Can you post a quick video of how she sounds?

Great insight on the 4.6is resonator. Would be interesting to see if 4.8is resonator is the same configuration.

Yeah kiwi post a video!




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Wait- Don't the perforated holes make for an effective crossover? I mean- they're two pipes, sure. But since each is not sealed bc of the holes in the pipes, they're effectively open under the unsealed insulation and wrapped by the larger outside of the resonator.

This *is* a cross pipe in effect then, yes? Well insulated, sure. But still open to each other.

But you see the two perforated pipes are in different chambers so they can't crossover.

The pipes next to are solid.




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Are they sealed with welds? is it loose enough that the can pipes move by hand within the chamber? Otherwise the gas- like water- will find a way. They look to be slip fittings of the solid piper over the one with holes.

Not sure if the flared ends are sealed but the exhaust also is like electricity and water, it will always follow path of least resistance.

I'll pour water through it see where it leaks.


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THAT is a fine idea!

If you can provide *any* pressure in there as you do, that will be a good indicator. There has to be tremendous pressure inside there when the outside is welded. I know I lost back pressure when I removed mine. I can't imagine what pressure you'd have to add to larger water molecules to find the holes, but it's a great idea.

Any unsealed opening/crack inside will be filled with *some* air/gas. Under the right pressure, air and water will find *every* open path- not only the least. This is why the whole system is welded/sealed front to back.

It looks like the chambers cannot be air tight. They're not welded to the outside metal 'wrapper'. If you were able to lift the outer metal, exposing the two chambers, they're not welded/sealed against it. Under the rt pressure, the air will fill the void between the two chambers no matter how small the opening. If they were sealed chambers, you'd expect witness of that in the oily black residue that is on the metal. A sealed unit would reveal the seals where oily air could not flow. Since it's pretty uniform, it appears to be open to each chamber.

Yeah it was double walled. I won't be able to pressurized it the water will just show if the flared ends are designed to leak and also if the chamber walls leak as well.

We will just have to use theory to assume the rest.


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Without pressure, you'll need to seal up the holes in the pipes to test with water. You could use silicon, but that's getting into some effort.

It looks pretty open to me. The black on the upper pipe here shows tell tale signs of an exhaust leak. If they were welded edges instead of flared without the evidence of a leak, I'd look at the chamber walls. But the consistent layer of soot on the outer wall of the resonator- even over the edges of the chamber walls looks like air can pass.

Edit: I edited your pic to show what I think looks like a leak would anywhere else: