Originally Posted by r6elmo

i talked to a 997.1 owner at one of mooty's days and he had a cup engine in his car. He said his original motor had 50K-ish miles on it and the rod bearings went and took most of the motor with it. he said the 50K miles were mostly track miles.

so sounds like these motors are pretty reliable.

Originally Posted by Bgoldey

There's a 997.1 GT3 in my area with 176k miles. Engine rebuilt at 159k miles due to valve guide issues.

61k miles on mine.