Modified my magnaflow 15588 setup as I was getting bored with the sound. Replaced the resonator with a corsa delete pipe and drove it like that for a while. Sounded much meaner but too much drone as expected. On the highway above 70mph the drone was pretty much non existent surprisingly but around town it was way too much and way too loud on startup for me.
Next, I replaced the magnaflow muffler with a Dynomax VT which is the one with the bypass valve built in. It took some fabbing for various reasons but the result is outstanding! Best I can explain it is that it's like a cross between a corsa and corsa extreme. It has that same mean corsa tone. Nice rumble on startup but you're not waking anyone up at 5AM and it settles down quickly. Absolutely whisper quiet at highway cruise (zero drone as advertised) with sound level increasing with throttle input. If you step on it hard it cracks like a mother effer and you get that extreme effect.
I'll try to get some video and post up in the exhaust section.
Here's what it looks like. They had an issue with the valve rattling on an earlier version but have fixed it. Has a lifetime warranty if something fails.