Yep will fit behind Turbines no problem.
The Poly A pads really are for serious track work only as they are designed for Group A endurance car racing. Having said that, I use them on the road fine, but Poly Es are far superior from cold and a much more versatile pad on the whole. They will still withstand very high temps and dont necassarily even go off after 900 degrees its just their peak operating temperature.
I recommend anyone to go with the Poly Es first, unless your car is a dedicated track car.
The majority of people are using the Poly Es and everyone so far is giving very good reports for both track and road.