The Mercruiser GM 4.3L Block Timing Chain Cover Plastic Vortec with Bolts # 12554557 is a high-quality boat part made by GM in the United States. Specifically designed for the GM 4.3L engine, this timing chain cover is a durable and reliable component that ensures optimal performance and protection for your boat. With the included bolts for easy installation, this product is a crucial part for maintaining the engine of your boat in top condition.