The SFC (Simple Fuel Controller) can be adjusted in 8 separate steps in 1000 rpm increments. The adjustment range is /- 30% in 1% increments. The resolution allows the user to fine tune the fuel curve. The fuel increases/decrease monitor displays the percentage of fuel enrichment every 100 rpm. Speed limiter can be removed using this unit. VTEC engagement can be adjusted in 100 rpm increments starting from 2000 rpm. The SFC-VTEC is the most effective and user friendly VTEC on the market. The Field Plug and Play harness allows any fuel controller (regardless of brand) to be installed on a vehicle without the need of splicing into the factory wiring harness. This harness allows the quick installation and removal of any fuel controller for those who are not willing to modify their factory wiring.