they should test the cam's on the S/C Xterra. Actually they should test all of it on a S/C Xterra. I sure all those upgrades with a smaller pulley would give a S/C Xterra 300 hp, dontcha think? And why don't they make headers that are street legal?

And whats a lifter? On the camshaft section, it says new lifters will be needed.

This is why I wish I knew about mechanical things in cars... Frustratin cause I want to mess around with the Xterra (cause it's the best way to learn) but it seems that barely anything is out.