrier bearing and beautiful GOLD anodized parts. Available in (MM) and (LM)* versions. *4mm longer for LM chassis.