NGK BPR4HS Spark Plug

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Rating

2.9 / 5 Overall
NGK	BPR4HS
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
12.7mm (1/2")	21mm (13/16")
Reach	Hex size
Gasket	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

IWF16

Copper-Iridium

4.3/ 5

.031"12.7mm, ⌀14x1.25HR 16

W14FPR-U

Copper

3.3/ 5

.028"12.7mm, ⌀14x1.25HR 14

W14FPR-UL

Copper

3.3/ 5

.028"12.7mm, ⌀14x1.25HR 14

929C

Copper

-

2.9/ 5

.035"12.7mm, ⌀14x1.25HR 95

RL95YC

Copper

-

2.9/ 5

.035"12.7mm, ⌀14x1.25HR 95

275

Copper

-

2.9/ 5

.024"12.7mm, ⌀14x1.25HR 6

Deep reference (41)

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

IWF22

Copper-Iridium

4.3/ 5

.031"12.7mm, ⌀14x1.25HR 22

IWF24

Copper-Iridium

4.3/ 5

.031"12.7mm, ⌀14x1.25HR 24

IWF16

Copper-Iridium

4.3/ 5

.031"12.7mm, ⌀14x1.25HR 16

BPR6HIX

Copper-Iridium

3.8/ 5

.031"12.7mm, ⌀14x1.25HR 6

W14FPR-U

Copper

3.3/ 5

.028"12.7mm, ⌀14x1.25HR 14

W14FPR-UL

Copper

3.3/ 5

.028"12.7mm, ⌀14x1.25HR 14

W14FP-U

Copper

3.3/ 5

.028"12.7mm, ⌀14x1.25HR 14

W14FP-UL

Copper

3.3/ 5

.028"12.7mm, ⌀14x1.25HR 14

W16FPR-U

Copper

3.3/ 5

.028"12.7mm, ⌀14x1.25HR 16

W16FP-U

Copper

3.3/ 5

.028"12.7mm, ⌀14x1.25HR 16

W20FPR-U

Copper

3.3/ 5

.028"12.7mm, ⌀14x1.25HR 20

W20FP-U

Copper

3.3/ 5

.028"12.7mm, ⌀14x1.25HR 20

W22FP-U

Copper

3.3/ 5

.028"12.7mm, ⌀14x1.25HR 22

BP4HS

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 4

BP5HS

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 5

BPR5HS

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 5

275

Copper

-

2.9/ 5

.024"12.7mm, ⌀14x1.25HR 6

L92YC

Copper

-

2.9/ 5

.030"12.7mm, ⌀14x1.25HR 92

275

Copper

-

2.9/ 5

.024"12.7mm, ⌀14x1.25HR 6

275

Copper

-

2.9/ 5

.024"12.7mm, ⌀14x1.25HR 6

275

Copper

-

2.9/ 5

.024"12.7mm, ⌀14x1.25HR 6

4123

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 4

WR5BC

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 5

WR6BC NS

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 6

WR5BC+

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 5

WR7BC+

Copper

-

2.9/ 5

.031"12.7mm, ⌀14x1.25HR 7

WR6BC

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 6

L82YC

Copper

-

2.9/ 5

.031"12.7mm, ⌀14x1.25HR 82

L87YC

Copper

-

2.9/ 5

.024"12.7mm, ⌀14x1.25HR 87

L92YC

Copper

-

2.9/ 5

.030"12.7mm, ⌀14x1.25HR 92

RL87YC

Copper

-

2.9/ 5

.039"12.7mm, ⌀14x1.25HR 87

RL95YC

Copper

-

2.9/ 5

.035"12.7mm, ⌀14x1.25HR 95

W16FPR

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 16

W9FP

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 9

BP4HS

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 4

BP4HS-10

Copper

-

2.9/ 5

.039"12.7mm, ⌀14x1.25HR 4

BP5HS

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 5

BP7HS

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 7

BPR4HS-10

Copper

-

2.9/ 5

.039"12.7mm, ⌀14x1.25HR 4

BPR6HS-10

Copper

-

2.9/ 5

.039"12.7mm, ⌀14x1.25HR 6

BPR6HSA

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 6

Bigger gap (1)

0.1..0.3 mm gap increase for better performance given your ignition system can handle it

BPR4HS-10

Copper

-

2.9/ 5

.039"12.7mm, ⌀14x1.25HR 4

One step colder (2)

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

W16FPR

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 16

BPR5HS

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 5

Two steps colder (4)

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

BR6HSA

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 6

BPR6HSA

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 6

BPR6HS

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 6

BPR6HS

Copper

-

2.9/ 5

.028"12.7mm, ⌀14x1.25HR 6