NGK R5670-6 Spark Plug

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Rating

3.1 / 5 Overall
NGK	R5670-6
Brand	Code
3.0 / 5 Materials
Copper	Copper
Ground electrode	Center electrode
3.3 / 5 Design
Standard	V-Cut
Ground type	Center type

Specifications

0.8mm (.031")	6
Gap	Heat range
⌀14mm	1.25mm
Thread diameter	Thread pitch
9.5mm (3/8")	21mm (13/16")
Reach	Hex size
Gasket	Solid
Seat	Terminal
1	Non-Projected
Ground count	Projection

Cross-reference and alternatives

Cross-reference (3)

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

W20P-U

Copper

3.3/ 5

.031"9.5mm, ⌀14x1.25HR 20

W20PR-U

Copper

3.3/ 5

.028"9.5mm, ⌀14x1.25HR 20

AR73

Copper

3.3/ 5

.024"9.5mm, ⌀14x1.25HR 3

Deep reference (2)

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

XR5

Copper

-

3.1/ 5

.039"9.5mm, ⌀14x1.25HR 5

BR6S

Copper

2.9/ 5

.028"9.5mm, ⌀14x1.25HR 6

One step colder (1)

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

R5670-7

Copper

-

3.1/ 5

.031"9.5mm, ⌀14x1.25HR 7

Two steps colder (1)

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

R5670-8

Copper

-

3.1/ 5

.031"9.5mm, ⌀14x1.25HR 8