the added traction in rain/snow is worth it alone to me. the extra traction when exiting a corner is a bonus. i am saving cash for one now. first "performance mod" i will do to my car
sorry no subsatute for the best. my father and i run a performance shop and have delt with quaife quite a bit. true Mfactory is a good LSD but their is no way you can put Mfactory against a quaife LSD. i guess their are no more hardcore racer's out their anymore that can see spending 1200 on a quaife LSD. and yes 1200 in cludes the bolts.
id rather save the ~1k bucks (i do not co own a distributor so i have to pay full price just like 99% of other MSP owners) and buy a larger turbo, better EMS, better gearset... (not saying i can get all that with 1k, its more of a this or that list) the list could go on.. the amount of difference between the two does not justify it in the least...