NGK IZFR6J Spark Plug

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Rating

4.2 / 5 Overall
NGK	IZFR6J
Brand	Code
4.5 / 5 Materials
Platinum	Iridium
Ground electrode	Center electrode
3.5 / 5 Design
Standard	Fine Wire
Ground type	Center type

Specifications

0.8mm (.031")	6
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 (1)

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

XP5405

Iridium-Platinum

-

4.2/ 5

.050"19mm, ⌀14x1.25HR 3

Deep reference (3)

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

IZFR7M

Iridium-Platinum

-

4.2/ 5

.031"19mm, ⌀14x1.25HR 7

RC12PEPB5

Platinum

3.8/ 5

.049"19mm, ⌀14x1.25HR 12

ZFR5FIX-11

Copper-Iridium

3.8/ 5

.043"19mm, ⌀14x1.25HR 5

Same specs (7)

Products that have identical characteristics that impact interchangability

IZFR6Q

Iridium-Platinum

-

4.2/ 5

.031"19mm, ⌀14x1.25HR 6

PQ20R-P8

Platinum

3.8/ 5

.031"19mm, ⌀14x1.25HR 20

PKJ20CR-8

Platinum

3.8/ 5

.031"19mm, ⌀14x1.25HR 20

PQ20R8

Platinum

3.8/ 5

.031"19mm, ⌀14x1.25HR 20

PZFR6B

Platinum

3.8/ 5

.031"19mm, ⌀14x1.25HR 6

PZFR6H

Platinum

3.8/ 5

.031"19mm, ⌀14x1.25HR 6

PZFR6F

Platinum

3.8/ 5

.031"19mm, ⌀14x1.25HR 6

Bigger gap (21)

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

IZFR6K-11

Iridium-Platinum

-

4.2/ 5

.043"19mm, ⌀14x1.25HR 6

IZFR6K-11S

Iridium-Platinum

-

4.2/ 5

.043"19mm, ⌀14x1.25HR 6

IZFR6H-11

Iridium-Platinum

-

4.2/ 5

.043"19mm, ⌀14x1.25HR 6

IZFR6F-11

Iridium-Platinum

-

4.2/ 5

.043"19mm, ⌀14x1.25HR 6

PQ20R

Platinum

3.8/ 5

.043"19mm, ⌀14x1.25HR 20

ZFR6FIX-11

Copper-Iridium

3.8/ 5

.043"19mm, ⌀14x1.25HR 6

PZFR6E-11

Platinum

3.8/ 5

.043"19mm, ⌀14x1.25HR 6

PZFR6F-11

Platinum

3.8/ 5

.043"19mm, ⌀14x1.25HR 6

PQ20R-P11

Platinum

3.8/ 5

.043"19mm, ⌀14x1.25HR 20

PKJ20CR-L11

Platinum

3.8/ 5

.043"19mm, ⌀14x1.25HR 20

ZFR6AGP

Copper-Platinum

3.5/ 5

.039"19mm, ⌀14x1.25HR 6

ZFR6FGP

Copper-Platinum

3.5/ 5

.039"19mm, ⌀14x1.25HR 6

ZFR6A-11

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 6

ZFR6F-11

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 6

ZFR6J-11

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 6

ZFR6F-11 BLYB

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 6

ZFR6U-9

Copper

3.1/ 5

.035"19mm, ⌀14x1.25HR 6

ZFR6F-11G

Copper

3.1/ 5

.043"19mm, ⌀14x1.25HR 6

KJ20CR11

Copper

2.9/ 5

.043"19mm, ⌀14x1.25HR 20

QJ20CR11

Copper

2.9/ 5

.043"19mm, ⌀14x1.25HR 20

KJ20CR-L11

Copper

2.8/ 5

.043"19mm, ⌀14x1.25HR 20

One step colder (4)

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

IZFR7M

Iridium-Platinum

-

4.2/ 5

.031"19mm, ⌀14x1.25HR 7

PZFR7G-G

Platinum

3.8/ 5

.031"19mm, ⌀14x1.25HR 7

ZFR7F

Copper

3.1/ 5

.031"19mm, ⌀14x1.25HR 7

KJ22CRL8

Copper

2.8/ 5

.031"19mm, ⌀14x1.25HR 22