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The largest appeal of the shield is to deflect heat from the ball joints at the bottom of the rotors. Outside of that it just prevents dirt from getting between the caliper and the rotor. On my Mustang I had a Ford Racing cooling shield which basically just covered the ball joint and the small area in front of the caliper. The rest of the rotor was exposed for extra air.
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2017 BMW M2 German Spec
6MT, Driver's Package --> SOLD
2018 Camaro SS 1LE. Because race car!
"Redline a day keeps the mechanics away"
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