nothing beats a sleeper... more fast, more quiet ;-)A part of me feels like the sound of the car should match the performance.
Stock - stock exhaust
Stage 1 - resonator delete or CBE
Stage 2 - Down pipe adds enough added sound
K04 - Then maybe add some crackles and pops
On the other hand if you have a car that is not the fastest but you can make it sound good that certainly can add to the driving pleasure (I'm talking from previous Honda ownership). Yeah people probably laughed at my slow ass Honda but I enjoyed the added sound so whatever.
I dot care if they discovered it was good for your car and magically self cured the motor.Crackle tune might increase your EGT momentarily but not enough to hurt anything. The worst it could really do is foul your cat with unburned fuel; you'll be getting lower fuel economy anyway.