The highly-engineered AAM Competition 350Z HR Fuel Return System is the essential upgrade for improving the reliability of the 350Z fuel system.
The AAM Competition HR Fuel Return System for the 07/08 350Z is a direct bolt-on kit that converts the current factory “return less” fuel system to a full return fuel system. With force induction 350Zs easily producing up to 500rwhp, this system is capable of supporting the demand for higher fuel pressure to efficiently run a car equipped with turbochargers.
The “return less” system in the 350Z offers minimal adjustment to the amount of fuel the engine can receive. This type of system is cheaper for the factory to manufacture and performs well in the factory environment, but is restrictive once the engine is producing over 380whp.
The limiting attributes of the factory return less system is that the factory fuel pressure regulator is installed in the fuel tank, does not allow fuel pressure adjustments and is incapable of holding consistent fuel pressure with most aftermarket fuel pumps. The factory fuel pressure regulator is also unable to add fuel pressure under boost.
The AAM Competition Fuel Return System removes the factory regulator's control of fuel pressure and replaces the control with a vacuum/boost sensitive adjustable fuel pressure regulator. This allows you to adjust both the level of base fuel pressure and increase fuel pressure under boost. This system is a must have for any forced induction supercharged or turbocharged vehicle and any big shot nitrous vehicles.