Denso U20EPR9 Spark Plug

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Rating
Brand	Code
2.9 / 5 Overall
Denso	U20EPR9
3.0 / 5 Materials
Copper	Copper
Ground electrode	Center electrode
2.8 / 5 Design
Standard	Standard
Ground type	Center type

Specifications
Gap	Heat range
0.9mm (.035")	20
⌀10mm	1mm
Thread diameter	Thread pitch
19mm (3/4")	16mm (5/8")
Reach	Hex size
Gasket	Threaded Stud
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

CPR6EA-9

Copper

2.9/ 5

.035"19mm, ⌀10x1HR 6

Same specs (2)

Products that have identical characteristics that impact interchangability

CPR6EA-9S

Copper

2.9/ 5

.035"19mm, ⌀10x1HR 6

CPR6EB-9

Copper

2.9/ 5

.035"19mm, ⌀10x1HR 6

One step colder (2)

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

CPR7EAIX-9

Copper-Iridium

3.8/ 5

.035"19mm, ⌀10x1HR 7

CPR7EA-9

Copper

2.9/ 5

.035"19mm, ⌀10x1HR 7

Two steps colder (4)

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

CR8EHIX-9

Copper-Iridium

3.8/ 5

.035"19mm, ⌀10x1HR 8

CPR8EAIX-9

Copper-Iridium

3.8/ 5

.035"19mm, ⌀10x1HR 8

CPR8EA-9

Copper

2.9/ 5

.035"19mm, ⌀10x1HR 8

CPR8EB-9

Copper

2.9/ 5

.035"19mm, ⌀10x1HR 8