Fits: OFNA Dirt Oval FEATURES: This Front Full One-Way Assembly is CNC machined from 7075 aircraft grade aluminum. This aluminum one-way is approx. 34 grams lighter then the stock differential which meens less rotating mass. This spool-type front full one-way increases handling and speed control during turns. Easy drop-in design comes completely assembled and is ready to install. INCLUDES: (1) Aluminum Housing (1) OFNA 31010 HD Steel Gear (4) 13X19X4 bearings (2 spares) (2) HF0612 One-way Bearings (4) M3 X 5M LHSHCS (2) Complete Outdrives SPECS. Material: 7075 Aircraft Billet Aluminum Weight: Complete assembly 88 grams Stock Complete Differential Assembly 122.4 grams