![]() ![]() ![]() The K&N and DNA are both cotton gauze and aluminium wire mesh where as the UNI filter is of foam construction with a wire framework. ![]() Filteration efficiency was not a concern as all the major brand filters on test have very good filteration efficiency.Īirbox filters The three brands of filter we decided to test were K&N and UNI filters as they've been around for many years and are trusted in the performance engine industry, along with a relatively new European brand called DNA High Performance Filters and we chose these because they were building a good reputation in European motorcycle racing. We wanted to sell a good filter that worked best on the Triumph twins. Our criteria was easy, it was all about airflow. We entered in to testing the air filters with no data and no idea what would be revealed. More air in equals more power out.įirst on the list in our development programme for increased power from the Triumph twins, was to ensure we had an air filter that performed superbly within the confines of the factory airbox and could be qualified by our testing as one of the best available for our bikes. A smooth and non restrictive air path is neccessary on both sides of an engine for this to be achieved. Much of the work carried out to an engine to release more power is based on sucking as much air as possible in on the induction stroke and evacuating as much exhaust gas as possible on the exhaust stroke. ![]()
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