hey guys im looking again for a new upgrade and am stumped. I have a cold air intake and the mac dual exhaust kit form AM. I still have my 4.10's to go in just havent found someone to do it with out spending $$$ but i am currently looking at a SCT flash tuner are they worth it for my 3.8l auto? i see that it gives you 10 horse power and you shift points but is it really worth the money will i see that big of a difference??