I am very aware that they DO NOT make a Compression brake (Jake Brake) for the 2nd gen Cummins. Question is, Is there that much difference as far as the top end of the motor that using a Loadleash Engine Brake meant for a 2003 and making it fit on a 2001 block? I haven't played around a 3rd gen motor first hand so there could be major differences that I am not familiar to. I know they make plenty of exhaust brakes and all but nothing beats a Jake Brake IMO.