Careful what you buy, a lot of those things are useless without a lonestar or similar swingarm that uses a honda-style carrier instead of the stock style one that mounts on tabs. Both of those are showing a picture of a honda style which is no good for you, the pictures may not be of the actual item they're selling though.
There are plenty of things that are much more worthwhile of an investment than that, especially on a raptor 350. The stock bearing carrier is fine, if you do the simple grease zerk mod the bearings will easily last 10 or 15 years of hard riding with no maintenance other than a pump of grease every once in a while.