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Delta camshafts are the guys I used for my XFI regrind, seems to be a good company.... I hope I get the 15-20 mpg increase they said they betted I would see bahahahahahah!! I would use them again. Figured you can do it on a metro, then others engines should be close to the same...
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1993 Geo Metro- 361k on original drivetrain minus head. Best mpg of 75.23. Grille block,mirror delete, kammback, fender skirts, and 135-80-15 tires..... Oh and alot of Hypermiling techniques.
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