What makes the RSH model unique among Carrera RSs is its specification, or rather, lack thereof. It is approximately 30kg lighter than the 471 RS 'Lightweight' and 130kg lighter than the 472 RSL 'Touring'. It was not easy for Porsche to register the RS for the road. The German government required dealers to fill out two order forms, the first for homologation and the second to convert the car. After an RSH was built stripped of most of it's trim, it was taken to the scales to meet the 960kg weight requirement for homologation. It was then brought back to the factory for conversion to 471 or 472 spec, which mostly involved reinstalling the trim that was removed. Changes almost every other week occurred from the beginning to the end of production but there are similarities between unconverted RSH models to distinguish them from the 471 and 472 models; deletion of door caps, no trunk carpet, 6 inch Fuchs on all four corners with 185/15 tubeless front tires & 215/60/15 tube rear tires (early cars used mostly Pirelli CN36s, later cars used a mixture of Dunlops and Pirellis), deletion of the glove box door, removal of passenger seat, both sunvisors, coat hooks, trunk carpet, compressor, tools and hood shocks. There was a wooden steering box cover. Not all of these items were deleted or changed on every RSH so they can not be considered standard across all 17 cars. For example, Chassis 1470 has the glove box door, drivers sunvisor and trunk shocks installed. Since Porsche had fulfilled its homologation requirement after 1000 cars were built, they slowly began incorporating production parts to substitute for the lighter weight items across all models, RS, RSL and RSH. Lighter .8mm body panels were swapped to production spec .88mm panels, Thinner 3-3.5mm Glaverbel glass was changed to 4-5mm Sigla production glass, Ducktail spoiler construction switched from aluminum/fiberglass to steel/fiberglass, the hood badge on the RS and RSH was swapped from a decal to a metal badge, and the rubber hood and trunk catches on RS and RSH were swapped for production internal release cables and metal latches. Some late RS 471s are known to have pop out rear quarter windows and metal bumpers the same as their heavier RSL 472 counterparts. Chassis 1470 is obviously a later build car and most these details are present and correct.

The RSH model continued to be ordered even after the requisite 1000 cars had been built to satisfy homologation rules; Starting with chassis #19 and continuing periodically until chassis #1555, 17 customers decided to leave their RSH unconverted in order to go racing or possibly lock them away forever (!). One idea posited for why RSHs continued to be built after the requirements for racing were satisfied is so new parts could be homologated for production. The build date of this car coincides with the introduction of the modified rear trailing arm mounts. The last RSH built also seems to coincide with the introduction of alloy engine cases later seen on the RS 3.0.