NGK WR4-1 4652 Spark Plug

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Rating

3.1 / 5 Overall
NGK	WR4-1
Brand	Code
3.0 / 5 Materials
Copper	Copper
Ground electrode	Center electrode
3.3 / 5 Design
Standard	V-Cut
Ground type	Center type

Specifications

1mm (.039")	4
Gap	Heat range
⌀18mm	1.5mm
Thread diameter	Thread pitch
13.7mm (.539")	21mm (13/16")
Reach	Hex size
Tapered	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

MA9P-U

Copper

3.3/ 5

.035"11.6mm, ⌀18x1.5HR 9

5125

Copper

2.9/ 5

.045"11.6mm, ⌀18x1.5HR 2

5125BP

Copper

2.9/ 5

.045"11.6mm, ⌀18x1.5HR 2

5125DP2

Copper

2.9/ 5

.045"11.6mm, ⌀18x1.5HR 2

130C2

Copper

2.9/ 5

.043"12.7mm, ⌀18x1.5HR 14

RF14LC

Copper

2.9/ 5

.043"12.7mm, ⌀18x1.5HR 14

Deep reference (6)

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

MA20PR-U

Copper

3.3/ 5

.035"11.6mm, ⌀18x1.5HR 20

MA16PR-U

Copper

3.3/ 5

.035"11.6mm, ⌀18x1.5HR 16

RF18YC

Copper

2.9/ 5

.035"11mm, ⌀18x1.5HR 18

46

Copper

2.9/ 5

.043"11mm, ⌀18x1.5HR 3

RF14LC

Copper

2.9/ 5

.043"12.7mm, ⌀18x1.5HR 14

5125

Copper

2.9/ 5

.045"11.6mm, ⌀18x1.5HR 2