Silicone 90 Degree Reducer Angled Coupler 3in To 4in Red

Silicone 90 Degree Reducer Angled Coupler 3in to 4in provides a compact 90° transition between 3-inch and 4-inch passages, delivering reliable routing for coolant and air passage systems and reducing hard-line stress in confined installations.

Designed and distributed by Mishimoto, this coupler expands the company’s line of silicone couplers and 90-degree transition components for use where a durable, flexible junction is required.

Key technical features and functional benefits

• 3in to 4in reduction profile — Enables a controlled transition between different hose diameters without introducing sharp edges that can disturb flow or create weak points.
• 90-degree angled geometry — Allows tight routing around engine bay components and chassis structures, reducing the need for additional fittings that add complexity and potential leak paths.
• Silicone construction — Provides flexibility and resistance to common automotive fluids, supporting repeated installation cycles and absorbing vibration between rigid components.
• Red finish — Visual identification for system layout and maintenance; color-coding can simplify troubleshooting and assembly in multi-line installations.
• Mishimoto product lineage — Part of Mishimoto’s expanding silicone coupler range, offering consistent sizing and compatibility with like-for-like couplers from the same family.

This coupler is intended for use in both coolant and air passage systems where a 90-degree diameter change is required. Its construction and shape are focused on maintaining routing integrity and reducing mechanical stress at the connection point.

If you require multiple pieces or specific clamp hardware, verify contents and clamp selection before installation, as clamps are not included unless specified.