All good stuff here. Keys are good kit, good install (including heat management), good tune and the correct fuel.
I'm three years plus on my kit and no serious issues. I chased down some minor oil leaks for awhile but I rebuilt all AN lined from scratch myself and haven't had an issues since.
I recommend DIY if you have the skills. It's going to put you leaps and bounds ahead during troubleshooting if you installed the kit.
Short story long, if you have a good kit and maintain it properly, you should have a car that lasts a long time.
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