Original Style Differential Area Underlayment for 1965-1970 Mustang Fastbacks.If you are working on an interior restoration, you really should invest in carpet underlayment. Differential area underlayment is highly effective as a sound deadener, temperature barrier and vibration dampener.
This original style, Mustang differential area underlayment covers the area between the rear seat and trunk underlayment, directly over the differential. Die cut to fit perfectly. Also features an asphalt layer with needled cotton backing, just like the original underlayment.
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