Road King Owners Manual Air Suspension - Sep 12, 2014 · Welcome to the Official Bushtracker Owners Forum. The Bushtracker Owners Forum is dedicated to providing a continual resource of hints, tips, bush fixes and discussion for current and future Bushtracker caravan owners. We trust you enjoy this resource and we welcome your feedback and postings on this site in the best interests of Bushtracker caravan owners.. Chassis and body. The McLaren F1 was the first production road car to use a complete carbon fibre reinforced polymer (CFRP) monocoque chassis structure. Aluminium and magnesium were used for attachment points for the suspension system, inserted directly into the CFRP..