ive been puzzled ever since i put on my aam test pipes paired up with my nismo exhaust. if just rev my engine and on the down throttle right around the 1500 rpm mark there is like a metal type whistle that annoys the **** out of me. i understand there is rasp but that doesnt bother me when i get on it, but a buddy of mine said its normal but ive never heard anyone else's car on here do it. the only thing that i can think of is that i am still using the factory y pipe. any info would be greatly appreciated.

 

i have it too, and i hate it. how bout some resonated test pipes ? AAM ya hear ?

 

They make them for the HR now?

 

no, but they need to...

 

Sounds normal to me. I've heard that sound on many other cars as well.