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NEW observation after 150 miles of use - engine runs cooler and steady at 180F. With old "system" temps climbed when stuck in traffic - towards 240F. It's anecodtal - but I think the M&K no heat headers allow more efficient cooling of the engine. Real or? Anyone else observe this?
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74 911 3.2
Last edited by shawn908; 08-10-2020 at 03:22 AM..
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