smokatoke

I found an old thread talking about S-DAIS and valves opening at various RPMs to allow more air intake. I am hearing a squeal sound around 6000 rpm as well as 7500+rpm... Anyone else hear a sound at these RPMs or can verify the S-DAIS would create this kind of sound? I have a month left under the 3 year portion of my warranty so I am going to take it in regardless.