Mishimoto Silicone 90 Deg Reducer Coupler 3.5in To 4in Black

Mishimoto Silicone 90 Deg Reducer Coupler 3.5in To 4in Black provides a 90-degree transition between 3.5" and 4" hoses, delivering a reliable, flexible join that simplifies routing for coolant and air passage systems.

Designed as part of the expansive Mishimoto silicone coupler line, this reducer coupler is intended for installations where a 90-degree change of direction and a diameter step are required. Use in coolant or intake/charge piping preserves routing options while maintaining system integrity.

Key features and functional benefits

• 90-degree transition — Enables directional changes in tight engine-bay layouts without sharp kinks, improving hose routing and reducing stress points.
• Reducer from 3.5" to 4" — Provides a controlled step in diameter for connecting mismatched hoses or piping, simplifying integration of differing system components.
• Silicone construction — Silicone material offers flexibility and vibration damping, accommodating movement between components and helping maintain seal integrity under dynamic conditions.
• Black finish — Neutral appearance for clean installation and compatibility with OEM and aftermarket engine-bay components.
• Applicable for coolant and air passage systems — Versatile use across charge piping, intake plumbing, and coolant lines where a silicone coupler is appropriate.
• Mishimoto brand — Part of Mishimoto’s expansive silicone coupler range, providing consistent sizing and compatibility within the brand’s lineup.

This coupler is intended for technicians and installers who require a dependable silicone transition piece that addresses both routing and diameter compatibility without introducing additional complexity. Its role is to provide a straightforward, flexible connection between 3.5" and 4" lines at a 90-degree angle while fitting within Mishimoto’s broader system of silicone components.