Review on 🚗 Walker Exhaust 21558 Quiet-Flow Muffler for Enhanced Engine Performance by Gary Duncan

I'll bet about 3.5. I was hoping it would be quieter than it is now. But it's still not bad. The name suggests that it will be a "silent stream". It's not exactly quiet - it's more like a slight import of a higher pitch. (not loud - just needs a little more cushioning). I think I would give it 5 stars if it had a softer and deeper sound/pitch. The high frequency tone makes it sound a bit cheap.