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RE: TR4A plugs

To: "'fot@autox.team.net'" <fot@autox.team.net>
Subject: RE: TR4A plugs
From: Bill Babcock <BillB@bnj.com>
Date: Mon, 17 Jul 2000 09:39:06 -0700
NGK heat range goes (roughly)like this: hotter <  B7HS  B7H B7HC B8HS B8H
B8HC >>colder  H means 1/2" thread length, E as in B8ES means 3/4"  B means
the 13/16" size plugs (I forget the thread diameter, is it 14MM?)and D is
the little 5/8" size plugs (10mm I guess). So you don't have to go in full
numeric steps. 

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