Just installed DP, Now a question.

[sinner]

My thought is leave it be. The flutter is common, and won't hurt anything. Heat wrap your downpipe.

[SWFL Scooby]

It's not compressor surge- this is only heard when you lift off the gas, not before going under boost.

[digitalmonk]

Originally Posted by Wilks132

anyone have any thoughts on this? the flutter occurs in the vacuum right before it starts to boost in second. I want to make sure its wg flutter and not compressor surge. like I said I don't think its a leak cause I don't hear it while reving the car in neutral or in first.

That line is the key. It's flutter. Once you're in boost you shouldn't hear it any more.
It's normal to hear it more with an upgraded downpipe.