Mishimoto MMCP-27530BK black silicone transition coupler measures 2.75in to 3in, rated to 330°F, coolant compatible, ideal for custom air intake system piping.
Mishimoto MMCP-3540BK is a 3.5in to 4in black silicone transition coupler for air intake and piping systems. 100% silicone, rated to 330°F, coolant compatible.