I sell more quaife than gripper diffs but on track I believe the gripper is better on a road car I would recommend a quaife over the plated gripper. On my iphone at the moment so full replies are tedious! I'll do a proper reply when I get on my pc laterBeacuse you supply them or for a technical reason? How do they differ from the quaife? A diff is on the shopping list for our race car this winter
This thread seems pretty useful, page 4 is pretty good. Also page 2 (i think) explains that you need to mod a drive shaft to fit the gripper, but it is all explained in the thread I think. Hope this has helped.
http://www.cliosport.net/forum/showthread.php?461083-Gripper-LSD-Group-Buy/page4&highlight=quaife
No need to mod the shaft anymore on the gripper