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Titansteel Bars
Twelve Titansteel Bars are required to craft the Mechano-Hog mount. Titansteel Bars can be crafted by miners, requiring three Titanium Bars, one Eternal Fire, one Eternal Shadow and one Eternal Earth as reagents for each bar. Additionally, skilled engineers may rarely be able to obtain some Titansteel Bars by salvaging the corpses of Flame Leviathan, XT-002 Deconstructor and Leviathan Mk II, the three mechanical bosses in the Ulduar raid.
Handfuls of Cobalt Bolts
Forty Handfuls of Cobalt Bolts, crafted by engineers, are required to craft the Mechano-Hog mount. Each Handful of Cobalt Bolts requires two Cobalt Bars as reagents. Additionally, skilled engineers may be able to obtain some Handfuls of Cobalt Bolts by salvaging the corpses of various mechanical creatures in "Wrath of the Lich King" zones, including the same three mechanical bosses in Ulduar.
Arctic Furs
Two Arctic Furs are required to craft the Mechano-Hog mount. Arctic Fur can rarely be found while skinning creatures in "Wrath of the Lich King" zones. Additionally, they may be purchased for 10 Heavy Borean Leathers each from Braeg Stoutbeard, the fur and leather trader located outside the leatherworking store in Dalaran.
Motorbike Parts
Eight Goblin-Machined Pistons, one Elementium-Plated Exhaust Pipe and one Salvaged Iron Golem Parts are required to craft the Mechano-Hog mount. All of these items can be purchased from Roxi Ramrocket in K3, in the Storm Peaks zone, by a skilled engineer who has already learned the Mechano-Hog or Mekgineer's Chopper pattern. The total cost of purchasing these parts is 12,500 gold, although it may be reduced to 11,250 gold if the engineer is in a guild of at least Level 24 through the Bartering guild perk. Additionally, a skilled engineer may very rarely be able to obtain some of these parts by salvaging the corpses of the three mechanical bosses in Ulduar.