3.5" to 4" Straight Reducer Silicone Coupler Black Stop Some seats might rub against

Some seats might rub against certain panels depending on the car these are purchased for

Increases engine performance & cooling efficiency by 35-45% heat radiation

Easy to install

5 Bar) of boost pressure can significantly reduce a turbochargers lifespan

3.5" to 4" Straight Reducer Silicone Coupler Black Stop Some seats might rub against100% brand new items, never used or installed. JDM Sport 4" to 3. 5" straight reducer silicone coupler hose. Made by OEM approved manufacturers with materials that meets or exceeds strict OEM requirements. 3 ply nylon reinforced silicone made to withstand high temperature and high boost applications. Universal application for connecting turbocharger, supercharger, forced induction, or intake piping. Works with any air intake, intercooler, or custom