CHEVY V6 90-DEG MAIN BOLT KIT Replacement Timing Cover Hardware Kits The Sierra Marine 18-3683 is

The Sierra Marine 18-3683 is a precision thermostat or thermostat housing engineered for accurate engine temperature regulation

The Atlas frame accepts most standard sliders and brackets

T-bolt clamps provide even clamping force without cutting into the silicone

Keep your Ford 8

CHEVY V6 90-DEG MAIN BOLT KIT Replacement Timing Cover Hardware Kits The Sierra Marine 18-3683 isThe CHEVY V6 90 DEG MAIN BOLT KIT reinforces the engine's lower end by providing consistent, repeatable main bearing cap clamping. These main bolts prevent cap walk and main bearing bore distortion at elevated RPM where factory fasteners may allow crankshaft deflection and bearing clearance changes. Part 53058 is configured for its specific application with attention to fitment requirements. ARP main bolts are machined from 8740 chromoly steel, heat