Well after doing some tests on my freinds car the motor needs to come apart. What is the strongest longest lasting piston ring for diamond pistons? Currently it has Total seal rings on it and this is the second time it has had some blow by with these rings. The old TRW piston combo and i believe power seal rings never had a problem. Looking for what the extreme fast cars run for rings as he is gonna be adding some more parts looking for mid to high 9's.