PEM Center Section - 5.29 Ratio - 31 Spline - Steel - Spool- Ford 9" YA0828MM15 437The COMP Cams philosophy has

437The COMP Cams philosophy has never changed: make the highest performing products possible and lead the industry in technological development

Unique three dimensional dial design gives added depth and style to your custom dash

Extremely versatile

Big Block Chevy / Buick V6

PEM Center Section - 5.29 Ratio - 31 Spline - Steel - Spool- Ford 9" YA0828MM15 437The COMP Cams philosophy hasProduct Description: Differential Case Assembled 5. 29 Ratio 31 Spline Steel Spool Natural Ford 9 in Sold Individually PEM Racing (Performance Engineering and Manufacturing) offers a wide selection of quick change gear sets, ring and pinion gears, differential cases, and other rear end components.