i think i go down this route for more power For more power, we'd recommend upgrading the injectors to 700cc items, fitting a larger fuel pump (280 litres per hour) and a Nismo fuel pressure regulator in combination with a pair of Nismo air flow meters (Rated for use up to 775 bhp). A cat replacement pipe is already included with this car, brand new & unused. These additional items combined would give a very responsive 500 - 550 bhp with these turbos.