For a wide power band there is nothing that works better on the street than the stock exhaust.
I heard that from nigel patrick at patrick racing.
People change it because they want more noise.
The Patrick Big Air Kit is the best.
I run one with a Power Commander and a D&D slipon.
It sounds nice & deep without that loud raspy noise that most of the full systems have.
The added benefit is that if you have to pass a sniff test all you have to do before you get inspected is put the stock slipon back on !
I have 43,000 miles on my Strato in 2 years.
She's a SWEET gal.
JJ