What is the difference between the LS1 and C5 brake calipers?
They are based off the same design but there are more differences then I originally thought. The C5 caliper has stiffing / cooling ribs that extend the full length of the caliper, where the LS1 caliper only has them on the back (as you can see in the picture below). The C5 caliper is produced by a method called pressure casting and the LS1 caliper is produced by gravity casting. This means the C5 caliper is stronger and more durable.