Clearance for RPM Air Gap...

You guys should have a policy, everybody agrees which way to do something. Insulator on, or insulator off. :D Actually that insulator would be for sound aborption. Not that I have an issue with sound. The exhaust note on my car is rather bad-***. Except at certain rpm, it is rather quiet. 40 mph sounds awesome. 42 - 52 rather quiet, then 55 mph kind of loud again.

The engine makes a lot of clatter that is not exactly flattering. My son and I were riding back home one day, and he had met me and left his car (2005 G35 6 speed) in a parking lot earlier. On our way home after I dropped him back off at his car, near the house I got to thinking I wanted to be first in the driveway cause the Scamp goes in the garage, and his stays (in my way) on the driveway. We came to a light that was red but turned green before we slowed down too much. I whomped on the Scamp and went screaming by. I asked him if it sounded good, and he said, "it was just loud noise." Ok, I get it. Late model Mustangs with loud exhaust sound phenominal. But that's a function of 4 valves per cylinder, engine rpm, exhaust configuration, and years of learning how to quieten the mechanical noise of the engine. The ole 360 does make a lot of mechanical noise, as well as sucking air through the filter, carb and intake.

All that being said, not that the insulator is a hugh noise absorber, but the less that noise I hear, the more I get to hear the exhaust. So, I'll leave it on if I can.

Now … about that policy. Everyone should agree with me now... :D