DragStuff.com
FORUM | DIRECTORY | CLASSIFIEDS | TECH
DragStuff Home > Article Index

Racing Spark Plug Cross Reference Chart

Autolite / Champion to NGK

Autolite Racing
AC Delco
Champion
NGK
NGK Stock Number
AR12 40TS RV9YC R5674-7 5034
AR13   RV9YC R5674-6 4449 
AR23   RV9YC BPR6FS 2623 
AR24   RV12YC BPR6FS 2623 
AR25   RV15YC4 UR4 6630 
AR32   RF9YC AP8FS 2227 
AR33   RF9YC AP7FS 2127 
AR50   N59YD R5672A-10 3395 
AR51 436XLS N61YD,N6YC R5672A-9 7405 
AR52 440XLS N63YD,N7YC R5672A-8 7173 
AR53   N9YC BP6ES 7333 
  C44S   R5670-5 2298
  44S   R5670-5 2298
  45S   R5670-5 2298
  46S   R5670-5 2298
AR72   J12YC R5670-7 2891 
AR73 R43S,43S J12YC R5670-6 2746 
AR74 M43S J12YC R5670-6 2746 
AR92   S57YC R5724-10 7993 
AR93   S59YC R5724-9 6434 
AR94   S61YC R5724-8 4175 
AR103   RS9YC BPR6EFS/TR6 3623 
–   RF10C AR6FS 3323 
AR131   V55C R5673-10 4050 
AR132 M90 V57C R5673-9 3442 
AR133   V59C R5673-8 3249 
AR134 MR41T V63C R5673-8 3249 
AR135   V63C R5673-7 4367 
–   RV8C R5673-6 4256 
–   N3C R5671A-7 4091 
AR472   S57C B9EFS 1085 
AR473   S59C B9EFS 1085 
AR474   S61C B8EFS 1049 
AR764   RS12YC TR5 2238 
AR2592   C59 R5671A-10 5820 
AR2593   C61 R5671A-9 5238 
AR2594   N2C B9ES 2611 
AR3910   C59YC R5672A-9 7405 
AR3911 440XLS C61YC R5672A-8 7173 
AR3923   RC9YC BKR6E 6962 
AR3924   RC12YC FR5 7373 
AR3931   C55C R5671A-11 6596 
AR3932 S40XL C57CX R5671A-10 5820 
AR3933 S41XL, 436XLS C59CX R5671A-9 5238 
AR3934 41XL C61CX R5671A-8 4554 
AR3935   C63C R5671A-7 4091 
–   L87YC BP6HS 7331 
         

 

AC Delco to NGK

AC
DELCO
NGK
PN
NGK Stock
Number
42S R5670-6 2746
42TS R5674-6 4449
436T R5673-9 3442
436TS R5674-9 6468
438T R5673-8 3249
438TS R5674-8 5657
438XLS R5672A-8 7173
  R5670-6 2746
43TS R5674-6 4449
440T R5673-7 2817
     
R42S R5670-6 2746

Heat Range Reference

  • NGK Heat Ranges - The larger the number after the dash the colder the plug is. Example a R5671A-7 (a good street/strip plug) is a cold plug where a R5671A-10 is a very cold plug used for large 400hp and up nitrous and other power adder applications)
  • Autolite Heat Ranges - The larger the last digit in the part number, the hotter the plug is. Example a AR3935 (good street/strip plug) is hotter than a AR3932 plug which is very cold used for lots of nitrous.
  • Champion Heat Ranges - Typically Champion numbers in the same series the larger the number the hotter the plug.

Additional Spark Plug Related Resources

 
DragStuff Home | Racing Articles | Drag Racing Message Board | Drag Racing Classifieds

DragStuff.com a service of

© Copyright 2003 - 2008 - Beyond Engineering
A Division of CJ Group, Inc.
1007 US Highway 54 West, La Harpe KS 66749

(620) 496-2682

Web hosting by Pair Networks

36893 visits (2 today, 259 this week, 1097 this month, 7972 this year)