While Porsche may have developed the 718 Cayman GT4 RS as the most track-oriented variant of its mid-engined sports car, it could still be pushed further. Germany’s Manthey-Racing certainly thinks so, unveiling their latest kit for the RS, boasting significant on-track performance gains via a more aggressive aero package, and a new coilover suspension. While its 4.0-liter naturally-aspirated flat-six remains unmodified, producing 493 horsepower, a Manthey-equipped RS chopped a full six seconds off the standard car’s time around the Nordschleife.
Like the Manthey kit available for the larger GT3, its goal is to increase downforce while upgrading any components that will need to handle the extra loads. The biggest update is the introduction of a larger carbon fiber rear wing, which can now be adjusted in four different positions versus the standard car’s three settings. To compensate for the added forces, Manthey reinforces the RS’ engine cover. Aside from other subtle aero improvements, the kit includes Manthey’s well-known carbon-fiber aerodiscs for the rear wheels, while updated front fender louvers and a larger gurney flap for its rear ducktail spoiler are available as extras.
At 124 mph, a Manthey-equipped car nearly doubles the downforce generated by a standard 718 Cayman GT4 RS, from 196 pounds to 372 lb. Given the extra aerodynamic loads, the kit features a new coilover suspension with adjustable rebound and compression settings, which don’t require special tooling. Available for both cars equipped with or without a front-axle lift system, the coilers feature 20 percent firmer spring rates upfront. Braided steel brake lines come standard and improve pedal feel.
The Manthey-Racing kit for the Porsche 718 Cayman GT4 RS goes on sale later this summer. The starting price is $53,946. Optional extras, such as the aforementioned louvers and updated ducktail spoiler, cost an additional $5,890. However, neither of these figures includes installation costs. The kit is available through authorized Porsche centers that will also install it. For those eager to sample the kit before purchasing, Porsche is offering drive programs at both U.S. Experience Centers.
