I got a much smoother ride with mine off, I drove it for a few months that way before I out on the Wevo mounts, you will notice a difference, just use caution on those 80MPh exit ramps. 
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78’ SC 911 Targa - 3.2SS, PMO 46, M&K 2/2 1 5/8” HEADERS, 123 DIST, PORTERFIELD R4-S PADS, KR75 CAMS, REBEL RACING BUSHINGS, KONI CLASSICS
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