NGK PMR7A 4259 Spark Plug

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Rating
Brand	Code
3.8 / 5 Overall
NGK	PMR7A
4.0 / 5 Materials
Platinum	Platinum
Ground electrode	Center electrode
3.5 / 5 Design
Standard	Fine Wire
Ground type	Center type

Specifications
Gap	Heat range
0.7mm (.028")	7
⌀10mm	1mm
Thread diameter	Thread pitch
19mm (3/4")	16mm (5/8")
Reach	Hex size
Gasket	Solid
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

IU22

Copper-Iridium

4.3/ 5

.035"19mm, ⌀10x1HR 22

Deep reference (7)

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

CR7EIX

Copper-Iridium

3.8/ 5

.031"19mm, ⌀10x1HR 7

ZMR7AP

Copper-Platinum

3.5/ 5

.024"19mm, ⌀10x1HR 7

CR7EK

Copper

3.3/ 5

.028"19mm, ⌀10x1HR 7

CR7EKB

Copper

3.3/ 5

.031"19mm, ⌀10x1HR 7

C7E

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 7

CR7E

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 7

CR7EB

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 7

Bigger gap (7)

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

CR7EIA-9

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀10x1HR 7

MR7BI-8

Iridium-Platinum

4.2/ 5

.031"19mm, ⌀10x1HR 7

CR7EIX

Copper-Iridium

3.8/ 5

.031"19mm, ⌀10x1HR 7

U22ESR-N

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 22

CR7EH-9

Copper

2.9/ 5

.035"19mm, ⌀10x1HR 7

CR7E

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 7

CR7EB

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 7

One step colder (2)

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

PMR8A

Platinum

3.8/ 5

.028"19mm, ⌀10x1HR 8

PMR8B

Platinum

3.8/ 5

.028"19mm, ⌀10x1HR 8

Two steps colder (1)

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

PMR9B

Platinum

3.8/ 5

.028"19mm, ⌀10x1HR 9