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Anytime you increase the power in your vehicle, proper fuel delivery is very important as well. Not just fuel pump or injectors. A fuel rails are also very important factor ,but something you should overlook. The factory system runs the fuel 'in series' which tends to cause certain cylinders to obtain less fuel. In higher boost applications, these cylinders can lean out dangerously causing the motor to fail. Instead, aftermarket companies like Perrin & Agency Power have come up with 'equal length' systems that run to each fuel rail ensuring proper fuel distribution. This means: equal fuel delivery to all cylinders, more consistant AFR's and more power!