Denso IK31 5321 Spark Plug

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Rating

4.3 / 5 Overall
Denso	IK31
Brand	Code
4.0 / 5 Materials
Copper	Iridium
Ground electrode	Center electrode
4.8 / 5 Design
U-Groove	Fine Wire
Ground type	Center type

Specifications

0.8mm (.031")	31
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

QC57C

Copper

3.3/ 5

.026"19mm, ⌀14x1.25HR 57

QC57

Copper

3.2/ 5

.026"19mm, ⌀14x1.25HR 57

QC59

Copper

3.2/ 5

.026"19mm, ⌀14x1.25HR 59

R5671A-10

Copper

3.1/ 5

.020"19mm, ⌀14x1.25HR 10

R5672A-10

Copper

3.1/ 5

.020"19mm, ⌀14x1.25HR 10

C57YC

Copper

2.9/ 5

.026"19mm, ⌀14x1.25HR 57

Deep reference (14)

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

C57

Copper

3.5/ 5

.026"19mm, ⌀14x1.25HR 57

C57Y

Copper

3.5/ 5

.030"19mm, ⌀14x1.25HR 57

C55CX

Copper

3.3/ 5

.035"19mm, ⌀14x1.25HR 55

C57CX

Copper

3.3/ 5

.035"19mm, ⌀14x1.25HR 57

AR3931

Copper

3.3/ 5

.024"19mm, ⌀14x1.25HR 1

AR3932

Copper

3.3/ 5

.024"19mm, ⌀14x1.25HR 2

AR2592

Copper

3.3/ 5

.024"19mm, ⌀14x1.25HR 1

C57HCX

Copper

3.3/ 5

.035"19mm, ⌀14x1.25HR 57

AR50

Copper

3.3/ 5

.024"19mm, ⌀14x1.25HR 2

AR3910

Copper

3.3/ 5

.024"19mm, ⌀14x1.25HR 3

C55

Copper

3.2/ 5

.026"19mm, ⌀14x1.25HR 55

R5672A-10

Copper

3.1/ 5

.020"19mm, ⌀14x1.25HR 10

C57YC

Copper

2.9/ 5

.026"19mm, ⌀14x1.25HR 57

AR3932X

Copper

0.0/ 5

.031"19mm, ⌀14x1.25HR 2

Same specs (1)

Products that have identical characteristics that impact interchangability

IQ31

Copper-Iridium

-

4.3/ 5

.031"19mm, ⌀14x1.25HR 31

One step colder (2)

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

IK34

Copper-Iridium

-

4.3/ 5

.031"19mm, ⌀14x1.25HR 34

IQ34

Copper-Iridium

-

4.3/ 5

.031"19mm, ⌀14x1.25HR 34