SpeedFactory Radiator Filler Neck - D16 w/ -16an Outlet - SF-06-060 Solenoid Block Off Provides proper valve lubrication and

Provides proper valve lubrication and minimizes valve guide wear while keeping oil out of the combustion chambers resulting in improved engine efficiency and performance under all conditions including the high rpm and extreme heat levels generated by today's high-performance builds

Heat Shielding on Crankcase Breather and Oil Return Lines

Includes larger air duct designed to provide optimal airflow to the Mishimoto intercooler core

All Hybrid Racing cables are manufactured and assembled in the USA

8 BP99-00 Mazda MX-5 Miata 1

SpeedFactory Radiator Filler Neck - D16 w/ -16an Outlet - SF-06-060 Solenoid Block Off Provides proper valve lubrication andWhether you have a custom radiator or a SpeedFactory Race Tucked radiator, you need a proper way to fill your engine's cooling system from the highest point and we have the solution. SpeedFactory Racing D Series Upper Coolant Fill Necks are compatible with most aftermarket radiator setups, and change the high point of your cooling system for easy filling and system air bleeding. Our necks are manufactured in house using high quality aluminum materials