problem with 2004 sentra

I have a 2004 Nissan Sentra with about 30k miles on it and everytime the rpms are from 2-3 thousand it makes a funny noise in the rear of the car in the exhaust....anyone farmiliar with this problem?

i had a familiar problem with my 2001 sentra se. all i did to get rid of it i guess was to do the brake/gas launch and turn off overdrive...it went away and my check engine light also went off... try driving by flooring it for awhile, if that doesn't help, maybe someone stuck somethin in your muffler...

i never had the problem with my 01 se.. but i cant turn off my over drive cuz mine is a 5spd

dude....honestly, dont bring up old threads. cheack the date. this was in 11-29-05. u posted in about a 7 month old thread.

if its a spec its due to the cam adjustment/intake adjustment made by the cvtc, catless headers will make it more pronounced, like in my car ;)