Gxp exhaust

[CMNTMXR57]

I don't have drone with the same mufflers (just 2.5" vs. 2.25") and a Magnaflow resonator, on the Caddy and I don't have any drone on the Magnaflow's on my GTO. Got lots of other engine noises on that, but...

It can be a number of other things unrelated to the exhaust too, gearing, throttle position, load on the engine in whatever gear you're in, etc, etc... It was just in the 74 - 76mph window. Below that or above that, perfectly fine.

[05boni]

All I have is mufflers and new tips. What does the resonator do?
I tried recording the sound but it would not pick up the low dbs.
I'm going back to the muffle shop tomoro and I will see what they suggest.

[MattStrike]

If the tips are recessed enough behind the bumper cover it can cause drone. Any exhaust leak or exit that is 'under' the car will drone.

[05boni]

Just had my other exhaust tip installed most of the droning is gone this sounds way better.

[CMNTMXR57]

A resonator, for all intent and purpose is basically another muffler. However, it goes about reducing noise not just by muffling sound like a muffler and it's chambers, directors, and sound deadening material. A resonator takes the sounds pulses/frequencies from the incoming exhaust air and creates alternate sound waves/frequencies to cancel out some of that initial pulse/frequency.