Ok, as jakaracman mentioned, the 745 is gone and replaced with the 750 (same as 545-550 and 645-650) The N62B44 is being replaced with the N62B48TU as of 5/05 for the 06 model year.
the power is now up to about 360HP@6100RPM
ConRod bolts are narrower, down from 22MM wide to 18MM, Crankshaft has been changed from a graphite alloy to steel to handle the higher stress. and the main bearings are now a 3 piece bearing.
The intake has been completely changed from the opening all the way to the DISA unit (variable intake runner length) The DISA unit is no longer infinetly variable as on the N62B44, but now a two stage short/long runner.
The list has also been updated with the changes.
