I’m getting a fluttering/leak noise upon both accel and decel. Mostly noticeable around 1.5-3k. Sounds like a diesel.

I’ve checked for intake and exhaust leaks and everything seems to be in order. I think it’s coming from the front half of the car. Please help me! It’s been bugging me for a while now.

Mods: Takeda CAI, ART pipes, Stillen catback

note that these mods have been on the car for months now and this problem surfaced within the past few weeks

Here’s what it sounds like: