Denso W14US Spark Plug

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Rating
Brand	Code
3.1 / 5 Overall
Denso	W14US
3.0 / 5 Materials
Copper	Copper
Ground electrode	Center electrode
3.3 / 5 Design
U-Groove	Star-Shaped
Ground type	Center type

Specifications
Gap	Heat range
0.7mm (.028")	14
⌀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

How we find alternative spark plugs How we rate spark plugs

Cross-reference (1)

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

B-4

Copper

2.9/ 5

.028"9.5mm, ⌀14x1.25HR 4

Deep reference (9)

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

W14-U

Copper

3.3/ 5

.028"9.5mm, ⌀14x1.25HR 14

UJ11G

Copper

3.2/ 5

.026"9.5mm, ⌀14x1.25HR 11

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

W14-U

Copper

3.3/ 5

.028"9.5mm, ⌀14x1.25HR 14

W14M-U

Copper

3.3/ 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