NGK R7438-8 Spark Plug

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Rating

4.5 / 5 Overall
NGK	R7438-8
Brand	Code
4.5 / 5 Materials
Platinum	Iridium
Ground electrode	Center electrode
4.5 / 5 Design
Slant	Fine Wire
Ground type	Center type

Specifications

0.7mm (.028")	8
Gap	Heat range
⌀14mm	1.25mm
Thread diameter	Thread pitch
26.5mm (1.04")	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

IKH01-24

Iridium-Platinum

-

4.5/ 5

.028"26.5mm, ⌀14x1.25HR 24

One step colder (2)

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

IKH01-27

Iridium-Platinum

-

4.5/ 5

.028"26.5mm, ⌀14x1.25HR 27

R7438-9

Iridium-Platinum

-

4.5/ 5

.028"26.5mm, ⌀14x1.25HR 9

Two steps colder (1)

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

IKH01-31

Iridium-Platinum

-

4.5/ 5

.028"26.5mm, ⌀14x1.25HR 31