ISR Performance Silicone Coupler - 4.00" 90 Degree - Black vendor_Cusco Ductile material is used for

Ductile material is used for all pressure plates and high burst strength can be achieved in all temperature ranges

A unique "donut dish" crown and application-specific under crown profile properly redistributes heat and reduces stress concentrations experienced in high horsepower Subaru engines

Fuel Injector O-Rings

Retains factory MAF sensor (no modification required)

ISR Performance Silicone Coupler - 4.00" 90 Degree - Black vendor_Cusco Ductile material is used forPart #: IS 90400 Silicone Coupler 4. 00" 90 Degree Black ** All ISR Performance Products are Designed for Off Road Use Only ** Note: ISR orders might take a day of processing. If you need it sooner, contact us directly.