Just curious...what one of these systems would you buy....being price cautious...

Stebro
Tubi
BillyBoat

All are cat back, stainless, etc....any input? Sound? Tubi and Stebro being the most the expensive and BillyBoat being the cheapest.....
for 4.4 engine...looking for a bit of sound but not too much? not sure if there is such a thing.....i was almost leaning towards billyboat...price wise and sound wasn't too bad, barely noticed....