Designed for modified engines with a greater demand for fuel. Necessary when replacing the injectors with larger ones. Allows easy installation of N2O and fuel pressure regulator Material: 6061T6 billet aluminum Fits K20 / K20A / K20A2 / K20A3 / K20Z1 engines Designed for modified engines with higher fuel demand Necessary when replacing injectors with larger ones Enables easy installation of N2O and pressure regulator fuel Material: 6061T6 billet aluminum Suitable for engines: K20 / K20A / K20A2 / K20A3 / K20Z1