The LFA chassis consists of three main pieces: a Carbon Fiber Reinforced Plastic (CFRP) center tub, and aluminum alloy subframes extending forward and back. Toyota relied on its own extensive textile weaving heritage and expertise to help construct the carbon-fiber tub. Labor-intensive resin-impregnated carbon-fiber sheets are hand laid to form the exceptionally stiff and strong cabin structure. Resin Transfer Molding (RTM), where preformed carbon fiber is impregnated with resin, is used for the floor, transmission tun nel and hood. Sheet Molding Compound (C-SMC), where short-fiber carbon-fiber material is hot-pressed into a die, is used for the C-pillars and the rear floor. In total, CFRP accounts for 65 percent of the weight of the LFA's body-in-white, with aluminum alloys representing the remaining 35 percent. With the CFRP, Toyota estimates it's about 220 lb. lighter than an all-aluminum structure. page 2 - Technical Analysis: 2011 Lexus LFA - Driving Impressions - RoadandTrack.com