One more mod before my tune?
 

Ok last weekend I added NST pulley kit and the Z1 intake manifold. I'm scheduled for a retune On the 8th of Oct. I'm wanting to swap out my final drive to the 3.692. Should I add this then tune or could I add this gear swap mod with out tuning?

One more mod before my tune?
 

Shouldn't you be looking at the 4.10(?) gears? Isn't 3.692 going the wrong direction?

Gears shouldn't make a difference on the quality of the tune, but it will affect the final numbers a little.

3.6 will be a good improvement over the stock 3.3. 4.+ May be more that I bargain for. I've been taking my Z on long trips too.

I really wish I knew others close by with gear mods so I could see the difference first hand