The best replacement for injen is aem.

The best alternatives to injen are rated as following:
★★★★★  aem
★★★  fujita
★★★  k&n
★★  aem intake
★★  takeda
★★  weapon r
★  afe
★  aem cold air intake
★  k&n cold air intake
★  afe intake
★  aem v2
★  volant
★  k&n intake
★  takeda intake
★  airaid
★  k&n air intakes
  stillen
  gruppe m
  aem cai
  fujita intake
  jwt
  nameless
  apexi
  secret weapon
  berk
  v2
  aem intakes
  k n
  bms dci

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injen
aem
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