Mishimoto Silicone Transition Coupler 3.5in to 4in

Mishimoto Silicone Transition Coupler 3.5in to 4in Universal high-performance silicone coupler designed to join 3.5" to 4" intake, intercooler, or radiator piping. Built for strength, flexibility, and long-term heat and pressure resistance. Perfect fit: Smooth internal bore and tapered design ensure leak-free joins between 3.5" and 4" pipes. Durable construction: Multi-layer silicone with embedded reinforcement resists bursting, kinking, and abrasion under boost and high temperatures. Performance colors: Available in black, blue, and red for OEM-matching or custom engine-bay styling. Vehicle applications: Ideal for turbocharged and supercharged systems, cold-air intakes, intercoolers, and coolant lines. Easy installation: Flexible yet firm — clamps (sold separately) secure quickly for a professional seal. Choose Mishimoto reliability for a clean-looking, high-strength connection that performs on the street or track. Compatible with standard 3.5" and 4" piping and backed by Mishimoto quality standards.