Do I need a hood pin or latch kit to go with this hinge?

Not necessarily. This hinge works with your factory latch and existing pins. If your latch is damaged or worn, you may want to service it separately — but the hinge alone handles the hinging action.

Will my hood seal and weatherstripping still fit after installing this?

Yes. Since this hinge mounts at factory points and maintains OEM geometry, your hood seal and rubber weatherstripping will align as they did originally — no trimming or repositioning needed.

Is this noticeably heavier or lighter than the factory hinge?

Built to match factory specifications, so you won't notice a difference in hood weight or operation. If weight savings matter to your build, a carbon fiber hood would be a better move than a lighter hinge.