Inside the 2006 Honda Civic Si, new seats with stiff bolsters, special suede-like trim, sporty red stitching, and an “Si” logo embroidered onto the backrest do a terrific job of holding the driver in place during hard cornering. The driver’s seat features a manual height adjuster, and with the standard tilt and telescopic steering wheel, it’s easy to find a perfect driving position. Getting into the back seat from the passenger’s side is relatively easy, thanks to a tilt and slide front chair and a large door opening. But for larger adults, the Civic Si’s rear quarters should be used only for short distances.