NGK B4-LM Spark Plug

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Rating

2.9 / 5 Overall
NGK	B4-LM
Brand	Code
3.0 / 5 Materials
Copper	Copper
Ground electrode	Center electrode
2.8 / 5 Design
Standard	Standard
Ground type	Center type

Specifications

0.7mm (.028")	4
Gap	Heat range
⌀14mm	1.25mm
Thread diameter	Thread pitch
9.5mm (3/8")	21mm (13/16")
Reach	Hex size
Gasket	Removable Nut
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

W14LM-U

Copper

3.3/ 5

.028"11mm, ⌀14x1.25HR 14

456

Copper

-

2.9/ 5

.031"9.5mm, ⌀14x1.25HR 7

845-1

Copper

-

2.9/ 5

.026"9.5mm, ⌀14x1.25HR 17

J17LM

Copper

-

2.9/ 5

.026"9.5mm, ⌀14x1.25HR 17

258

Copper

-

2.9/ 5

.024"9.5mm, ⌀14x1.25HR 9

258DP

Copper

-

2.9/ 5

.024"9.5mm, ⌀14x1.25HR 9

Deep reference (23)

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

XST458

Iridium-Platinum

4.2/ 5

.031"9.5mm, ⌀14x1.25HR 9

XST458

Iridium-Platinum

4.2/ 5

.031"9.5mm, ⌀14x1.25HR 9

W14-U

Copper

3.3/ 5

.028"9.5mm, ⌀14x1.25HR 14

W14LM-U

Copper

3.3/ 5

.028"11mm, ⌀14x1.25HR 14

W14LM-U

Copper

3.3/ 5

.028"11mm, ⌀14x1.25HR 14

W14M-U

Copper

3.3/ 5

.028"9.5mm, ⌀14x1.25HR 14

5846

Copper

3.2/ 5

.024"9.5mm, ⌀14x1.25HR 14

B4LMY

Copper

3.1/ 5

.028"9.5mm, ⌀14x1.25HR 4

B4LMY

Copper

3.1/ 5

.028"9.5mm, ⌀14x1.25HR 4

BM4Y

Copper

3.1/ 5

.028"9.5mm, ⌀14x1.25HR 4

456

Copper

-

2.9/ 5

.031"9.5mm, ⌀14x1.25HR 7

J17LM

Copper

-

2.9/ 5

.026"9.5mm, ⌀14x1.25HR 17

RJ17LM

Copper

-

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 17

J17LM

Copper

-

2.9/ 5

.026"9.5mm, ⌀14x1.25HR 17

RJ17LM

Copper

-

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 17

BR4-LM

Copper

-

2.9/ 5

.028"9.5mm, ⌀14x1.25HR 4

456

Copper

-

2.9/ 5

.031"9.5mm, ⌀14x1.25HR 7

CJ14

Copper

-

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 14

RJ12C

Copper

-

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 12

BM4A

Copper

-

2.9/ 5

.028"9.5mm, ⌀14x1.25HR 4

BMR2A

Copper

-

2.9/ 5

.028"9.5mm, ⌀14x1.25HR 2

BMR2A-10

Copper

-

2.9/ 5

.039"9.5mm, ⌀14x1.25HR 2

BMR4A

Copper

-

2.9/ 5

.028"9.5mm, ⌀14x1.25HR 4

Same specs (2)

Products that have identical characteristics that impact interchangability

B4LMY

Copper

3.1/ 5

.028"9.5mm, ⌀14x1.25HR 4

B-4

Copper

-

2.9/ 5

.028"9.5mm, ⌀14x1.25HR 4

Two steps colder (1)

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

B6S

Copper

-

2.9/ 5

.028"9.5mm, ⌀14x1.25HR 6