I have been wondering the same thing....I am putting in a set of Wilwoods on the front, and the shields I have won't fit right....I was planning on cutting them them to fit, but is it worth the hassle?
They will keep your rotors and pads free-er from dust, road grime and water so they are nice and clean when required. ..and they'll last longer as a result too.
They may cause your pads to run slightly warmer, but personally I see this as a good thing as pads need to maintain temperature to work better anyway, -especially if you're using high performance pads with lots of metal in them.. Hi-perf pads are crap when they're cold.
Most of the cooling air is pulled from the hub through to the parimeter of the rotor anyway, so I see any additional cooling from their removal as insignifcant.
I think the OEs would have left them off if they weren't any advantage.
I pulled mine off while I was trying to eliminate noise from the front end (turned out to be the Speed Tech control arms grinding a deep groove in my OEM rotors). I have not had any problems since the removal of the shields.
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