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No I do not think it was upgraded. From my understanding, and I am sure the experts will chime in, but Porsche continued the design for several more years. You need to look at Flat 6 innovations or LN engineering. My guess is you do not have an upgraded IMS bearing.
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2001 Boxster S Lapis Blue
TS Cat Bypass Pipes and exhaust
iPad Mini Dash Install
DEPO Tail Lights
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