Yea, the "30 HP" was on his 454 tow rig. He has alot of huge engine beasts, so I don't know if he even knows what will work on a little four banger. I will check on the magnaflow site to see if there is a difference. Other ideas or comments? Post up!
EDIT: Supposedly no sound difference between oval and round, just shaped different for fitment issues.
Anyone running a flowmaster 60 series?