# Porsche Manthey Kits: Track Gains Without Power

> Manthey upgrades boost Porsche GT3 lap times by 0.6 seconds without adding power.
- Title: Porsche Manthey Kits: Track Gains Without Power · Road & Track
- Summary: Manthey upgrades boost Porsche GT3 lap times by 0.6 seconds without adding power. Porsche's Manthey track kits improve lap times by 0.6 seconds per lap on…
- Keywords: porsche, manthey, gt3, track, lap time, aerodynamics, suspension, brakes, downforce, valencia, cars, sports
- Source: Road & Track — https://roadandtrack.com/reviews/a73852476/is-mantheys-magic-worth-it
- Author: Matt Farah
- Published: 2026-10-09T14:26:09+00:00
- Read time: 1 min
- Topics: porsche, manthey, gt3, track, lap time, aerodynamics, suspension, brakes, downforce, valencia, cars, sports
## Manthey's 30th Anniversary
Porsche's in-house racing division Manthey celebrates its 30th anniversary this year.
## Manthey's Origins
Manthey was once a separate organization that purchased and ran Porsche race cars in Germany's DTM and at the Nürburgring 24.
## Porsche's Stake
Porsche took a majority stake in Manthey in 2013 and now produces specialized track packages for road cars.
## Track Performance
The GT3 RS MR is 0.6 seconds quicker per lap than the standard car at Valencia with Timo Bernhard driving.
## Lap Time Gains
The lesser GT3 Weissach is one second quicker per lap once fitted with a Manthey kit.
## Street Legal Kits
Manthey kits are sold as dealer-installed accessories with factory warranty protections.
## Track Focus
The GT3 Weissach bested the Mustang GTD around Thunderhill while down nearly 350 hp.
## Aerodynamic Changes
Manthey triples the length of the aerodynamic vanes underneath the car, creating a nose-to-tail element.
## Downforce Boost
The kit produces 780 pounds of downforce at 177 mph with the rear wing and aero discs.
## Track Handling
The car improves poise when aggressively taking curbs without requiring high speed.
## Braking Performance
The pads allow braking up to 50 meters later at the end of long straights.
## GT3 RS Comparison
The standard GT3 RS is two seconds quicker than the Manthey GT3 with the same power.
## Aero Package
The GT3 RS produces 1895 pounds of downforce at 177 mph, 50 percent more than Manthey's GT3.
## Driver Skill
The Manthey RS requires driver skill to extract incremental improvements without compromising handling.
## Track Results
Timo Glock got the MR around the track six-tenths quicker than the regular RS without extra power.
## Key takeaway

Porsche's Manthey track kits improve lap times by 0.6 seconds per lap on circuits like Valencia without extra power or reduced fuel efficiency.