Needs one of these new Borla exhausts:A friend of mine bought a new all-black GMC Sierra Elevation with the 2.7T a couple of months ago. It's somewhat sinister looking and intimidating...until you hear the 4-cylinder starting and exhaust sounds from the outside - it reminds me of a husky prepubescent football player whose voice hasn't dropped yet. This is definitely not a vehicle you'd want to put a louder exhaust system on.
Gobs of effortless torque, though - very confidence-inspiring.
I actually had this idea a couple decades ago, but mine would have had a synthesized digital output based on engine revs, along with DSP utilizing a multi-band equalizer and presets of course.