The whole point of a back-box is a well-designed baffle. It's the thing that should reduce noise without having a significant impact on flow. Removing or modifying an existing one is not an activity to be taken lightly.
If you need an oem back box I have one in my garage... Unfortunately I binned the b pipe as it was pretty rusted.
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Get a broom handle and blast that mother like a teenager.Are baffles easy to remove?
So, I could get an oem backbox (sold mine ) and stick a 2.5" unsilenced b pipe on. Or, get a new custom exhaust. Or, a secondhand aftermarket catback. I got the 5zigen because it's not noisy, any recommendations for a £250 ish mid noise catback?
Back in the day a good combo was the spoon mid pipe and oem back box.
Sounds like a Mimms fart pipe special though. Very raspy.
I found the sportex mild steel b pipe to produce less rasp owing to the extra mass of the material.