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      04-06-2018, 03:58 PM   #4
davidfield
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United Kingdom
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Drives: M240i F23 MPE mods4car module
Join Date: Dec 2015
Location: Edinburgh UK

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There is a Facebook forum dedicated to UK M135i/M235i & M140i/M240i and they are split between the JB4 and the Bluespark. Some saying Bluespark is smoother but JB4 gives slightly more power. I think I'll go for the Bluespark. Going to order it this weekend.
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