 One noticeable element of the IS F design were its faux quad exhaust tailpipes consisting of two vertically stacked exhaust tips on each side that did not directly connect to the actual exhaust pipes ( tips were part of the bumper, rather than the exhaust).The interior features a four-passenger cabin with braided aluminum panels, steering wheel paddle shifters, and F marque emblems.The IS F also features different seating, with bucket seats in front and rear.