Champion RC12LC4 Spark Plug

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Rating

2.9 / 5 Overall
Champion	RC12LC4
Brand	Code
3.0 / 5 Materials
Copper	Copper
Ground electrode	Center electrode
2.8 / 5 Design
Standard	Standard
Ground type	Center type

Specifications

1mm (.039")	9
Gap	Heat range
⌀14mm	1.25mm
Thread diameter	Thread pitch
19mm (3/4")	16mm (5/8")
Reach	Hex size
Gasket	Solid
Seat	Terminal
1	Non-Projected
Ground count	Projection

Cross-reference and alternatives

Cross-reference (6)

Alternative spark plugs found in cross-reference docs provided by manufacturers

VKA16

Iridium-Platinum

4.3/ 5

.043"22mm, ⌀14x1.25HR 16

ZFR6FGP

Copper-Platinum

3.5/ 5

.039"19mm, ⌀14x1.25HR 6

ZFR5F-11

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 5

ZFR6F-11

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 6

5224

Copper

-

2.9/ 5

.045"19mm, ⌀14x1.25HR 3

KJ16CR-L11

Copper

2.8/ 5

.043"19mm, ⌀14x1.25HR 16

Deep reference (73)

A second level of cross-reference: if A=B and B=C, then A=C

VK20

Iridium-Platinum

4.2/ 5

.043"19mm, ⌀14x1.25HR 20

FR7LPP30X

Copper-Platinum

3.5/ 5

.043"19mm, ⌀14x1.25HR 7

FR8HPP30X

Copper-Platinum

3.5/ 5

.043"19mm, ⌀14x1.25HR 8

FR8LPP302X

Copper-Platinum

3.5/ 5

.043"19mm, ⌀14x1.25HR 8

RC12PMC4

Copper-Platinum

3.3/ 5

.039"19mm, ⌀14x1.25HR 12

KJ16CR-U11

Copper

3.3/ 5

.043"19mm, ⌀14x1.25HR 16

RC10DMC

Copper

3.3/ 5

.035"19mm, ⌀14x1.25HR 10

K16GPR-U11

Copper

3.3/ 5

.043"22mm, ⌀14x1.25HR 16

K16TR11

Copper

3.3/ 5

.043"19mm, ⌀14x1.25HR 16

Q16PR-U

Copper

3.3/ 5

.031"19mm, ⌀14x1.25HR 16

QJ16AR-U

Copper

3.3/ 5

.031"19mm, ⌀14x1.25HR 16

BKR5EKB-11

Copper

3.3/ 5

.043"19mm, ⌀14x1.25HR 5

AP5224

Copper-Platinum

3.2/ 5

.045"19mm, ⌀14x1.25HR 3

AP5405

Copper-Platinum

3.2/ 5

.050"19mm, ⌀14x1.25HR 3

AP5405DP2

Copper-Platinum

3.2/ 5

.050"19mm, ⌀14x1.25HR 3

FLR8LDCU+

Copper

3.2/ 5

.039"19mm, ⌀14x1.25HR 8

FLR8LDCU

Copper

3.2/ 5

.039"19mm, ⌀14x1.25HR 8

ZFR6A-11

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 6

ZFR6F-11

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 6

ZFR5E-11

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 5

ZFR5F OSN

Copper

3.1/ 5

.031"19mm, ⌀14x1.25HR 5

ZFR5J-11

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 5

ZFR6J-11

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 6

ZFR6F-11G

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 6

BKR5EKU

Copper

3.1/ 5

.028"19mm, ⌀14x1.25HR 5

ZFR4F-11

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 4

ZFR5A-11

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 5

ZFR5F

Copper

3.1/ 5

.031"19mm, ⌀14x1.25HR 5

ZFR5F-11

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 5

ZFR6K-11

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 6

ZFR7F

Copper

3.1/ 5

.031"19mm, ⌀14x1.25HR 7

BKR5E

Copper

3.1/ 5

.035"19mm, ⌀14x1.25HR 5

ZFR5F-11

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 5

ZFR5J-11

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 5

RC12LYC

Copper

