Goat format ruling
Y-Dragon Head

Card effect (current official text)Once per turn, you can either: Target 1 "X-Head Cannon" you control; equip this card to that target, OR: Unequip this card and Special Summon it. A monster equipped with this card gains 400 ATK/DEF, also if the equipped monster would be destroyed by battle or card effect, destroy this card instead.
Rulings
- If Y-Dragon Head's ATK is doubled with Limiter Removal, and then Y-Dragon Head is equipped to X-Head Cannon, Y-Dragon Head is not destroyed at the end of the turn.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Goat forum — sourced change requests get reviewed.