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480 Posts
Discussion Starter · #1 ·
I'm getting my car mapped for the first time (during my ownership) and would like some feedback on air filters.

Currently I have the two HKS mushroom style ones with new elements in. These also have all the siler induction piping by HKS etc.

But these seem (in radius) smaller than my friends HKS filters and the Apexi ones seem even bigger?

Are mine taller so pass the same level of air through or do I need to upgrade these further to the Apexi or Blitz ones?
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