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I recently recieved some information from this company. They have a chip for the e39 M5 engine they claim will significantly raise both the horsepower and torque of the engine...Does anyone have any experience with this company?
 

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This is interesting. Here's a quote from the Dinan page concerning engine tuning for the M5:

Congratulations to BMW's engineers! For the first time in nearly 20 years, BMW has provided the driving enthusiast all of the power that can be mustered as a result of engine management tuning. BMW's sophisticated detonation control systems and high speed engine management computers have left no horsepower for we tuners to extract; as much as we hate to admit it.

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Not bad, approximately 420hp.

Do these things come with the computer or is it just for the software
 
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