Denso K16R-U Spark Plug

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Rating

3.3 / 5 Overall
Denso	K16R-U
Brand	Code
3.0 / 5 Materials
Copper	Copper
Ground electrode	Center electrode
4.0 / 5 Design
U-Groove	Standard
Ground type	Center type

Specifications

0.8mm (.031")	16
Gap	Heat range
⌀14mm	1.25mm
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 (2)

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

BKR5EY

Copper

3.1/ 5

.035"19mm, ⌀14x1.25HR 5

BKR5EYA

Copper

3.1/ 5

.031"19mm, ⌀14x1.25HR 5

Deep reference (6)

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

XST3926

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀14x1.25HR 5

VK16

Iridium-Platinum

4.2/ 5

.043"19mm, ⌀14x1.25HR 16

XS3924

Iridium-Platinum

4.2/ 5

.045"19mm, ⌀14x1.25HR 3

XST3924

Iridium-Platinum

4.2/ 5

.045"19mm, ⌀14x1.25HR 3

VK16

Iridium-Platinum

4.2/ 5

.043"19mm, ⌀14x1.25HR 16

AR3924

Copper

-

3.3/ 5

.045"19mm, ⌀14x1.25HR 3

Same specs (3)

Products that have identical characteristics that impact interchangability

Q16R-U

Copper

-

3.3/ 5

.031"19mm, ⌀14x1.25HR 16

Q16PR-U

Copper

-

3.3/ 5

.031"19mm, ⌀14x1.25HR 16

K16PR-U

Copper

-

3.3/ 5

.031"19mm, ⌀14x1.25HR 16

Bigger gap (6)

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

IQ16

Copper-Iridium

4.3/ 5

.043"19mm, ⌀14x1.25HR 16

IK16G

Copper-Iridium

4.3/ 5

.043"19mm, ⌀14x1.25HR 16

Q16R-U11

Copper

-

3.3/ 5

.043"19mm, ⌀14x1.25HR 16

K16R-U11

Copper

-

3.3/ 5

.043"19mm, ⌀14x1.25HR 16

K16PR-U11

Copper

-

3.3/ 5

.043"19mm, ⌀14x1.25HR 16

Q16PR-U11

Copper

-

3.3/ 5

.043"19mm, ⌀14x1.25HR 16

One step colder (4)

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

Q20PR-U

Copper

-

3.3/ 5

.031"19mm, ⌀14x1.25HR 20

K20R-U

Copper

-

3.3/ 5

.031"19mm, ⌀14x1.25HR 20

Q20R-U

Copper

-

3.3/ 5

.031"19mm, ⌀14x1.25HR 20

K20PR-U

Copper

-

3.3/ 5

.031"19mm, ⌀14x1.25HR 20

Two steps colder (5)

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

IQ22

Copper-Iridium

4.3/ 5

.031"19mm, ⌀14x1.25HR 22

IK22

Copper-Iridium

4.3/ 5

.031"19mm, ⌀14x1.25HR 22

IK22G

Copper-Iridium

4.3/ 5

.031"19mm, ⌀14x1.25HR 22

Q22PR-U

Copper

-

3.3/ 5

.031"19mm, ⌀14x1.25HR 22

K22PR-U

Copper

-

3.3/ 5

.031"19mm, ⌀14x1.25HR 22