iceweasel

In the video below at 28-42 seconds the car revs and decel and you can hear a high pitch whine/spool. Is this normal for all exhaust for the rc 350? I currently have a muffler delete but it's starting to bug the **** out of me. I thought it was a leak but I went back to my shop to check and they found none. I found this clip below and it has the same high pitch noise. Maybe this is normal for a lexus v6? I never heard this high pitch whine/spool in any other cars I sat in with exhausts m4, s2k, evo 8...

deth4rice

I'm pretty sure that's just the way our cars sound when downshifting/decelerating? I have the ARK exhaust and I can still hear that type of noise slightly when I drive in manual and downshift except I get the nice pops on downshift too which I like hearing personally.

I'm not very car savvy so I can't give a better answer sorry but I'm pretty sure that sound is normal for our cars.