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No power gain from Underdrive Pulley?...
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01-18-2017, 10:50 AM
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Boxtaboy
07 Carrera S Cab
Join Date: Nov 2005
Location: New Jersey
Posts: 2,273
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2001 Porsche Boxster
2007 Carrera S Cabriolet
I don't doubt that statement. Years ago, I actually had a water pump failure right after I had redlined my engine during some spirited driving.
What I find amusing is the sellers of these UDPs claiming instant 5-10hp gains.
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