Denso W14-U Spark Plug

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Rating

3.3 / 5 Overall
Denso	W14-U
Brand	Code
3.0 / 5 Materials
Copper	Copper
Ground electrode	Center electrode
4.0 / 5 Design
U-Groove	Standard
Ground type	Center type

Specifications

0.7mm (.028")	14
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 (5)

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

XST458

Iridium-Platinum

4.2/ 5

.031"9.5mm, ⌀14x1.25HR 9

WR9EC0

Copper

2.9/ 5

.031"9.5mm, ⌀14x1.25HR 9

295

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 7

456

Copper

2.9/ 5

.031"9.5mm, ⌀14x1.25HR 7

B-4

Copper

2.9/ 5

.028"9.5mm, ⌀14x1.25HR 4

Deep reference (27)

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

W14LM-U

Copper

-

3.3/ 5

.028"11mm, ⌀14x1.25HR 14

W14LM-U

Copper

-

3.3/ 5

.028"11mm, ⌀14x1.25HR 14

RJ19HX

Copper

3.2/ 5

.030"9.5mm, ⌀14x1.25HR 19

UJ11G

Copper

3.2/ 5

.026"9.5mm, ⌀14x1.25HR 11

B4LMY

Copper

3.1/ 5

.028"9.5mm, ⌀14x1.25HR 4

B4LMY

Copper

3.1/ 5

.028"9.5mm, ⌀14x1.25HR 4

W14US

Copper

3.1/ 5

.028"9.5mm, ⌀14x1.25HR 14

J17LM

Copper

2.9/ 5

.026"9.5mm, ⌀14x1.25HR 17

J19LM

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 19

QJ19LM

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 19

RJ17LM

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 17

B2-LM

Copper

2.9/ 5

.028"9.5mm, ⌀14x1.25HR 2

306

Copper

2.9/ 5

.035"9.5mm, ⌀14x1.25HR 8

BR6S

Copper

2.9/ 5

.028"9.5mm, ⌀14x1.25HR 6

B6S

Copper

2.9/ 5

.028"9.5mm, ⌀14x1.25HR 6

B-4

Copper

2.9/ 5

.028"9.5mm, ⌀14x1.25HR 4

J17LM

Copper

2.9/ 5

.026"9.5mm, ⌀14x1.25HR 17

RJ17LM

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 17

B4-LM

Copper

2.9/ 5

.028"9.5mm, ⌀14x1.25HR 4

BR4-LM

Copper

2.9/ 5

.028"9.5mm, ⌀14x1.25HR 4

295

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 7

306

Copper

2.9/ 5

.035"9.5mm, ⌀14x1.25HR 8

J11C

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 11

255

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 6

255BP

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 6

255DP

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 6

295DP

Copper

2.9/ 5

.030"9.5mm, ⌀14x1.25HR 7

Same specs (2)

Products that have identical characteristics that impact interchangability

W14M-U

Copper

-

3.3/ 5

.028"9.5mm, ⌀14x1.25HR 14

W14US

Copper

3.1/ 5

.028"9.5mm, ⌀14x1.25HR 14

One step colder (1)

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

W16S-U

Copper

-

3.3/ 5

.028"9.5mm, ⌀14x1.25HR 16

Two steps colder (2)

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

W20S-U

Copper

-

3.3/ 5

.028"9.5mm, ⌀14x1.25HR 20

W20M-U

Copper

-

3.3/ 5

.028"9.5mm, ⌀14x1.25HR 20