Its probably not for heat reflection, but rather why the glue seperated, sounds like the material degraded and that is why it fell. The reason for the sand like material is that the glue is still there holding part of the degraded material up still.
ATX MTX swap, rear drum disc swap, drilled rotors, ported intake, optim throttle body, CAI, 7.5L MAF, adj. fuel regulator, longtube headers, underdrive pulley, no EGR, low inpedence bigger injectors, 2002 Focus Swap
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