Porsche GT3 belts are designed specifically for street cars with Porsche’s factory One Piece Carbon Buckets.
What makes GT3 belts different? The lap belts use specific sewn-in brackets that fit perfectly on the factory mount on the Porsche carbon buckets. A standard belt would require additional fabrication and a spacer to make them work with the factory seats. These are a bolt-in replacement which is much easier.
The Porsche GT3 Profi 2x2 features Frontal Head Restraint (FHR) specific 2” shoulder belts, 2" sewn GT3 laps, and a adjustable T-bar sub strap.
The FHR specific shoulder belts are designed to make FHR use safer and more comfortable. The full 2" shoulder webbing fits perfectly on a FHR device, creating optimal force distribution on the surface of the device.
If you drive a GT3 Cup car or are driving a Porsche with a fixed back race seat, a standard non Porsche specific harness such as the Enduro 2x2 or Flexi 2x2 would be better suited for your vehicle.