Bolt (M10-111 Gr10.9), Crankshaft Main Bearing Cap, for 90~95 ZR-1 LT5. Sold individually.  Application as follows;

• 90~92 model, 375 Hp engine: Four (4) bolts are required per engine
• 93~95 model, 405 Hp engine: Ten (10) bolts are required per engine. (Inboard, closest to crank)

NOTE: This is a USED, GM OEM part.