Anyone recognize these mufflers/resonator?

I am a manifolds guy, so not much help here.

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Long tube headers if you are chasing the drone back into the car, I have put the resonators in front of turbo mufflers to help quiet it down.

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☆☆☆☆☆

Long tube headers or not, the sound issue is ‘t due to headers. It’s the sound coming down the pipe, what escapes the muffler casing and what bounces back out of the muffler back up towards the engine.

So yes, you are of help!

Nice pictures.