SPEC REAR WHEEL HORSEPOWER is the estimated power for the selected RPM, fuel, and exhaust lambda at optimum spark advance.

MAXIMUM REAR WHEEL HORSEPOWER is the estimated power at optimum exhaust lambda and spark advance and is based on the flow capability of the complete system and the energy content of the fuel. This represents the capability of the system under ideal conditions

These values have been validated on our in-house Mainline hub dyno, and are provided as a guide, not a guarantee that your vehicle will make that much power! They do not account for deficiencies in the system like airflow limitations, poor tuning, inefficient intercoolers, etc.

The critical values are injector duty cycle and pump utilization which are based on tests performed on stock, Yawpower, and Injector Dynamics pumps and regulators. Component choice is based on the performance of these parts at a threshold of 90% at 12 volts which provides a substantial safety margin.

The result is a complete fuel system that you can trust to provide sufficient fuel flow for YOUR vehicle. No more internet experts, no more mismatched parts, and no more melted pistons!