Autobahn Reliability
^ Thats good using the brakes at high speeds leads to brake fade very quick then you can't stop.
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As was said already, sustaining that kind of speed for any length of time would make me very concerned about engine oil, transmission fluid, and rear diff temperatures.
About the engine heating up going that fast i would try to beef up the front air-dam a little since it is probably flexing quite a bit at those speeds and not allowing full air-flow to the radiator. Not only that but the coolant temp staying at reasonable temps also helps control oil temps and vice versa
Suspension wise, all new bushings, tie rods, etc. first. Then Koni shocks and Strano springs would be next. This alone will make a drastic change in how controlled the car is. A pair of 35 front/21 rear sway bars will help as well.
Brakes, I would DEFINITELY upgrade to C5 brakes, the stock LT1 brakes are pathetic to put it nicely.
Power wise, I agree with everyone else's suggestion, get a heads/cam setup from either Lloyd Elliot or Advanced Induction and you will push over 400-420rwhp, with a custom 396 setup, many are pushing 475+rwhp as well.
btw the car has 100k miles.
oh i almost forgot what is the top speed of a 6 speed LT1 lol









