Form what Ive read this is what I gather:

Ingalls, sprint etc will do the job. havent heard anything negative about these except that the bushings are rubber.

Skunk 2 is maybe the best. Only problem is that small adjustment screws which hold the unit in place can apparently move. King motorsports kit is just a rebadged skunk 2.

I would get the ingalls one if you dont car about the bushings. This is just what I have read on various boards not my personal experience. For the back dont bother with a kit. Just get washers.