Unfortunately, it looks like the Flowmaster Slimlines have been discontinued. I was hoping to use the 30 inch ones (13530320) but was waiting to buy them until I was ready for that part of the build. When I first heard about this a couple weeks ago, I managed to find one of the 30 inch ones on Amazon and bought the last two 24 inch ones from Flowmaster (13524320). I've tried calling about 100 places that say they have the 30 inch ones online and have checked ebay, but I keep striking out. This brings me to my questions. Anyone have a clue if it is possible to join the two 24 inch mufflers into a 30 inch one? I assume that there would be an unsightly weld seam, but I'm also concerned that the internals wouldn't work correctly. Any ideas on where I can find an extra one lying around? I suppose I could just use the 24 inch ones, but from my review of the forums it sounds like they are just as loud as the stock pipes. Thanks for any suggestions...