[phpBB Debug] PHP Warning: in file [ROOT]/ext/cleantalk/antispam/model/CleantalkSFW.php on line 184: Undefined array key 1 Which air filter? What sound? - Page 2 - UK-POLOS.NET - THE VW Polo Forum
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some one was telling me that a new air filter wont make a difference unless the ecu knows that there is an increase in air in the engine otherwise it wont make a difference or it could make things worse.
potentially yeh, you would need a remap to get the full effect of a BMC, but a remap is really only benificial(due to its cost) if you have a number of engine mods, meaning you'll get the maximum effect of all the engine mods together.
Go for the BMC or K&N Apollo, they are the most expensive for a reason! I'v only ever seen them in the top 3 when its came to comparisons etc