Overview Reviews Product Description Ring and Pinion - Pro Gear - 4.56 Ratio - 30 Spline Pinion - 4 Series - 8.875 in - GM 12-Bolt - Kit Product Videos Custom Field Product Reviews Write a Review Write a Review × RICHMOND 4.56 12 Bolt GM Pass Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *