high pressure fuel pump

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  1. Twisted Tuning

    Twisted Tuning N54/N55 HPFP R&D.....

    Decided to take a crack at coming up with possible fixes of the failures for the N54/Early N55 HPFP's and possible upgrades and we all know they are needed for these cars. This will be a project I work on in the side, but through the tear down process is shows a lot and answers a few questions...
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