An electric drive-by-wire steering system, with improved response and more natural feel, guides the 2006 Honda Civic Si’s front wheels. Standard tires are P215/45R17 Michelin Pilot HX MXM4 all-season treads, with same-sized Michelin Pilot Exalto PE2 performance tires available as an option. Keeping the 2006 Honda Civic Si glued to the ground is a MacPherson strut front and double wishbone rear suspension, fortified by a 28mm front and 17mm rear stabilizer bar, boosted spring rates, and less compliant dampers for a roll stiffness improvement of 30 percent. A capable four-wheel, vented-front, solid-rear, antilock disc braking system brings the Civic Si to a stop – thanks in part to front discs that are more than an inch larger than last year.