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Left: 15" FFR Halibrand style. Right 17" FFR Halibrand Style
Performance Modifications
The following modifications and set-ups fall under the category of getting more horsepower from your engine
and making your car perform better. You will find a hundred people a day that will tell you what you've got to
have. We just want to start you out with the easy modifications that net large returns without large cash outlays
or serious changes to the stock motor and drive train. Remember that a 2,300 lb. car stresses the parts less than a
3,100 lb. Mustang does, so all of the components will last longer and can take more abuse than they did on the
Mustang. Check out
www.factoryfive.com
to see what we offer.
Gears
The Mustang 5.0 manual transmission car comes with either 2.73 or 3.08 rear end gear ratios from the factory.
If you can get a rear from an automatic car it will have 3.27 gears. There is an ID tag on the rear differential. If
you find that your rear end is missing its ID tag, there is a good chance that the rear end was modified. To find
out what ratio is on the differential, mark the pinion and axle at a start point. Turn the axle exactly one rotation
and count the number of rotations that the pinion makes compared to the reference mark. For example: 3 ½
528
www.factoryfive.com
508-291-3443
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