1986-1997 Chevrolet Small block externally balanced engines, 153 tooth.As performance levels increase, an O. E. style flexplate just won't cut it and a stronger option is a necessity to prevent transmission and or converter failure. B&M has you covered with our high performance flexplate designed for 1986 1997 small block Chevy V8 engines (externally balanced) with one piece rear main seal. Features include high tensile strength steel construction to resist elongation and cracking, 10. 75 inch bolt pattern, 153 tooth