Champion RG4HC Spark Plug

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Rating

2.9 / 5 Overall
Champion	RG4HC
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
⌀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

Cross-reference (3)

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

IU27

Copper-Iridium

4.3/ 5

.035"19mm, ⌀10x1HR 27

CR9EB

Copper

-

2.9/ 5

.031"19mm, ⌀10x1HR 9

CR9E

Copper

-

2.9/ 5

.031"19mm, ⌀10x1HR 9

Deep reference (14)

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

IU27

Copper-Iridium

4.3/ 5

.035"19mm, ⌀10x1HR 27

IU27

Copper-Iridium

4.3/ 5

.035"19mm, ⌀10x1HR 27

XS4302

Iridium-Platinum

4.2/ 5

.031"19mm, ⌀10x1HR 1

XS4302

Iridium-Platinum

4.2/ 5

.031"19mm, ⌀10x1HR 1

CR9EIX

Copper-Iridium

3.8/ 5

.031"19mm, ⌀10x1HR 9

PMR9B

Platinum

3.8/ 5

.028"19mm, ⌀10x1HR 9

RG4PHP

Platinum

3.6/ 5

.020"19mm, ⌀10x1HR 4

C9E

Copper

-

2.9/ 5

.031"19mm, ⌀10x1HR 9

CR9E

Copper

-

2.9/ 5

.031"19mm, ⌀10x1HR 9

CR9EB

Copper

-

2.9/ 5

.031"19mm, ⌀10x1HR 9

4302

Copper

-

2.9/ 5

.031"19mm, ⌀10x1HR 1

RG6HCC

Copper

-

2.9/ 5

.033"19mm, ⌀10x1HR 6

U27ESRN

Copper

-

2.9/ 5

.031"19mm, ⌀10x1HR 27

4302

Copper

-

2.9/ 5

.031"19mm, ⌀10x1HR 1

Same specs (1)

Products that have identical characteristics that impact interchangability

309E

Copper

-

2.9/ 5

.028"19mm, ⌀10x1HR 4

Bigger gap (2)

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

U27ESN

Copper

-

2.9/ 5

.031"19mm, ⌀10x1HR 27

U27FE9

Copper

-

2.9/ 5

.035"19mm, ⌀10x1HR 27