[Modian]

Before I go eBay hunting, I wanted to see if anyone local has a stock 964 exhaust, heat exchangers back, they want to part with.

The B&B drone is driving me nuts so I want to start from stock and experiment with cat bypass, Cup pipe, and g pipe combinations.

[Modian]

Got heat exchangers and cat. Anyone have a primary muffler, secondary muffler, or tip?

Also open to cat bypass, cup pipe, or long tube g pipe.

[Carrera51]

Aaron:
If you have B&B headers, if you swap your dual out muffler for a B&B single out, then the drone will go away.

[Modian]

You’re probably right, Mark, and I wish I had done that when I replaced the Magnaflow that was on there with a new B&B dual out. But I don’t want to spend another grand to fix it, and then potentially more to address cracks I suspect the headers have inside the heater boxes*, and deal with questionable modifications a previous owner did to the headers, when I can get stock components with minor upgrades for less money that put out equivalent power since the engine internals are stock.

*unless getting a headache when driving with the windows up and heater on, and smelling fumes when letting off the gas, is normal with headers and catless exhaust.