Chief Automotive Technologies Thunderbolt specs include comprehensive frame and upper body measurements for thousands of cars and trucks, offering collision repair shops a single, easy-to-use resource for accurate repairs. Thunderbolt specs include measurements for window and door openings, tailgates, hoods, engine compartments, trunks and rear hatches, body openings and body widths. Pre-release vehicle data is added continually and updated daily for those who order the online version. At data resource centers across the globe, Chief personnel measure vehicles themselves with the frames anchored and the suspensions unloaded in order to provide technicians with “real-world” data. The specs cover most models dating back to 1990, with select vehicles from the 1970s and 1980s. Thunderbolt specs are available on CD or online with monthly or annual subscription options.