SIERRA 4 Inch EPDM Exhaust Flapper Valve with Clamp – 18-4457

Description

SIERRA 4 Inch EPDM Exhaust Flapper Valve with Clamp – 18-4457

Sierra 18-4457 is a exhaust flapper valve with clamp for Marine exhaust outlets requiring a 4-inch (101.6 mm) outside flapper valve, including MerCruiser 12644-series applications.

• UV-stabilized EPDM flapper helps limit water backflow into the exhaust system.
• Supplied with a stainless-steel clamp for a 4-inch outside exhaust tip.
• Cross-references MerCruiser 12644A1 / 12644Q01, GLM 89250 and Mallory 9-44001.
• Designed as a direct marine-service replacement where the listed Sierra/OEM reference is specified.
• Compare the original part number, dimensions and assembly configuration before installation.

Fitment for marine engine and drive service parts can vary by model, serial number, drive/gearcase, cooling configuration and prior OEM supersessions. Compare the original OEM number and physical configuration before installation, and follow the applicable manufacturer service procedure and torque specifications.

Specifications

• Manufacturer: Sierra
• Part Number: 18-4457
• Part Type: Exhaust flapper valve with clamp
• Application: Marine exhaust outlets requiring a 4-inch (101.6 mm) outside flapper valve, including MerCruiser 12644-series applications.
• Nominal Outlet: 4 in (101.6 mm)
• Flapper Material: UV-stabilized EPDM
• Clamp: Stainless steel

Interchange / OEM References

• MerCruiser: 12644A1, 12644Q01
• GLM: 89250
• Mallory: 9-44001