Smoke usually comes down to VSS, Blown turbos, or a bad headgasket. When my VSS went bad it smoked at idle at a light, then would stop smoking as much when driving off. In order to get to the heads to replace the VSS you would have to take off much of 60k parts, so makes sense to go ahead and do that at same time, just provide the parts to the shop you take it to. However, you should read up on blown turbos as they smoke too, it could be either, and both repairs cost over 1200, VSS cost me 1200 when I did it. I did new turbos when I replaced my engine.
They fit great. Just barely clears the front calipers. Ive had them with both tein springs and coilovers (which is what im running) and they rarelyyyy rub. And yeah thats the size. Good luck finding a set.