Will this seat work with my factory seat rails?

No. Racing buckets are designed for custom mounting or dedicated race frames. You'll need to fabricate or source a mounting bracket kit specific to your car's platform, or use the included slider base with custom frame welds or bolt points.

Does the slider base come pre-welded or as a bolt-together kit?

The seat ships as a complete assembly. Mounting method for your specific vehicle is not detailed in the product specs — test-fit the slider base to your floor and determine whether bolting, welding, or bracketing makes sense for your setup before committing.

Can I recover the upholstery if the red fabric gets damaged?

Yes. The seat uses standard automotive-grade fabric over a foam-padded shell, so any upholsterer familiar with racing seats can recover it. The FRP structure underneath will hold up to multiple recovers without degrading.