OK gentlemen I have a 2002 525i I have 2.5 inch headers and highflow cat being installed this week along with high flow air filter (seeing as how I do not need a CAI) how do I tune my ecu? Any programs and cabels I need? Or do I need a whole new ecu? Also would slightly larger injectors be of a use (plan on using a vortex stand alone supercharger in the near future). And does anyone produce hotter coils? Thanks you guys are awesome
Justin
Justin
Is my ecu tuneable for my mods?
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