Manthey Racing Handling Kit for the Porsche 718 GT4 RS Costs $54,000

If you want more from your Porsche 718 Cayman GT4 RS, you'll have to turn to Manthey Racing. The Nürburgring-based shop, a Porsche subsidiary, runs race cars, but also does development work on its road cars. Porsche confirmed Friday that the Manthey Racing handling kit for the 718 Cayman GT4 RS is coming to the U.S. And it won't be cheap.