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Terry Burtz, Calif · 01-11-2021, 09:10 PM

Besides the 3, reproduction bases have a fine internal knurl with 2 unknurled bands.

Bases with the correct coarse knurl and no bands are available from the parts dealers.

01-11-2021, 09:10 PM	#9
Terry Burtz, Calif Senior Member Join Date: May 2010 Location: Campbell,CA, USA Posts: 319	Re: 3 x spark plugs Besides the 3, reproduction bases have a fine internal knurl with 2 unknurled bands. Bases with the correct coarse knurl and no bands are available from the parts dealers.