I run Cass's Stage 4 brake kit currently.
In terms of total piston area, I believe the current calipers he offers in this kit would be similar to the 4-piston GEN II Viper calipers. The calipers Cass provides use an 03+ GEN III Viper brake pad already.
So, what am I missing here other than the (possibly) lighter, two-piece rotors? Just the ability to use the authentic Viper calipers?
I kind of agree. The Viper caliper would be a lot nicer though since its made by Brembo.
I have Cass's Stage 4 kit also but I have Carbotech pad 592 which is for a 2001-2002 Gen2 Viper and it works great! Hauls 3400 lbs. down from 140 mph with no problems.