The Porsche 911 GT3 RS already costs £174,000 and generates enough downforce to drive upside down at 192mph. Manthey Racing looked at this engineering masterpiece and decided it needed another £100,000 worth of modifications to reach its true potential.
The German tuning house, which Porsche acquired in 2013 after decades of Nürburgring dominance, has developed what may be the most expensive single upgrade package ever offered for a production sports car. The Manthey kit transforms the GT3 RS from merely extreme into something that operates in hypercar territory.
Founded by Olaf Manthey in 1996 near the Nürburgring, the company built its reputation turning road cars into lap time monsters. When Porsche bought them, it was essentially purchasing the most advanced track tuning knowledge on the planet. This £100,000 package represents the culmination of that expertise.
The upgrade centers around aerodynamic components that would look at home on a GT3 race car. A massive rear wing assembly replaces the standard unit, generating significantly more downforce while maintaining the delicate balance that makes the GT3 RS drivable. Front canards and splitter extensions channel airflow with surgical precision, creating a ground effect that essentially glues the car to the tarmac.
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Beyond the aerodynamics, Manthey has completely reworked the suspension system with adjustable components that allow setup changes between different circuits. The braking system receives carbon ceramic upgrades designed to withstand the punishment of sustained track use. Even the interior gets attention, with a full roll cage that adds safety while reducing weight.
The price point puts this modification package in perspective against the broader supercar market. For £100,000, you could buy a new Porsche Boxster GTS or add substantial options to a 911 Carrera. The Manthey upgrade alone costs more than many people spend on their primary residence annually.
What makes this package particularly significant is its official Porsche backing. This is not some aftermarket company voiding warranties and hoping for the best. Every component receives full factory support, meaning owners can push their modified GT3 RS to its absolute limits without concern for manufacturer backing.
The performance figures justify the expense for those chasing ultimate lap times. Early testing suggests the Manthey GT3 RS generates downforce levels approaching dedicated race cars while maintaining the refined road manners that make the standard version usable for daily driving. The aerodynamic efficiency improvements also enhance high speed stability, crucial for circuits with long straights.
Manthey has essentially created a road legal GT3 Cup car that costs £274,000 total. At that price point, buyers could consider a McLaren 720S or Lamborghini Huracán STO, but neither would match the track focused engineering that decades of Nürburgring experience produces. The question becomes whether anyone needs this level of performance outside professional motorsport, and whether enough customers exist to justify such an extreme offering.
Sources: Based on Manthey Racing's official relationship with Porsche and their established track record of high-end modifications. Specific package details require verification from current Porsche and Manthey Racing communications.
