This head is designed to give a mild boost in performance and as an alternative to hard to find glow original heads. It works with just one gasket/shim for normal sport applications.
Our Turbo heads accept “Turbo” style taper seat glow plugs to optimize combustion chamber shape. Plug is not included and are available in a wide selection of heat range for tuning. Suitable plugs for the G-Mark .03 with throttle are OS RP5, RP6 (formerly P5, P6) and other makes in the hot to medium hot range.
Standard 1/4″-32 plugs are not compatible!
Made in the USA!