Manthey Kit for Porsche 911 GT3 RS deletes the rear window

Porsche has revealed an upgrade package developed by Manthey-Racing for the 911 GT3 RS Wild aerodynamic modifications boost downforce to over 2,200 pounds at a speed of 177 mph Manthey said the upgrade package will significantly improve lap times Porsche’s 992-generation 911 GT3 RS is already one of the most potent factory-built track cars money…