The ATF RB20 & RB25 to GM Transmission adapter plate kit is made from ½ inch 6061 T-6 heat-treated aluminum.
Uses RB25 Starter with a 9 tooth gear.
Napa Starter is RAY 2444514O'reillys Starter is 16210Autozone Starter is Duralast Starter 16210
Includes:• Adapter plate• Crank adapter• SFI Approved Flexplate• All the necessary mounting hardware to correspond with your engine• Kit requires Small Bolt Pattern, Stock Height GM Converter