Im simply looking to replace my standard yamaha air filter on my xt660R.
K&N obviously have a brilliant reputation but should i look at anything else? I have beowulf cans fitted so thought i should sort the filter out too. Will replacing just the filter give me much more performance results? I have read alot on here about various "stage" filters but i just get confused by it all as i'm not the most engine orientated man in the world!

Cheers!

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