The air filter is one of the most important components when it comes to increasing engine efficiency. The more air enters the combustion chamber, the more power and torque will be developed.
For this reason, replacing the air filter with a high-performance element is often one of the first changes made to a stock engine, significantly improving both functionality and aesthetics. 
From Wisconsin, USA, S&S Cycle presents the new Stealth air filters for Harley-Davidson, approved for Europe. This new range of filters combines high intake air flow and a "muscle car" aesthetic, all while meeting European emissions regulations.
If you'd like more information about the models and prices of these air filters, you can access them from these links:
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