Weird exhaust noise
 

Just noticed a weird noise yesterday. It's the exact same noise this guys' car is making in this video. https://m.youtube.com/watch?v=uJ6hIWq1ggU I would've uploaded my own video but it doesn't accept .MOV I guess lol but anyway any of you guys experience this?

Do you have (what's the word I am searching for) HFC'S?

http://www.the370z.com/intake-exhaus...air-noise.html

http://www.the370z.com/intake-exhaus...when-cold.html

http://www.the370z.com/intake-exhaus...ing-sound.html

http://www.the370z.com/intake-exhaus...st-normal.html

http://www.the370z.com/intake-exhaus...t-hissing.html

http://www.the370z.com/intake-exhaus...st-system.html

As far as I know I'm all stock. I bought the car used but I didn't think the exhaust was aftermarket

I bought my Z used too and knew it had an aftermarket catback... after I got it on the lift I found the previous owner also gifted me front/rear SPC camber arms.

I think this means I need to jack up my Z and check underneath it and see if I have any gifts to.