VMR
Member
Just talked to Borla Tech. Very helpfull.
Two things to check when I'm home:
1) Muffler internal damage. Ensure the muffler sounds solid when taped and not hollow or empty sounding.
2) Change the intake back to stock. He's fairly sure this is the problem. Reports of certain intakes resonating with the exhaust.
Now I need to go find the old OEM intake in the attic...
I bet it is the intake along with the exhaust. I have the Ford Racing (made by Borla) sport exhaust it has deletes the resonator and splits into (2) small straight through mufflers (unlike yours which is one muffler) I get some drone around 65-70 mph under load but it is nothing like you are describing. I'm running the stock intake.