if there's a flange between the middle pipe & the muffler,
disconnect the muffler from the middle pipe/resonator & listen to it... sample A
i know there's still a mid-muffler...then disconnect that from the cat & repeat listening to it... sample B
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here's a suggestion while you're contemplating on going turbo or staying NA:
so if you still like open pipe, then your choice to go B (with gutted cat, original cat, or test pipe)
if you like the sound of A, just get the fab shop or DIY to cut that fart can off the existing flange-pipe and weld/ clamp an open pipe to exit the back bumper.
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(i agree that open pipe is very loud; you can youtube those as well if you're lazy to do disconnect your exhaust)
I rode with an open pipe for some time back in the day because the rust naturally open a big hole where the OEM s-bends were & the mini-muffler was also rusted out.
Being a DD for me, i just went with an aftermarket OEM replacement w/ a lifetime warranty & didn't have to impress anyone with my exhaust note
