Quote:
Originally Posted by 370Z JT
I couldn't believe a rattling sound is part of the break in process either but I guess Motordyne knows their products.
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At least for this fiberglass, the 1500 mile break in process is such that the fiberglass goes from semi soft, to a solid mass and then back to soft and fluffy again. Its due to the silica binder being used to keep the fibers under control during manufacturing and handling.