I just installed KKM + Miks heat shield in a '99 SVT. Performance is improved and there's a little more rumble, in general, but there's also a high-pitched whine on acceleration.

**Is this normal?**

If it is normal, the pros outweigh the con (i.e., the whine). If it's not normal, any idea what I did wrong?

Steve
1999 Tropic Green SVT
#2434 of 2760
KKM w/ heat shield
SHO Y-pipe
Borla cat-back (rumble, rumble)
Unexplained RPM hang