Slugman wrote:
For what it's worth, mine drones too.
At some stage in the future I'll be wrapping the entire length in two layers of heat-wrap, & trying to protect it somehow by covering it in.
I dunno if it will make much difference. Honda must have done a LOT of work to make sure it sounds ok inside.
I've got a 2-1/2" Stainless, cat, hotdog/resonator & muffler. The only real diff between mine & yours is I have a single outlet. I'm assuming your bracket at the back is holding the twin pipes tightly, & they are not just sitting on the metal bracket. Yes, the bracket is suspended on rubber, but the pipes could be vibrating on the bracket if not held to it.
Otherwise, you might just have to add 100kg of sound-proofing into the car.
The twin pipes are fully welded onto the muffler and the bracket welded on too. Just the rubber cotton reels between the bracket and subframe.
The Honda muffler is massive and even if I wanted to use it, it wouldn't fit without dragging on the ground.
Bennjamin wrote:
Consider replacing the middle resonator with a double length unit ( up to that first weld )
Yep that will be one option.
I replaced the gasket in front of the cat with a steel plate with holes and then added some steel wool in front of the plate. This made a big difference. Not ideal for long term but it reassured me that it can be quietened down somehow.