Originally Posted by Grizzly
The old Thrush Turbos can't be beat, especially at 28 dollars each on Amazon.

I had them and they were surprisingly quiet, upped my performance a bit, and had a great sound at idle (318 2bbl W150)


Yep - they are quiet & sound "flat." The reason they are quiet, is they have small flow tubes internally. The Thrush California Boss Turbos with 2.5" inlets & outlets, have 2" diameter flow tubes inside. I used to look at blueprints of them all the time! They are NOT performance mufflers.

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