All my washers were 13.4 inside diameter and 18.45 outside diameter. You should list them as 13.4 x 18.5, which would be closer. Quality discs are sized within 0.05mm. in the stated sizes and fitting as they should, they fit sloppily and encourage leakage.
๐ช FEL-PRO VS 50569 R Valve Cover Gasket Set: Superior Performance and Durability
9 Review
๐ง FEL-PRO OS 34308 R Oil Pan Gasket Set: High-quality, Leak-proof Solution for Optimal Engine Performance
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5W-40FS A3/B4
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๐ง FEL-PRO VS 50561 R Valve Cover Gasket Set: Superior Quality and Durability for Optimal Engine Performance
9 Review