Super661 HD Muncie Main Case kit

The Super661 HD Muncie main case replaces  any Muncie 1 inch style main case and is also a direct replacement for Autogear Supercases. The Super661 S-661 case kit comes with a new designed sealed front bearing, Redline gaskets, countershaft stabilzer plug, bronze thrust washers, mounting hardware,  extended fit countershaft and Zero-Leak fill and magnetic drain plugs. CNC precision quality machined case with extra thick mounting ears. Replaces GM case 3885010, 3925660 and 3925661.  Use our billet aluminum or nodular iron midplate, part # 16-6020A or 16-6020  to complete your ultimate Muncie case upgrade. Case has provisions for vents as well as oil cooler lines.

• Low gas pressure\ casting yields higher density and uniform wall thickness
• All cases are X-ray inspected to check for voids, cracks and porosity
• Provisions for oil pump return
• Provisions for a case vent
• Machined for thru venting into tailhousing ( using our midplates)
• Smooth internal contours and surface to reduce parasitic drag
• Internal case contours desgned to keep  more oil up front
• Dual side cover dowel pin locations ( use with our billet sidecover )
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