rack and pinion what's the difference between these??

less turns to lock=quicker steering response.

Not necessarily. The ratio is what determines steering response, and the ratio on the 3.0 is 20:1, whereas the 2.25 and 2.5 are both 15:1. The only difference between the 2.25 and the 2.5 is you can't turn the 2.25 as far before it hits its limits. They both turn the wheels just as fast.
 
Not necessarily. The ratio is what determines steering response, and the ratio on the 3.0 is 20:1, whereas the 2.25 and 2.5 are both 15:1. The only difference between the 2.25 and the 2.5 is you can't turn the 2.25 as far before it hits its limits. They both turn the wheels just as fast.

makes sense