NGK R0406A-9 Spark Plug

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Rating

4.5 / 5 Overall
NGK	R0406A-9
Brand	Code
4.5 / 5 Materials
Platinum	Iridium
Ground electrode	Center electrode
4.5 / 5 Design
Slant	Fine Wire
Ground type	Center type

Specifications

0.6mm (.024")	9
Gap	Heat range
⌀10mm	1mm
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

IU01-27

Iridium-Platinum

-

4.5/ 5

.024"19mm, ⌀10x1HR 27

Deep reference (1)

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

R0373A-9

Iridium-Platinum

-

4.5/ 5

.024"19mm, ⌀10x1HR 9

Same specs (1)

Products that have identical characteristics that impact interchangability

R0373A-9

Iridium-Platinum

-

4.5/ 5

.024"19mm, ⌀10x1HR 9

One step colder (2)

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

IU01-31

Iridium-Platinum

-

4.5/ 5

.024"19mm, ⌀10x1HR 31

R0373A-10

Iridium-Platinum

-

4.5/ 5

.024"19mm, ⌀10x1HR 10

Two steps colder (2)

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

IU01-34

Iridium-Platinum

-

4.5/ 5

.024"19mm, ⌀10x1HR 34

R0373A-11

Iridium-Platinum

-

4.5/ 5

.024"19mm, ⌀10x1HR 11