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  1. 2

    how much do 4.10's differ from 3.73's?

    Look at the tag on your rear end. It will tell you what gear ratio you have. Go for the FRPP 4.10a gears. Any whining you get is due to a bad install not the gears.
  2. 2

    Adding Sirius to Shaker 500 / Speakers

    See this link: http://oem-auto-accessory.com/visteon_sirius_kit_for_new_style_ford_radios_with_aux_button.html Hope this helps...
  3. 2

    cai and tuner problem

    I had my car dyno tuned with my Roush CAI and my gas mileage went up about the amount yours went down. The tuner told me this was typical for this mod.