This should be the same 'fuse' commonly found on AWD kit without the T/X.
I often times see new drivers with this thing on their AWD xspeeds, only to find their cars stop in the middle of the track due to over-current. I would strongly recommend to try removing this part to gain higher performance, especially if you want to upgrade your fets.
For cap, PN do offer two different types of cap, and one will see decent performance gain with the new large 'flat' cap. The upside will be more obvious towards the end, when use with battery that will drop Volt soon after the first few minutes.
As said earlier la, that is a 'fuse' but not a noise capacity (like 103 or 104), and definitely not a large capacity which is used to provide more punch. In fact, I would bet that if you remove that thing, you might see a performance gain tim....
