well i actually used one in the mugan mtx 3. it let you get off the corner better it gives you a little better stearing at high speeds. but it will create a low speed push. it makes your car more stable because of the loose diff. but getting the diff to work the way you would like is a hit and miss thing. you have to find what works best for you. but the negative diff is a diff with a clutch that turns it into a straight axil. it took me about three different greases before i found one that i liked.