Im new to this forum.I have a few questions to the car experts here.I am driving a Proton Satria 1.3i Year 2000 model.I have never modified this car in any way for performance.I need some advise on what I am about to do.I am planning to first change my air filter to a K&N filter.But im not sure on what must I look for.I normally see they have 3" , 6" etc.What size will fit my car?And what is the difference between an ORIGINAL air filter & the "pirated" K&N air filter?I am currently...
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