Manthey's Porsche Cayman GT4 RS Kit Doubles Down On Downforce

The Porsche 718 Cayman GT4 RS now has its own Manthey kit. The kit does what others before it have done, promising improved performance on an already insanely capable performance machine. Manthey claims a six-second improvement over the RS’ Nurburgring Nordschleife lap time, which falls to 7:03.121.

The improvement comes not from more power- Manthey’s GT4 RS will still make 493 horsepower- but from other changes. Front spring rates rise by 20% on an already stiff car, and a special inverted coilover setup has been co-developed with Porsche. Manthey says compression, rebound, and spring rates can all be adjusted (should you be versed in the wizardry that is suspension geometry). Steel brake lines are fitted as well, and in case you have a little “whoopsie” in your $200K+ sports car, tow loops can be ordered. Cars will be sold in one of two variants, either with or without the axle lift system.

The largest change comes courtesy of aerodynamic improvements, most of which center around revisions to the car’s rear wing. Manthey has added a fourth position for the adjustable wing. At 124 mph in its highest setting, downforce rises from 196 lbs. on the standard GT4 RS to 372 lbs. The tuner says it even had to add carbon fiber reinforcement to the engine cover to help the car cope with the new levels of downforce. An optional $5,890 package swaps the front fender louvers with carbon fiber ones, and the rear ducktail gurney flap with a similarly large and carbon-festooned unit. All this won’t be cheap, of course. You’ll be able to order the Manthey kit through Porsche for a cool $53,946. If that sounds like a lot, the Atlanta and Los Angeles Porsche Experience Centers will make a Manthey-tuned GT4 RS available to drive first.

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