I tested a 4 dollar solution ... Went to Home Depot and bought some Owens corning insulafoam. It comes in 1/2 and 3/4 sheets. I traced out the cargo mat and cut it out. I put the cargo mat on top. It weighs about a pound or so. Dropped from avg 89 to 87 going 70 down interstate in 6th gear. Standard Z.
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09 6MT MB: Int/Ext LEDs, Stillen G3 + FI test pipes + FI cat back + Stillen sways + Clutch Helper Spring
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