Champion RG4PHP Spark Plug

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Rating
Brand	Code
3.6 / 5 Overall
Champion	RG4PHP
4.0 / 5 Materials
Platinum	Platinum
Ground electrode	Center electrode
2.8 / 5 Design
Standard	Standard
Ground type	Center type

Specifications
Gap	Heat range
0.5mm (.020")	4
⌀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 (3)

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

IU27

Copper-Iridium

4.3/ 5

.035"19mm, ⌀10x1HR 27

PMR8A

Platinum

3.8/ 5

.028"19mm, ⌀10x1HR 8

MR7F

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 7

Deep reference (8)

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

IU24

Copper-Iridium

4.3/ 5

.035"19mm, ⌀10x1HR 24

CR9EIX

Copper-Iridium

3.8/ 5

.031"19mm, ⌀10x1HR 9

PMR9B

Platinum

3.8/ 5

.028"19mm, ⌀10x1HR 9

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

RG4HC

Copper

2.9/ 5

.028"19mm, ⌀10x1HR 4

RG4YCX

Copper

2.9/ 5

.030"19mm, ⌀10x1HR 4

Bigger gap (4)

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

RG4HC

Copper

2.9/ 5

.028"19mm, ⌀10x1HR 4

309E

Copper

2.9/ 5

.028"19mm, ⌀10x1HR 4

8654E

Copper

2.9/ 5

.030"19mm, ⌀10x1HR 59

U27ESN

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 27