Verdict - Preformed great, very pleased!!!!
The best stopping combination so far on my 08 sedan with 140K is Brembo UV Coated rotors and Advanced Auto Parts Carquest Wearever Gold Semi-Metallic Brake Pads Previously I had Zimmerman rotors and Hawk HPS pads, I got a grinding feeling/noise when stopping. The Carquest pads dust like OEM but for the stopping power and smoothness/linear feel I will put up with it.
The limiting factor was tire grip Oregon Raceway Park (ORP), clockwise one day and counter clockwise the next, is hard on the brakes, tires and suspension with the hardest braking zones being downhill and the brakes did not complain both days. GiroDisc is definitely doing its thing and the HPA rear BBK is doing its part.
I am happy to report that I experienced no fade and the brakes were consistent and solid the entire time. I believe the GiroDisc rotors are doing a fine job at evacuating heat and in combination with the HPA rear BBK, the car stopped strong and flat. I am a happy camper.
End of the day, and these are the best performing brakes I've ever had equipped on the car. They felt exactly the same on the last hot lap as they did on the first. I also ran titanium backing plates, and had zero fade issues all day. If they hold up over time, I highly recommend these over the OEM rotors if you track your car.
For any of you that have upgraded to TT RS front brakes and track your car, you might have learned that the OEM rotors just aren't up to track duty if you push your car. I was warping the stock rotors from heat during track days. So I went in search of a two-piece rotor and initially found two options, both of which came in at well over $1,200. My timing was good however, as I stumbled upon a thread in the TT RS forum about an owner that had just fitted his car with a prototype from Giro Disc. I'd never heard of Giro Disc before, but some research gave me comfort they were producing a quality product. I reached out to Mike at Giro Disc (who couldn't be more helpful) and they had a few more sets available, so I was fortunate enough to get my hands on one of them. And just in time, as my next track day is in two days. I just installed them, and as you would expect, they are a direct fit. I'll post performance impressions after my track day, but in advance of that, here are my initial thoughts: - OEM rotors weighed in at 26.6 lbs and the Giro Disc are 19.8 - There is significantly more spacing, which will hopefully move more air and allow for better cooling.
Best bang for buck brake setup on a Corrado/Mk3 Front: 11.3 DE's with Tyrol Sport Bushings and a proper pad and brembo OE rotors Rear: Stock rear, Mk4 Calipers, proper pads, and brembo OE rotors. Rotor material is too often overlooked and a must for proper performance. Brembo seems to have the best metallurgy IMO.
I did buy replacement rotors (Brembo) and pads (Bosch quietcast) from FCP and I have no complaints.
I know my Brembos cracked like a Mofo. They are still kicking ass and unwarped though
The front rotors were in a box from Zimmerman and rear were from Brembo. Just about from the start the brakes slightly squealed. The noise gradually increased that nearly each time the brakes were stepped on they squealed. After about 2K miles the noise got to the point of being excessive. They squeal in the morning when cool when slowing from 20MPH or warm and hot when slowing from 45+MPH. The only way to make them silent is to slam on them hard, but the next time they will squeal as well. In addition to the noise, the rotors started developing rust on the hub sections.
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