by Dr. Radut

Racing Spark Plugs

Top Fuel /TAD
SPARK PLUG LIST HEMI – 14mm x 3/4″(19mm) Reach 13/16″(20.6mm) or 5/8 Hex – Gasket seat		 Autolite Racing Plugs.pdf

Autolite

Champion -> N series
NGK
 NGK – Stock# SplitFire MotorCraft Ac-
Delco
Accel
Projected Standard Retracted

Hot

*

 AR53, 893, XS63, 53, 63, 4253, 4263 N9YC, N89Y, stk300 BP5E, BP5ES, BP5EVX , BP6E, BP6ES, BP6EY, BP6ESZ, BP7ES, BPR5EP-11 7811, 7333, 1034, 7727 AG224, AG32, AG25, AGS12C, AG22, AG22C, AGS22C, AG32C 42CXLS, R41XLS, C42CXLS, 41XLS, 42XLS, 43XLS 113, 114, 115
AR52 N66Y, N8GY, N65Y, N63YD, N7GY, N7YC, 336, N8Y, 813, N7Y,
stk 760		 N63DR R5672A-8 / R-7232-10 44XLS

112, 113
4056, 404 N5, N6, N8B, N5C, N288 B6ES, BP6ES, BP6EY, BP7ES 7310 AG3 43N, 42XLS 113, 114
AR3910,
2416		 N63Y BP9ES 7526 SF405B AG603 111
4055, 403
XST4055		 N63YD N4

B7ES, R5671-7, 2311, B7ECS, B7ES-11, 1111, 2528, 2877

 1111 AG1X 42XL, 41XLS 112,
143
AR51, 403,
4053, XS4064		 N61YD N3 N61DR, N62R

R6061-8
(cut back Ground)

B8ES, R5671-8, 2411, B8ECS, B8ES-11, 1015
3683

 2411 AG1 142
AR2594
AR2592
2593
4052		 N2, N2C, N3C, N1C, N60, N84, C55,

R6061-9
(cut back Ground)

B9ES, R5671-9

 2611 SF406C
SF405D		 AG901C, AG701, AG071, AG701C, AG901, AG901CU, AG091, AG701CU,
68, 69		 141, 112
AR2593
4062		 N1

R5671-10
B10ES
R6061-10
(cut back Ground)

7928
R5671-10
AR3911 N62Y, C61YC, 794 R5672A-8, 7173
N60Y N60 N60DR
N60R
AR3910 N61Y, C57YC, N59YC N57DR
N57R		 B10EG, R5672-9, 4709, 7405, 5554,
FR9BI-11		 7405
AR3932,
4051		 N57, C57,C57CX, QN1, 686, C55C, C57C, N2C, N59G,, N82G, N82, 782, 295, 769, stk 295

R5671-10
B10ES
R6061-10
(cut back Ground)

B10EG, 6239, 5820

 5820 SF405A AGP501, AGP501C, AGP501X, 41R02,
S40XL
2413
(old-2414)		 N80, N55G, N80G, C53 N54R, C53VC (surface gap) B11EGP, B11EGV, B105EGV, B10EGP
R4652-10.5, R4425D-11
2055, 5831, 2171, 3630		 5224 AG203
Cold N52R

B11ES

R6061-11
(cut back Ground)

TF
AR5384
Standard Tip
Long Pilot
.843″ reach		 N1043Y (#1029s = 24 pkg)

TF

AR5383
.750 reach
(TF50)
(AR50)

Power tip


Champion -> R=retracted, P=projected, DR=drag race, G=gold
Autolite -> R=racing
NGK -> G=gold
Almost – Stock Hemi Heat range *
Racing Spark Plug Cross Reference Chart
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,438XLS 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,42S 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 M90,436T V57C R5673-9 3442
AR133 438T V59C R5673-8 3249
AR134 MR41T V63C R5673-8 3249
AR135 440T V63C R5673-7 4367
– RV8C R5673-6 4256
42TS R5674-6 4449
438TS R5674-8 5657
436TS R5674-9 6468
– 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

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.