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I have a 2006 Harley night train EFI. It has Martin brothers pipes on it. I’m thinking about installing an aftermarket air cleaner. I’ve read multiple threads where people say you must do a tune/map and then others where I don’t. Any input is appreciated!
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depends, id first start with checking ur current plugs, if they apper to be white and chalky at all then i would opt for a remap or full tune,

the better air cleaner will flow more air and essentially lean out the engine, if it was never mapped for the pipes u will probably run into issues
 
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