These are the Cusco Power Brace Front and Rear Seat Rail Plus. This is a rail designed to actually bridge your mounts together to reduce body twist. Additionally, these have been designed with anchors to provide you with a safe mounting provision for your main harness belt connections. 

 Cusco Power Brace Seat Rail Plus Front and Rear 

REAR SEAT RAIL FEATURES:

• Rear location of your front seat rails only
• High-strength steel construction
• Powder-coated in Cusco's flagship blue finish
• Designed to connect the left and the right side of the seat rails to reduce body twist
• Equipped with anchors to provide you with a provision to connect your shoulder harnesses
• Simple bolt-in installation 

FRONT SEAT RAIL FEATURES:

• Front location of your front seat rails only
• High-strength steel construction
• Powder-coated in Cusco's flagship blue finish
• Designed to connect the left and the right side of the seat rails to reduce body twist
• Equipped with anchors to provide you with a provision to hook up a crotch belt on a 5 or 6-point harness
• Simple bolt-in installation 

NOTES:

• Sold as a complete set for the driver and passenger side seats