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I am kind of surprised a catless dp doesn't free up more power on n55 cars. After I read your post, I did some research and found gains are a bit more modest than on n54 cars. The newer engines must have a better factory dp.
So I can live without the massive FBO dyno figures by going n55. Obviously on the street I want the most fun power I can have. But on the track I want some thing that can deliver consistency. I can't work on chassis setup and my driving if the car goes into limp mode or pulls a bunch of power. The more I read the more I am more likely to trade the FBO power of the n54 and go with consistency and reliability of the n55.
At this point the car, condition, mileage, options etc. will trump engine choice, when I buy.
Thanks!
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