Champion RC12PLC4 Spark Plug

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Rating

3.3 / 5 Overall
Champion	RC12PLC4
Brand	Code
3.5 / 5 Materials
Copper	Platinum
Ground electrode	Center electrode
2.8 / 5 Design
Standard	Standard
Ground type	Center type

Specifications

1mm (.039")	12
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

Same specs (11)

Products that have identical characteristics that impact interchangability

RC12WLPB4

Iridium-Platinum

4.2/ 5

.039"19mm, ⌀14x1.25HR 12

RC12WMPB4

Iridium-Platinum

4.2/ 5

.039"19mm, ⌀14x1.25HR 12

7318-2

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3.8/ 5

.039"19mm, ⌀14x1.25HR 12

RC12PMPB4

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3.8/ 5

.039"19mm, ⌀14x1.25HR 12

RC12PMC4

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-

3.3/ 5

.039"19mm, ⌀14x1.25HR 12

318CC

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2.9/ 5

.039"19mm, ⌀14x1.25HR 12

318C2

Copper

2.9/ 5

.039"19mm, ⌀14x1.25HR 12

RC12MC-4

Copper

2.9/ 5

.039"19mm, ⌀14x1.25HR 12

RC12MCC4

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2.9/ 5

.039"19mm, ⌀14x1.25HR 12

439C2

Copper

2.9/ 5

.039"19mm, ⌀14x1.25HR 12

QC12GMC MARINE

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2.9/ 5

.039"19mm, ⌀14x1.25HR 12

Bigger gap (4)

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

RC12WEPB

Iridium-Platinum

4.2/ 5

.045"19mm, ⌀14x1.25HR 12

7034-2

Platinum

3.8/ 5

.049"19mm, ⌀14x1.25HR 12

RC12PEPB5

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3.8/ 5

.049"19mm, ⌀14x1.25HR 12

RC12PEC5

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-

3.3/ 5

.049"19mm, ⌀14x1.25HR 12

One step colder (9)

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

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

RC12LC4

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2.9/ 5

.039"19mm, ⌀14x1.25HR 9

Two steps colder (3)

Two steps colder spark plugs with same characteristics for heavily modified engines (150-200 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