Originally posted by j200pruf
If you are talking about the JGTC car, it can't really be classified like that. They are all tube frame purpose built race cars.

NO JGTC cars have to start w/ factory chassis and get full cages added - they are NOT tube frame cars - iirc the have to retain stock floor, roof and (maybe) door panels, as well as stock suspension pick up points.

Originally posted by HardcoreRice
They are not tube frame but they do not need stock floor or suspension pick up points. Wane Gardener's old GT500 supra has horizontally mounted pushrod suspension, F1 style front and rear as do many of the other cars.

Originally posted by maxpesce
NO JGTC cars have to start w/ factory chassis and get full cages added - they are NOT tube frame cars - iirc the have to retain stock floor, roof and (maybe) door panels, as well as stock suspension pick up points.

Some of the biggest changes from previous years' regulations are in relation to chassis structure and layout. The new rules the car to be built utilizing a pipe-framed structure. Ahead of the front bulkhead and behind the rear bulkhead, the main frame can cut away and replaced by steel-tube framing. If the pipe-framed structure is adopted, the regulations require the chassis to be equipped with an impact absorbing structure for driver safety. As shown in the accompanying illustration, the front and rear ends of the NSX, which were originally aluminum framing, have been cut away and a steel-tube sub-frame substituted. Essentially, the introduction of pipe-frame rules has virtually opened the door to new suspension design, which had been prohibited to the point of maintaining original type and operating principles until last season.