I realize my evo 5 dont have a knock sensor, so my question is what i should buy? I have a aem series 2 (evo 8) is better go with OEM knock sensor or buy a knock link g4? or both?? I really dont know to much about it and a few people told me diferents opinions.

Thanks a lot!

 

OEM knock sensor should work with the AEM ECU

 

i can configure with the aem if in any moment i have knock can shoot me an alert or light?? like the check engine or something??

 

I don't think that such feature is available on the AEM EMS.
The CEL/knock is available on the stock ecu through Ceddy's rom (evo 5/6) or Tephra roms (evo 7/8/9).
Or you could buy a knock box that has a knock alarm feature, I think turbo xs offers such box.

 

As in one isn't installed, or you think that your car didn't come with one from the factory? If the latter, it does, and it's located underneath your intake manifold.

Either way, I would go with the OEM sensor for daily driving detonation detection as its been tried and tested, and just have your tuner rock a set of det cans while tuning if you're worried about phantom knock