Unique bottom design allows seat to be mounted in multiple layback angles without raising center of gravity in the race car. Seat comes with bolt on rib braces and a welded interior head rest plate for additional strength. Constructed from TIG and MIG welded .100" thick 5052 grade alum. Front of seat raised for leg and thigh support. Seat comes std with lap belt openings, double shoulder belt openings and sub belt opening to accommodate all belt systems. Molded rubber inserts for all seat belt openings.