The headers are supposedly a constriction on performance in the Aero (at least I've heard it said). What kind of driveability / throttle response /power / torque benefit would there be in getting updated headers - or is it only going to be noticeable with an upgraded engine?)
See this thread....
http://www.pistonheads.com/gassing/topic.asp?h=0&t=398783 it's worth reading all the way through. Remember that the AJP Cerb installations do not run linked exhausts..same as Morgan Aero's... and that the 4.4-4.6 M/N62 are roughly the same engine size as the AJP 4.5 so comparisons can be made. The header dimentions can be used as a reference.
If you're interested in BHP gains/movement of peak torque/power then you really need to look at some of the comparison tables in the 4 stroke performance tuning book which has comparative exhaust headers on a set 2000cc engine.. the engine dyno'd each time to compare results. It makes interesting reading, it also shows how to tune induction for peak power and exhaust for peak torque to get a balance throughout the rev range.