-

2.9/ 5

.035"19mm, ⌀14x1.25HR 12

FR8LCX

Copper

-

2.9/ 5

.043"19mm, ⌀14x1.25HR 8

318C2

Copper

-

2.9/ 5

.039"19mm, ⌀14x1.25HR 12

436S

Copper

-

2.9/ 5

.039"19mm, ⌀14x1.25HR 9

RC9MC4

Copper

-

2.9/ 5

.039"19mm, ⌀14x1.25HR 9

RFN14LY

Copper

-

2.9/ 5

.035"19mm, ⌀14x1.25HR 14

FR8LCX+

Copper

-

2.9/ 5

.043"19mm, ⌀14x1.25HR 8

QC9MC4

Copper

-

2.9/ 5

.039"19mm, ⌀14x1.25HR 9

RC12MCC4

Copper

-

2.9/ 5

.039"19mm, ⌀14x1.25HR 12

5224

Copper

-

2.9/ 5

.045"19mm, ⌀14x1.25HR 3

FR7LCX+

Copper

-

2.9/ 5

.043"19mm, ⌀14x1.25HR 7

QC9MC4

Copper

-

2.9/ 5

.039"19mm, ⌀14x1.25HR 9

RC10ECC

Copper

-

2.9/ 5

.035"19mm, ⌀14x1.25HR 10

5224

Copper

-

2.9/ 5

.045"19mm, ⌀14x1.25HR 3

FR9LCX

Copper

-

2.9/ 5

.043"19mm, ⌀14x1.25HR 9

FR9LCX+

Copper

-

2.9/ 5

.043"19mm, ⌀14x1.25HR 9

FR8LCX+

Copper

-

2.9/ 5

.043"19mm, ⌀14x1.25HR 8

FR8LCX

Copper

-

2.9/ 5

.043"19mm, ⌀14x1.25HR 8

QC9MC4

Copper

-

2.9/ 5

.039"19mm, ⌀14x1.25HR 9

RC11ZYC4

Copper

-

2.9/ 5

.039"19mm, ⌀14x1.25HR 11

RC12MCC4

Copper

-

2.9/ 5

.039"19mm, ⌀14x1.25HR 12

RC9MC4

Copper

-

2.9/ 5

.039"19mm, ⌀14x1.25HR 9

RC9MCC

Copper

-

2.9/ 5

.035"19mm, ⌀14x1.25HR 9

KJ14CR11

Copper

-

2.9/ 5

.043"19mm, ⌀14x1.25HR 14

KJ20CR11

Copper

-

2.9/ 5

.043"19mm, ⌀14x1.25HR 20

KJ20DR-M11

Copper

-

2.9/ 5

.043"19mm, ⌀14x1.25HR 20

QJ20CR11

Copper

-

2.9/ 5

.043"19mm, ⌀14x1.25HR 20

ZFR5D-11

Copper

-

2.9/ 5

.043"19mm, ⌀14x1.25HR 5

RC10MCC

Copper

-

2.9/ 5

.033"19mm, ⌀14x1.25HR 10

RC12ECC

Copper

-

2.9/ 5

.035"19mm, ⌀14x1.25HR 12

RC12LYC

Copper

-

2.9/ 5

.035"19mm, ⌀14x1.25HR 12

RC12MCC4

Copper

-

2.9/ 5

.039"19mm, ⌀14x1.25HR 12

5224

Copper

-

2.9/ 5

.045"19mm, ⌀14x1.25HR 3

KJ16CR-L11

Copper

2.8/ 5

.043"19mm, ⌀14x1.25HR 16

KJ20CR-L11

Copper

2.8/ 5

.043"19mm, ⌀14x1.25HR 20

KJ14CR-L11

Copper

2.8/ 5

.043"19mm, ⌀14x1.25HR 14

KJ16CR-L11

Copper

2.8/ 5

.043"19mm, ⌀14x1.25HR 16

KJ20CR-L11

Copper

2.8/ 5

.043"19mm, ⌀14x1.25HR 20

FR8HCOX

Copper

2.7/ 5

.043"19mm, ⌀14x1.25HR 8

Same specs (8)

Products that have identical characteristics that impact interchangability

RC10WMPB4

Iridium-Platinum

4.2/ 5

.039"19mm, ⌀14x1.25HR 10

RC10PLPB4

Platinum

3.8/ 5

.039"19mm, ⌀14x1.25HR 10

434C2

Copper

-

2.9/ 5

.039"19mm, ⌀14x1.25HR 9

436C2

Copper

-

2.9/ 5

.039"19mm, ⌀14x1.25HR 9

436CC

Copper

-

2.9/ 5

.039"19mm, ⌀14x1.25HR 9

436S

Copper

-

2.9/ 5

.039"19mm, ⌀14x1.25HR 9

QC9MC4

Copper

-

2.9/ 5

.039"19mm, ⌀14x1.25HR 9

RC9MC4

Copper

-

2.9/ 5

.039"19mm, ⌀14x1.25HR 9

Bigger gap (1)

0.1..0.3 mm gap increase for better performance given your ignition system can handle it

RC10WMPB3

Iridium-Platinum

4.2/ 5

.049"19mm, ⌀14x1.25HR 10

One step colder (3)

Colder spark plugs with same characteristics for moderately tuned engines (75–100 hp increase)

RC8WMPB4 PS

Iridium-Platinum

4.2/ 5

.039"19mm, ⌀14x1.25HR 8

9803S

Iridium-Platinum

4.2/ 5

.039"19mm, ⌀14x1.25HR 8

RC8WMPB4

Iridium-Platinum

4.2/ 5

.039"19mm, ⌀14x1.25HR 8