Porsche 911 GT3 With Manthey Kit Is 4 Seconds Faster Than Stock On 'Ring - Motor1

This is much more than just an aftermarket tuning kit as it was developed in close collaboration between Porsche engineers and Manthey specialists.

Manthey may be best known for its competition Porsches and its actually one of the premier builders of race cars based on Porsche products though it also works on road-legal vehicles from Stuttgart. … [+2087 chars]

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