Quote: I've had them on 2 cars so far with 2.5" full exhaust using an H-pipe, and no drone. Sound crisp, nice tone, not too loud at idle or cruise.
There must be something different about your systems that keep it from droning.
I run the super turbos with headers and a H pipe, no drone. I think it has to do with stock exhaust manifolds or no H pipe. But I think stock exhaust manifolds are more the reason they drone, JMO from reading here.
