These S&S Short Block assemblies include a crankcase with pre-installed flywheel assembly, cylinder studs and bearings. Features stock 3 1/2" bore and 4 1/4" stroke as in all 80CI (1340cc) Evolution engines. Available for 1984-1991 or 1992-1999 Natural Aluminum or Wrinkle Black finish. Includes Certificate of Origin for new crankcases. Note: When rebuilding a 1990-1999 engine or building from scratch, you will also need to order a Pinion Shaft Conversion Kit, ZPN 762591.