Originally Posted by doz
Short is also bottom end... Long tubes youll generally have more mid-top power and shorties will produce good bottom-mid power.
If you are going to spend the money, Id go with long tubes personally. If not, just port your exhaust manifolds and save yourself a few bucks.
It's the other way around actually. Long tubes boost the low end and a bit into the midrange when comparing the same primary tube diameters. Shorties are better up top.
Longtubes are also better for cams w/ more overlap to protect against reversion back into the exhaust port and combustion chamber.
Seems like the budget hot ticket for the '09/'10s might be the SRT8 manifolds. Haven't heard confirmation if they clear/fit yet though.