Slight buzz at 1,500 RPM
 

Hey guys, I've had my Greddy SP Elite installed for maybe 2 months now. Ever since the install I've heard a very slight buzz right then the car goes passed 1,500 rpms. I can hold the RPMs right at 1,500 and hear the buzz. What should I check for?
I'm sure it's a simple issue, but I'm not one for tackling something I know nothing about. Thanks!

resonance from your exhaust is the most likely cause.

That's what I figured. Just curious if that something normal when you get aftermarket exhaust or if something is loose.

It's just vibrating and hitting something on the bottom of the car. My Evo3 has the same vibration at 1.5K RPM - nothing to be worried about to be honest, it sounds blah, but no damage is being done. Next time you jack it up, just make sure everything has enough clearance and pull any pipes farther downward to make sure nothing is even close to touching.

I have the greddy SP elite since 3 months and all is perfect, maybe a little bit drone at 1.400rpm but nothing important

Is it more like a rattle than a buzz? if so, I second no1r above. I had that problem on my truck. Piping was hitting the bottom of the truck and rattling. Just had to loosen it up and shift the pipes a bit.