Complete engine RC/CY gasket set. Includes 2 heavy-duty exhaust gaskets! This is great addition to any engine but a must for any high compression engine. Avoid those pesky blowouts with super heavy-duty gasket set manufactured from flexible graphite and bonded to a stainless steel insert. Flexible graphite can withstand extreme temps and has superior sealing abilities; combined with a stainless steel insert, this gasket can hold up to the most extreme pressures. The material comprises two outer layers of graphite foil with a central stainless steel core. These gaskets are designed to withstand up to 1,200 degrees Fahrenheit (650 Celsius), measure 1/64 (.020") inch thich (0.5mm), and have a crush rating of 40%, allowing them to easily seal gaps.  Fits Zenoah G240RC/G270 engines. Fits Chung Yang F270.