These kits were actually tub cars. They use a plastic tub like the TA01 - TA04 with the suspension bolted off of them. The actual Tamiya pancar was the F103LM version. This was basically the F103 F1 chassis. They made a Hop-up carbon chassis that had a wider platform. The F103LM kits were in three versions. Porsche 911 GT-1 "Mobil-1", the Toyota TS020, and the Audi R8 all circa 1998.