Every necessary part to ensure longevity but the main components?
You are the 1 in 100 or 10000 people who seems to not have any issues at all running one of these. But heres a different thing to consider.
I close my eyes and walk across a busy intersection and dont get hit by a car. Does it mean its safe to keep doing it? Not at all.
The thing is, I can build a quality kit, to put on a car all said done and tuned for $2500 depending on how hard I search. Which is ridiculously cheap.
and if put side by side with a godspeed kit, or any other ebay kit, im positive it will not only last longer, but perform better, and look better at the same time.