Hmmm, I was wondering about this. I also have Sportlines and I only have one of those NAPA rear camber kits and it works fine. But my fronts are kinda out of spec, like its at -1.2 on the right and -0.9 on the left. Now, I recently rotated my tires and the insides of my right front is starting to wear faster than all the other tires. So, I was wondering what u guys did to ur front camber. I only put on the RRE front camber kit, which is good for the prokits, like about a degree of correction. Mine was still out of spec tho. So, any other camber kits out there and how much are they? I don't wanna burn through tires every now and then. But so far, I've had the tires for 10K miles and they're still looking good. The tires have been on the drop for around 8K miles or so.