I'm jealous of FI owners tuned to over 500 whp. Granted, 400-450 whp is more than enough to shred meaty tires. My car is so much more fun to drive now after replacing the brake switch and slightly tightening the manual boost controller (1/8th turn).
As for longevity, my car is daily driven. My friends asked me to track it, but I prefer not to since this is a daily driver setup - not a bulletproof track setup. My car had about 22k miles when the turbos were installed, and it is marching towards 49k miles. Sometimes I wonder if the engine will outlast the turbos.
