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I have a 1999 trailblazer 250 and was recently rebuilding the motor. I put a namura piston in it and as i went to look in the intake port after finishing the motor i noticed where the bottom ring ended the small pin in the piston it was in the middle of the intake port and is slightingly catching the port. This is a brand new piston and i was just wondering if anyone alse has had this trouble with a namura piston. I have called them and they said it would be fine to run.