The 05 Track and all of the 06's have Nissan's "rev-up" version of the VQ35DE, which gives it 300hp. All previous years, and the rest of the 05's got the standard motor that makes 287hp. This is unrelated to Nissan's new HR or High Rev motor, which will make 307hp, and probably more in the future. The HR is completely different inside and out from all other previous VQ's. The "rev-up" VQ just has a different manifold, cams, dual VTC, and a bunch of revised small bits.

spoolinspyder, if you didn't catch all of that, just reread it without the punctuation j/k