M135i and m140i back boxes

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steve o
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M135i and m140i back boxes

Post by steve o » Tue Apr 10, 2018 8:36 am

Looking at a dual exit mod for my 120d.

Are the m135i and m140i back boxes identical in size and configuration? Ie are hangers the same, pipe connection and exit pipes all in the same place?

I ask as there seem to be more 140 back boxes available than 135s so might be easier to pick up a 140 if it will fit a 2013 car just the same?

How is the exhaust flap on the second tip kept open? Is there a how to?

Thanks in advance.
Steve.

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marco_polo
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Re: M135i and m140i back boxes

Post by marco_polo » Tue Apr 10, 2018 8:39 am

I'd PM NickCardiff for some hints & tips, he's done this reasonably recently.

If it were me, I'd weld the valve's spindle when open, to stop it rattling (more than to stop it closing).
Silver F21 M135i - ManBox - HK - Adaptive + Eibach Pro's - BBS CH-R's - BMWP Drexler LSD - TMC Piggyback - M4 LCA's - aFe Dry Filter

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steve o
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Re: M135i and m140i back boxes

Post by steve o » Tue Apr 10, 2018 9:08 am

Ok. PM sent.

Thanks.

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