[SPAWN]

True a H will give a deeper tone but the X will create a little more HP.

This is my experience with the new stangs. believe it or not the exhaust is very very similar between our cars. You also have the drone issues we have from the variable timing and the fact that the mufflers are at the rear of the exhaust.

That big Baffle tank (Resonator) is killing power. as the exhaust builds up in it it is also trapping allot of heat generated by the cats in the hump of the car. then as pressure builds it has to find its way out the small holes in the back to the mufflers.

Just like everything else the exhaust needs to flow smoothly with as little obstructions as possible. then you will generate more HP but keep in mind a little back pressure creates Torque and Torque is what the real power is. Torque is what propels you down the road. This is why all those little rice burners with a turbo are so fast. the torque is incredible from a turbo and thus they are so quick. The more of it you have the quicker you will be.