The "S" tips WILL clamp on to the right side. On the left side, it's just a pressure fit where the tip just sits tight against the left cupped pipe on the PSE tips. The "S" tips fall like 1/2" short of a tight fit. It's pretty idiotic that Porsche designed it like this. The only reason being a reason to buy new tips. The tips are exactly the same except for this slight shortage. The PSE tips also have a more polished finish.