Description
The O.S. R5 plug is a “standard” plug at almost medium heat on the chart from O.S. We have found these run very well and reliably in the 67 & 81 CMB Engines.
The O.S. R5 plug is a “standard” plug at almost medium heat on the chart from O.S. We have found these run very well and reliably in the 67 & 81 CMB Engines.
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