to squash the confusion, mainstream never went inside that motor. They did not modify the motor. that motor was put in the same way it was found. the only modification to it was a Chrome ECU, GSR Cams and a different air filter. Dorin is in no way mad at/ attempting to get money out of, or bitching about the work that was done. I know him personally and i know the guys at mainstream fairly well and he has no,none,0, nada beef with them or any hard feelings. The compression numbers on that motor were pretty close to perfect and it had little to no leak down. What happened was an unforeseeable event. please lets not turn this thread into a ***** about shops thread, there was no way to test for what occurred. Sorry i am done now. Gl Dorin, let me know if there is anything i can do to help.