what would be the best choice for my car? mechanically its a 383, bored .040 over with a performer intake, 780 electric holly, headers, ignition, and coil. but i just dont think the 2 inch duals are cutting it very well. so i was thinking about going to an H pipe system, at about 2.5 inch with borlas. i just wanted to know what you guys thought would be best for my ride, for driving, it does about 2900 rpm most of the time (highways) but its a muscle car so it needs to be strong off the line as well. i was also reading and i read that x pipes are better? so right now, its just up in the air (along with where the money will come from). any input would be greatly appreciated.