Yea. 99.5+ R50's have switched to the 3.5L from 2001-2004. 99.5+-2000 still had the 3.3L. They come with a crappy bose sound system. As you may know some come with a lever 4x4 and some with a knob all-mode 4x4. If you're more serious about 4wheeling, try to go with the lever. I have the knob but no complaints so far. Cool thing about the newer r50's is that you can hold the unlock button and the windows roll down. haha. Also, if you're planning on the AC lift again, you are a lil taller than the 96-99. I compared my lift to XplorX4's lift with 32's, I sat a lil higher than his with 30's. Common problem is the power screws but still an easy fix. Other than that, its mostly about the power. The 240 horses are farking aweseome!