Since 1989, the Honda Civic SI Hatchback has continued to embrace the image of an underdog in the automotive tuning scene. The DOHC B16 engine in the 1989 Honda Civic EF turned a standard economy compact car into a nimble race machine. The trend continues in newer models with engines such as the B16 Type R and the K-series. Each engine is placed in a formidable chassis that utilizes double wishbone suspension components, Macpherson struts, and limited slip differentials. The engines range in power from 160 to 205 crank horsepower. Since 1989, each SI uses a VTEC variation. The Early B16 uses a standard three stage VTEC setup, which has two three-lobed cams that open the valves of the head at VTEC engagement range to increase the power output. Newer models use the I-VTEC system. The I-VTEC system uses aggressive cam profiles to increase the high engine output and a VTS system with a self-adjusting cam that allows the engine to optimize valve overlap throughout the RPM ranges. There is a large inventory of complete Honda Civic SI Hatchbacks and car parts available on eBay.