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So to add quad tips to a OEM 335i exhaust, would need to put on a new rear bumper with diffuser for Quad pipes, or can you buy a Quad diffuser, for the OEM bumper and cut the openings to accommodate the Quads?
I have a damaged bumper, and need to replace it, but not sure if I can get a OEM bumper and add the Quad diffuser, and buy quads chrome tips, or need a whole new quad style diffuser bumper?
Also, if I bought a OEM bumper, can you add a diffuser to it, for dual tips?
Thanks
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