Ok, after reading the forum for a couple months and finally getting the mods done on my car I decided to hit the most lacking thing I think I have ever heard of, the stock system in my car.. So after much research here it goes, what do ya'll think?
HU - Sony ESCDX - M670
2 pr Boston Acoustic RC820 - 5x7s with tweet
3 JL W6 10's
MTX Thunder 6500D (subs)
MTX RT4340 for the seps

Now the question is I want to install this myself, and after reading many many months of the forum I pretty much got a very good idea on how to set it all up, I just want to know the MTX Thunder 6500D is rated I believe at 250 x 1 at 4 ohms. It is rated at 500 x 1 at 2 ohms.. Question is how do I lower the ohm rating down to 2 ohms?

1998 Black SVT
no res
Borla exhaust
K & N Filter
Eibach springs
20% tint all around
new engine at 42,000 w/ 12,000 on the new 00 motor