Hondata's s300 is a plug in module to the factory Honda Engine Computer (ECU) which vastly expands the capabilities of the factory ECU. Forced induction, datalogging, real time updating of parameters, engine protection are but a few of the s300 features. With the s300 you can make all tuning changes in real time. No need to visit a dealer or burn new chips like with the old s200. The s300 ECU features a standard Honda computer that has been modified with features and expanded capabilities for a Jackson Racing Supercharged car. Hundreds of hours of tuning have resulted in an ECU program that delivers the most horsepower and torque repeatably. Jackson Racing superchargers are known for their low end boost so Hondata included features such as VTEC engagement at 1 psi of boost at any RPM over 2500rpm to yield torque starting lower in the RPM range and a raised Rev Limit (adjustable to 11,000 RPM) to take advantage of the increased power. The Hondata ECU's timing and fuel maps have been optimized to handle 6psi to 12psi of boost without the need to reprogram. The s300 system includes full Datalogging capability and a 3 Step Rev Limiter. System includes s300 ECU, RC 440cc injectors, and injector clips. All you have to due is swap your ECU and Injectors and you are ready to go. It is that easy. Not CARB Exempt. DYNO's.