Sound tuning with original exhaust system

Is it possible to improve the sound of the original exhaust system by manipulating the flaps to keep them open in the lower rpm-range already? Does this improve or worsen the power or torque? This would be much cheaper than to buy a sports exhaust! Thank you for your tips!

So you can afford a 360, but you can't afford an exhaust system for it? riiiight...
The flaps are there to increase low-down torque I believe. Removing them will hurt performance.