All 5g Camaro axles are designed to work with a factory 32 spline differential and 33 spline wheel hub. SS and ZL1 are the same spline counts but are NOT interchangeable!
The Camaro SS center section generally starts losing reliability around 800hp, but those who have been able to get them to survive, have also seen our axles live as high as 1100hp, with the average customer hovering around 750-800hp. The only noted power related failures coming from high torque TVS/nitrous combo cars.