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Tr1ppy · 06-05-2019, 01:03 PM

I have the OEM backbox and tailpipes of my N53 330i if you want to do a performance exhaust type mod to it?

I think it involves cutting the box open and wrapping some or all of the perforated pipes and then welding the box back up.

06-05-2019, 01:03 PM	#4
Tr1ppy Second Lieutenant 36 Rep 278 Posts Drives: E93 330i M Sport Join Date: Mar 2015 Location: North West, UK iTrader: (0)	I have the OEM backbox and tailpipes of my N53 330i if you want to do a performance exhaust type mod to it? I think it involves cutting the box open and wrapping some or all of the perforated pipes and then welding the box back up.
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