The brakes on the Coupe are Girling G60's. Dual piston (leading/following piston, different sizes), floating style. The pistons are only on one half of the caliper. They work pretty well on a stock car, and there is a small selection of aftermarket pads that work fairly well.. If you push the car, the brakes will heat up and fade. Some things like better brake fluid (higher BP) and different lines can help pedal feel and reduce fade. However, the factory caliper has limits. They are heavy cast iron calipers and cannot dissipate heat all that well. After fading my brakes several times, I felt that they needed to be better, along with the suspension (upgrades happened at the same time). My options were limited at the time to Wilwood DynaLite I's and some very expensive Alcon calipers. Vortrag agreed to come up with a new system for me. Porsche modified Brembo calipers. Lightweight aluminum 4 piston fixed calipers. Nice pieces, half the price of the Alcons and are street friendly (unlike the DL1's). They work very well time after time. I have never faded these brakes, even in 100+ degree heat.
Update on the braking system. I am making new caliper carriers for the 993C2 calipers. Material is steel, likely coated with a product called MetalMask. Should last longer than the aluminum version that is looking quite scary now after 5-ish years of service. The rotors are Wilwood HD vented units, and the hats will be such that the rotor is now semi "floating" type. Should help alleviate any warping issues the old setup had. Couple reasons why I was having problems is that Vortrag installed two right-side calipers on my car, and at some point the flex lines were kinked. I now have a left and right side caliper and new lines. Ironically, the used 993C2 caliper I picked up has approximately the same mileage as the calipers originally put on.
The hats are almost finished, just need the lug bolt holes drilled in one and the rotor bolt holes drilled in the other. Also, the carriers are only in need of two holes tapped in each (well, they could use some weight reduction). Will have pictures when they are all finished up.
The new rotors have arrived, after TWO MONTHS of waiting. They are Wilwood Curved Heavy-Duty units, which means they are directional. 7" 8-bolt pattern, 310mm x 32mm. Part numbers 160-3870-RH and 160-3871-LH, very reasonable cost at $69 each plus shipping (28lbs ship weight for both). The Coleman "Frozen Rotors" they are replacing were 304mm x 32mm with straight vanes (non-directional). Hopefully these new rotors will provide for fewer problems!