Hi, just wondering if the Tsumura ZR2 .325 pitch would fit on my Husqvarna 445 X-Torque. The specs seem to match up but I dont see it on the list of chainsaws applicable with the bar.

The ZR2 will fit your 445.  Tsumura does not give us a big list of models it fits.  However this is all the Husqvarna models these bars fit:

Electric 16, 40, 42, 44, 45, 49, 50, 51, 55, 55 Rancher, 154, 234, 238, 240, 242, 242XP, 246, 254,
254XP, 257, 261, 262, 262XP, 335, 336, 338XPT, 339XP, 340, 345, 346XP, 346XP E-TECH, 346GP, 346XPG, 350, 351,
353, 353 E-TECH, 353G E-TECH, 357XP, 357XPG, 359, 359 E-TECH, 362, 362XP, 435, 435E, 440E, 444, 445, 445E, 450,
450E, 455, 455E RANCHER, 455 RANCHER, 460, 460 RANCHER, T540, 543XP, 545, 550XP, 550XPG, 555, 560XP,
560XPG