NGK MR8BI-8 91360 Spark Plug

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Rating

4.2 / 5 Overall
NGK	MR8BI-8
Brand	Code
4.5 / 5 Materials
Platinum	Iridium
Ground electrode	Center electrode
3.5 / 5 Design
Standard	Fine Wire
Ground type	Center type

Specifications

0.8mm (.031")	8
Gap	Heat range
⌀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

Same specs (4)

Products that have identical characteristics that impact interchangability

CR8EIX

Copper-Iridium

3.8/ 5

.031"19mm, ⌀10x1HR 8

U24ESR-N

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 24

CR8E

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 8

CR8EB

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2.9/ 5

.031"19mm, ⌀10x1HR 8

Bigger gap (7)

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

IMR8C-9H

Iridium-Platinum

-

4.2/ 5

.035"19mm, ⌀10x1HR 8

CR8EIA-9

Iridium-Platinum

-

4.2/ 5

.035"19mm, ⌀10x1HR 8

CR8EIA-10

Iridium-Platinum

-

4.2/ 5

.039"19mm, ⌀10x1HR 8

CR8EIB-10

Iridium-Platinum

-

4.2/ 5

.039"19mm, ⌀10x1HR 8

CR8EIB-9

Iridium-Platinum

-

4.2/ 5

.035"19mm, ⌀10x1HR 8

MR8AI9

Iridium-Platinum

-

4.2/ 5

.035"19mm, ⌀10x1HR 8

CR8EH-9

Copper

2.9/ 5

.035"19mm, ⌀10x1HR 8

One step colder (5)

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

CR9EIX

Copper-Iridium

3.8/ 5

.031"19mm, ⌀10x1HR 9

U27ESRN

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 27

CR9EB BLYB

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 9

CR9EB

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 9

CR9E

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 9

Two steps colder (3)

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

CR10EIX

Copper-Iridium

3.8/ 5

.031"19mm, ⌀10x1HR 10

U31ESRN

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 31

CR10E

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 10