Denso IRE01-31 Spark Plug

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Rating

4.3 / 5 Overall
Denso	IRE01-31
Brand	Code
4.5 / 5 Materials
Platinum	Iridium
Ground electrode	Center electrode
4.0 / 5 Design
Flat	Fine Wire
Ground type	Center type

Specifications

0.7mm (.028")	31
Gap	Heat range
⌀14mm	1.25mm
Thread diameter	Thread pitch
21.5mm (.846")	21mm (13/16")
Reach	Hex size
Gasket	Removable Nut
Seat	Terminal
1	Non-Projected
Ground count	Projection

Cross-reference and alternatives

Cross-reference (2)

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

R7420-10

Iridium-Platinum

4.5/ 5

.028"21mm, ⌀14x1.25HR 10

R6725-10

Platinum

4.0/ 5

.028"21.5mm, ⌀14x1.25HR 10

One step colder (2)

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

IRE01-34

Iridium-Platinum

-

4.3/ 5

.028"21.5mm, ⌀14x1.25HR 34

R6725-11

Platinum

4.0/ 5

.028"21.5mm, ⌀14x1.25HR 11