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Domed Opel piston

Side view of 11.5:1 Venolia piston compared to stock 1971-1975 Opel (US-spec) piston. US-spec Opel pistons are rated at 7.6:1 compression, but in reality I've found them to be closer to 7.1-7.2:1. Damn emissions era!

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Uploaded on June 26, 2009
Taken on June 15, 2009