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#1
01-21-2007, 07:26 PM
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What's the difference between 41-902 plugs & ...
41-940 sparks plugs. I have set of 41-940 for a 93 Bonneville with 3.8 that I'd like to use in my son's 91 PA, but the 41-902's are recommended for my 91 PA. However, there are a bunch of plugs that can be used for either car. Any help would be appreciated. Thanks.
BTW All plugs number mentioned are AC Delco.
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1949 Chevrolet 1433 (Canadian 1 ton cab and chassis single rear wheel pick-up truck) 1968 Pontiac Parisienne (rust free survivor) 1973 Buick Centurion (four door hardtop; engine will be donated to our 1949 1 ton truck) 1989 Chevrolet K3500 RC/LB (454 & single rear wheels) 1991 Chevrolet Caprice Classic (police cruiser clone) 1992 Chevrolet K2500 EC/SB (almost rust free daily driver) 1998 GMC C1500 EC/SB Last edited by 1968 Pontiac; 01-27-2007 at 07:01 AM. 
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#2
01-22-2007, 11:40 AM
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Re: What's the difference between 41-902 plugs & ...
The first link below, will show you how the numbering system works. The second link, you can enter the part number of the plug and it will tell you what car they may be used in. Be careful, heat ranges vary significantly between plugs, with wide margins in the last set of numbers.
Spark Plug Identification Table | Parts Information | ACDelco Parts Information | ACDelco
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