Porsche's $60K Manthey Kit: Unlocking the 718 Cayman GT4 RS's Ultimate Worth?
Discover if the $60,000 Manthey Performance Kit for the Porsche 718 Cayman GT4 RS is a worthwhile investment. This article details a rigorous test at the Nürburgring Nordschleife, highlighting how Manthey's specialized enhancements in suspension, brakes, lightweighting, and aerodynamics transform the GT4 RS into an even more capable track machine. Learn about Manthey's deep roots at the Nürburgring and its close partnership with Porsche in developing ultimate track performance.
The Porsche 718 Cayman GT4 RS, when equipped with the specialized Manthey Performance Kit, poses a significant question for enthusiasts: is the $60,000 investment truly worthwhile? To answer this, a 2026 Cayman GT4 RS fitted with the Manthey kit was put to the ultimate test at the legendary Nürburgring Nordschleife, revealing the profound impact of these performance enhancements.
The Nordschleife, famously dubbed “The Green Hell” by Jackie Stewart, is an unforgiving circuit known for its 73 corners, over 1,000 feet of elevation change per 12.9-mile lap, and unpredictable microclimates within the 11 square miles of the Eifel Mountains. During an early morning session, a faint sheen of dampness on the tarmac at Bergwerk, a challenging 120-degree hairpin, immediately tested the Manthey-equipped Porsche. Despite an initial moment of extreme ABS engagement and rapid steering corrections, the Michelin Pilot Sport Cup 2 tires and the sophisticated chassis computer worked in concert, allowing the coupe to regain composure. Though the apex was missed, the car ultimately rotated and began the climb, demonstrating its remarkable ability to handle treacherous conditions and instill confidence even when pushed to its limits.
To excel on the Nordschleife, where speeds fluctuate from 45 to 175 mph and corners often appear over blind crests, through gut-wrenching compressions, and with tricky camber changes, a vehicle must be fast, agile, calm, and confidence-inspiring. The Manthey Porsche 718 Cayman GT4 RS precisely embodies these qualities, making it an ideal companion for tackling such a demanding track.
Manthey, a German race team, has a history deeply intertwined with the Nordschleife. Founded by Olaf Manthey in 1996, it was the first to establish a permanent shop near the track in Meuspath, a location now surrounded by numerous race shops and performance car testing facilities. Manthey has since expanded, boasting a modern glass-fronted complex that serves as a sales and service hub for Porsche, its majority owner.
Porsche acquired a 51 percent stake in Manthey in 2013, subsequently entrusting the team with a significant portion of its motorsport operations. Manthey manages customer Porsche 911 GT3 race cars, oversees the Porsche driver training system (which famously guided Michael Fassbender from enthusiast to Le Mans competitor), and curates Porsche’s various motorsport experiences, including track days at the Nordschleife. The collaboration has extended to Porsche’s road car business, where Manthey develops specialized parts kits to enhance the track performance of high-performance GT models while maintaining their street legality.
Distinct from other tuners like AMG, Manthey’s development work focuses exclusively on suspension, brakes, lightweighting, and aerodynamics, deliberately avoiding any modifications to powertrains. This specialization results in Manthey cars being described as “hard core track rats”—models that are louder, lighter, and feature more tightly suspended chassis than even the RS variants of Porsche’s GT models, all designed to deliver uncompromising performance on the track.