it has wiseco pistons. ive found that you really dont need rods until you exceed 20 or so lbs. some people may disagree, but ive done it and had good luck. ive built quite a few H-series motors, and i did this one to be a daily driver, on 10-15ish lbs. the motor is still brand new, just broken in, has about 2k on it now. im going to convert it to synthetic soon. ill probably let it go 500 more on the oil in it now (third change) once i do that, it will be completely set to run full synthetic and only need changed every 5k (ish)