The PTP seems to be the best on the market right now and you certainly pay a good price for it but its worth it. My downpipe is ceramic coated and so I have yet to wrap it but I have not had the same issues as the OP. I just like to read to see if i can help or if something happens in the future. When I got the car I replaced all the coils, plugs, and plug boots. I will say the massive heat of the turbo so close to the plug boots and coils can and will eventually cause issues. I noticed not only were the boots insanely a PITA to get off but 2 were cracked and damaged. I added some extra heat protection and some anti-seize to hopefully make it easier to remove in the future. I would recommend a 30K replacement of the boots if you want to stay in top notch shape.
Currently Im running the Alpha downpipe, 3 inch midpipe to the AMG exhaust, Mishimoto intake, Pure 550 turbo, AMS hpfp, and custom tuned with HP tuners. Making round 30PSI limit with the crap gas we have round here but i do have a 36PSI tune I can load if I fill it with 100 octane.
Currently Im running the Alpha downpipe, 3 inch midpipe to the AMG exhaust, Mishimoto intake, Pure 550 turbo, AMS hpfp, and custom tuned with HP tuners. Making round 30PSI limit with the crap gas we have round here but i do have a 36PSI tune I can load if I fill it with 100 octane.