everybody talks about how good the T-lok is what is the T-lok system what does it do and how much does it cost?

t-lok is a limited slip differential that puts power to both rear wheels rather than only one like the open differential that comes standard on our sixers. the gt's come standard with a "t-lok". it improves traction and acceleration since both wheels are now grabbing the pavement instead of only one. look up limited slip differential vs. open diff on wikipedia or "how stuff works" for a clearer understanding.

http://www.v6mustangstuff.com/05Drivetrain.htm

for the second part of your question. 200 bucks.

The third answer is a new 8.8 inch rear end with the T-Loc installed
and whatever OEM gears you would like.
www.newtakeoff.com (http://www.newtakeoff.com)