Our Horn Intake Gasket (Horn Intake Gasket (993163)) is made from AFM Material, a high-performance gasket designed for Mercury Racing 2.5L EFI offshore outboards, including 260 EFI, 280 ROS, 300 Drag, S3000, F1, and Offshore models.
 
Made from AFM (Asbestos-Free Material), it ensures superior sealing, resisting fuel, oil, and extreme temperatures while maintaining a secure fit under demanding conditions.
 
Designed to meet or exceed Mercury OEM 993163 specifications, this gasket provides a precision fit to prevent vacuum leaks and optimize engine performance. It is ideal for high-revving racing applications such as drag racing, offshore racing, and Formula 1 boat competitions.
 
Compatible with multiple Mercury Racing 2.5L EFI models, including the 260 EFI for high RPM performance, 280 ROS (Race Offshore Series) for offshore racing, 300 Drag for drag racing, S3000 and F1 for competition use, and Offshore EFI models built for durability in extreme conditions.
 
This gasket replaces part numbers: 10-2703, 510-46, 99316, 993161, 993162, and 993163 (Manufacturer Item). Compared to traditional paper gaskets, the AFM material minimizes vacuum leaks, ensuring consistent engine performance.
 
For proper installation, clean mating surfaces, follow manufacturer torque specifications, and inspect for leaks post-installation.
 
Available through Buckshot Racing #77, the Horn Intake Gasket 993163 is an essential upgrade for Mercury Racing 2.5L EFI outboards, delivering superior durability and reliability.
 
For further information or to discuss the best option for your engine, contact Mike at +1-714-697-1716 or email mike@buckshotracing77.com