Recently buy a used S2000. I work to realize a good tune-up. The OEM air filter is very dirty and want to change. In this moment not want CAI.

What is the best (HP/TQ gain, dyno proven) direct replacement air filter?:
1. OEM Honda
2. Comptech
3. Spoon
4. K&N
5. Speed
6. Other

Thanks

 

JR filters=2-3-HP.

 

Unless you make major changes to your intake, selecting a replacement filter purely for HP gain is almost comical. Even the reported 2 - 3 HP gain of a JR (which I've used myself) is within the error (background noise) of any dyno. Choose your filter on the basis of re-usability, ease of procurement, price and on if you like its pretty color.