this is normal, you'll hear it on any NA car around 4.5k rpms + with a k&n and such, but since the turbo is pulling in so much air, you'll hear it much sooner with an aftermarket filter ona turbo car. The flutter is from the wastegate. To fix this get a boost controller (with mbc it will just shut the wastegate off til set boost, and with ebc you can program when the wastegate opens). i know the turbo xs HPBC i have for sale fixes this. All you hear is the turbo spool up and then silence no flutter or anything. No recoil either like 100% vent AM bovs.04_WRX_STi said:Hi. I have a prob. I just installed my AEM Short ram intake, and it is super loud. It makes a shhhhhhhhh sound when i step on it, and then a fluttering sound when i take my foot off. The shhhhhh sound is REALLY loud. Is this normal????
Yes a short ram is better for performance on a turbo car. The best intake I have ever tested is the Blitz SUS intake. I have seen many bad intakes that cause wierd fluctuation in the AF chart on the dyno. Cold airs are the worst though.04_WRX_STi said:So the shortram should have more affect on performance then the CAI.