Sa Banaue,or sa mga auto center sa mga mall but a bit expensive but the difference is not that great sa BLADE ok ang price hindi taga ang presyo but some of their products are higher a bit. Mga cone type if racing type habol mu or you can go for drop in as showed above. Cone kasi for aesthetic purposes and hp gains due to the custom design and the tubing. K&N and APEXI is good but Simota will do well also cheaper price good quality but K&N is still the leading brand. K&N na standard cone is usually 2.8K-3.5K depending on the design simota you can get 600php-1k. What I noticed about K&N gives the engine more bass in terms of sound it changes the sound of the engine at certain RPM