Application: For gasoline engine cylinder with M14 or M12 spark plug, applicable to most LS engines, gasoline engines, automobiles, trucks, ships, motorcycles, ATV, UTV, etc Package Included: 1 x Engine Air Valve Holder Pressure Pipe Note: The spark plug must be removed before installing this tool and is not applicable to the detection of diesel engine Application: For gasoline engine cylinder with M14 or M12 spark plug, applicable to most LS engines, gasoline engines, automobiles, trucks, ships, motorcycles, ATV, UTV, etc No Disassembly: Cylinder pressurising tool with surface removal allows quick detection of exhaust valve, intake valve and piston ring leaks and replacement of valve oil seals without disassembling the cylinder head Use Steps: Firstly, remove the engine cylinder spark plug; Secondly, connect the purchased test tool; Thirdly, connect the gas pipe; Lastly, determine the fault point according to the gas flow Features: With universal spark plug (nozzle) connector, size 12mm-14mm; copper control valve at the connection with the gas pipe, easy to control the gas inlet and outlet; hose part is pressure-resistant, bending-resistant and enduring Package Included: 1 x Engine Air Valve Holder Pressure Pipe. Note: The spark plug must be removed before installing this tool and is not applicable to the detection of diesel engine