Sierra 16-254-4121 Exoflex Marine Wet Exhaust & Cooling Water Hose 4-1/2" x 6.25'

The Sierra 16-254-4121 Exoflex Marine Hose is a heavy-duty, flexible exhaust and cooling water hose engineered for demanding marine engine applications. Measuring 4-1/2 inches in diameter by 6.25 feet in length, this hose is built to handle the rigors of wet exhaust systems and engine water circulation where flexibility and durability are critical.

Constructed with an EPDM outer cover and reinforced with synthetic plies and steel wire helices, the Exoflex hose resists collapse under vacuum while maintaining flexibility for routing around tight engine bay obstacles. The black corrugated exterior features tighter corrugation spacing to ensure optimal hose clamp seating and a secure, leak-free connection.

Key Features:

• Suitable for marine wet exhaust and engine cooling water delivery applications
• EPDM outer cover — black corrugated finish
• Reinforced with synthetic plies and internal steel wire helices to prevent collapse
• Tighter corrugations for optimized hose clamp placement
• Resistant to heat, salt water, ozone, and abrasion
• Operating temperature range: -22°F to 212°F, with peaks up to 239°F
• Meets SAE J2006 R2 standards
• Lloyd's Register approved

The Sierra Exoflex Series 254 hose is the trusted choice for professional marine technicians and boat owners alike, delivering reliable performance in saltwater and freshwater environments.