Air filter upgrades for Almera
 

Hi i have a 1.4 16v Almera and i want to get more bhp out of it, i was going to put an air filter in but i don't know which type to put in, should I get a replacement elements or intake hit? seen on:

http://www.roadrunnermotorsport.co.u...andnprices.asp

Also if you have anymore low budget ideas to give my car more bhp it would be very helpful thanks :)