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  1. BMW Tuning Forum
    Hoping to get a 335i and am just planning mods. What are the main options for achieving 400+bhp? I was guessing simular to stage 3 on my vxr, so exhaust, fmic, map? I was looking at the following fmic - BMW 135i 335i Upgrade Intercooler N54 N55 Engine AR Design downpipes -...
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