@panteradoug posted:I will add that I have the Porterfield pads on two cars.
The pads don't necessarily add friction to the system to give you harder stops.
What they do is give you less brake fade at hard use like in hard autocrossing.
As a matter of fact, the Porterfield pads DO provide more friction than the stock Pantera brake pads, especially when cold. The stock Pantera brake pads will wear out your rotors before the pads themselves wear out - maybe a bit of an exaggeration... But they will not stop the car quickly in a panic stop when cold. Ask me how I know! The stock pad must be warmed up to work effectively, and even then they're not great!
The Porterfield pads on the other hand will stop a Pantera quite well, even when cold!