I could be wrong, but a lot of intake pipes have a hollow 'swirl chamber' (for want of a better description) to reduce the amount of intake noise.
That is what I think the 'lump' is in this case ?
In Subaru world, we remove the intake 'silencer' for more induction noise and so that you can hear the turbo !
In need a bigger picture to see properly, but you could potentially replace the MAF to throttle body section of the hose with a piece of flexible ducting in the correct diameter ?
Should give you slightly better airflow and a slightly sportier induction noise ?
I would want to use something with a reasonably thick wall but flexible enough to bend to shape.
Tried a 4" silicone pipe as a cold air feed to an enclosed cone filter on one of my Imprezas but the silicone pipe was too 'rigid' to bend where I wanted it to go, ended up using a wire reinforced 4" ducting pipe instead.