I found these which are basically the same as I have now, but 1.4 inches shorter so they will sit in further:

03-08 07 06 05 04 2003 2008 EXHAUST TIP porsche CAYENNE

I haven't been able to find the GTS tips online yet, but Im betting they are a few hundred $'s just because I had a cayenne-s, and everything for porsche is over priced. I do like the dual wall, but I haven't found any that slant down like the oem's.

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BGReddy00

09 X5 3.0 | 214 Style Powdercoated Black Wheels | Painted Moldings - Bumpers | Fender Extensions | 5% Lumar Tint | Black Kidneys | Quad Exhaust Tips