Denso U27ESRN Spark Plug

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Rating
Brand	Code
2.9 / 5 Overall
Denso	U27ESRN
3.0 / 5 Materials
Copper	Copper
Ground electrode	Center electrode
2.8 / 5 Design
Standard	Standard
Ground type	Center type

Specifications
Gap	Heat range
0.8mm (.031")	27
⌀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

CR9E

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 9

Deep reference (5)

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

XS4302

Iridium-Platinum

4.2/ 5

.031"19mm, ⌀10x1HR 1

RG4HC

Copper

2.9/ 5

.028"19mm, ⌀10x1HR 4

RG6HCC

Copper

2.9/ 5

.033"19mm, ⌀10x1HR 6

4302

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 1

Same specs (3)

Products that have identical characteristics that impact interchangability

CR9EIX

Copper-Iridium

3.8/ 5

.031"19mm, ⌀10x1HR 9

CR9EB BLYB

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 9

CR9EB

Copper

2.9/ 5

.031"19mm, ⌀10x1HR 9

Bigger gap (4)

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

CR9EIB-9

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀10x1HR 9

IMR9D-9H

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀10x1HR 9

CR9EIA-9

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀10x1HR 9

CR9EH-9

Copper

2.9/ 5

.035"19mm, ⌀10x1HR 9

One step colder (3)

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