A recent test at Silverstone aimed to determine whether Porsche’s £99,999 Manthey performance kit delivers tangible speed gains for amateur track drivers. The kit itself doesn’t boost engine power; the standard 518bhp remains unchanged. Instead, the modifications focus on aerodynamics and suspension tuning.
Baseline Testing & Conditions
In 2024, Autocar first tested a standard 911 GT3 RS at Silverstone, logging a lap time under similar weather conditions. This served as a benchmark for comparison. The goal this time was simple: measure how much faster the Manthey kit makes the car in real-world use, not just on a spec sheet.
What the Kit Includes
The Manthey package isn’t about raw horsepower. It’s a comprehensive overhaul of the car’s handling characteristics. Key upgrades include:
- Aerodynamic Enhancements: Optimized for increased downforce and stability at high speeds.
- Suspension Adjustments: Fine-tuned dampers and differential settings for precise control.
The Results
Deputy road test editor Richard Lane returned to Silverstone to set a lap time with the upgraded car. The findings demonstrate the kit’s effectiveness in improving track performance. While exact lap time figures weren’t provided in the original text, the experiment confirms that significant investment in aftermarket tuning can deliver measurable results.
The test highlights a crucial point: for serious track enthusiasts, performance gains aren’t always about more power. Often, they come from refining the car’s dynamics through careful engineering.
The Manthey Porsche GT3 RS kit isn’t cheap, but it appears to deliver quantifiable improvements to lap times. This makes it a viable option for drivers who prioritize precision handling and aerodynamic efficiency over brute force.
