So I'm looking at a DPF delete kit for my 2012 Jetta Sportwagen, and the two names I hear tossed around the most are Darkside Developments and Rawtek. Looking at the Rawtek kit, it's like $1200 (if I want to keep my catalytic converter, which I do). The Darkside equivalent is a shorter section of pipe, meaning I can theoretically just keep my OEM cat in place. This Darkside kit is $500. What's up with this huge price disparity? Am I even looking at the right product for my car? I'm just shocked that two seemingly-identical products can have such a huge price gap, and I'm wondering if I'm missing something about compatibility, quality, etc.