I love the 48's. We build them for 600+ horse trucks all day long. Even ship them all over the states! My brothers dynoed 1021hp on diesel only held by our tranny and billet shafts. Once all the upgrades are done there is no reason for them to not last for 200K+miles especially with a stock truck. I just built the one in my 04 along with the motor. Next up for a set of twins.