Thread: 1990 Geo Metro Engine & Parts - Singh Grooved Head
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Old 08-15-2018, 12:45 PM   #5 (permalink)
19bonestock88
Master EcoModder
 
Join Date: Jun 2016
Location: KY
Posts: 1,352

IGL - '04 Saturn Ion
Team Saturn
90 day: 56.19 mpg (US)
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Did the grooves help any at all?
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