24v Swap Hissing sound

[yahh]

My s50 seems to make some kind of "tssssssss" sound after I let off the gas.You can hear it after the revs, it's a lot more noticeable in person. Any ideas?

[berlow94]

headers? sounds like plain back pressure (or lack there of) to me.

[yahh]

It's just headers and y pipe. Will report back once the entire exhaust is on. It just kind of sounds like an electrical cut so that's why i was worried.