NGK CR8EIX 4218 Spark Plug

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Rating

3.8 / 5 Overall
NGK	CR8EIX
Brand	Code
4.0 / 5 Materials
Copper	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	Removable Nut
Seat	Terminal
1	Non-Projected
Ground count	Projection

Cross-reference and alternatives

Cross-reference (3)

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

IU24

Copper-Iridium

4.3/ 5

.035"19mm, ⌀10x1HR 24

XS4302

Iridium-Platinum

4.2/ 5

.031"19mm, ⌀10x1HR 1

XS4302DP

Iridium-Platinum

4.2/ 5

.031"19mm, ⌀10x1HR 1

Deep reference (35)

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

DIMR8A10

Iridium-Platinum

4.7/ 5

.039"19mm, ⌀10x1HR 8

SIMR8A9

Iridium-Platinum

4.4/ 5

.035"19mm, ⌀10x1HR 8

IMR8C-9H

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀10x1HR 8

IMR9C-9HES

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀10x1HR 9

CR9EIA-9

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀10x1HR 9

CR9EHI-9

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀10x1HR 9

IMR9D-9H

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀10x1HR 9

CR6EIA-9

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀10x1HR 6

IMR9A-9H

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀10x1HR 9

IMR9C-9H

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀10x1HR 9

IMR9C-9HE

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀10x1HR 9

IU27A

Copper-Iridium

4.0/ 5

.035"19mm, ⌀10x1HR 27

PMR8A

Platinum

-

3.8/ 5

.028"19mm, ⌀10x1HR 8

PMR8B

Platinum

-

3.8/ 5

.028"19mm, ⌀10x1HR 8

CR9EIX

Copper-Iridium

-

3.8/ 5

.031"19mm, ⌀10x1HR 9

CR9EHIX-9

Copper-Iridium

-

3.8/ 5

.035"19mm, ⌀10x1HR 9

PMR9B

Platinum

-

3.8/ 5

.028"19mm, ⌀10x1HR 9

CR9EKPA

Copper-Platinum

3.6/ 5

.031"19mm, ⌀10x1HR 9

C9EHVX-9

Copper-Platinum

3.5/ 5

.035"19mm, ⌀10x1HR 9

CR9EHVX-9

Copper-Platinum

3.5/ 5

.035"19mm, ⌀10x1HR 9

RG6YC

Copper

3.3/ 5

.030"19mm, ⌀10x1HR 6

U27ETR

Copper

3.3/ 5

.028"19mm, ⌀10x1HR 27

CR9EK

Copper

3.3/ 5

.028"19mm, ⌀10x1HR 9

CR10EK

Copper

3.3/ 5

.028"19mm, ⌀10x1HR 10

CR9EKB

Copper

3.3/ 5

.031"19mm, ⌀10x1HR 9

C8E

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 8

CR8E

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 8

CR8EB

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 8

G57C

Copper

2.9/ 5

.030"19mm, ⌀10x1HR 57

C9E

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 9

CR10E

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 10

CR6E

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 6

CR9E

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 9

CR9EB

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 9

CR9EH-9

Copper

2.9/ 5

.035"19mm, ⌀10x1HR 9

Same specs (4)

Products that have identical characteristics that impact interchangability

MR8BI-8

Iridium-Platinum

4.2/ 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

Copper

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