NGK SILFR5A11 Spark Plug

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Rating

4.2 / 5 Overall
NGK	SILFR5A11
Brand	Code
4.5 / 5 Materials
Platinum	Iridium
Ground electrode	Center electrode
3.5 / 5 Design
Standard	Fine Wire
Ground type	Center type

Specifications

1.1mm (.043")	5
Gap	Heat range
⌀14mm	1.25mm
Thread diameter	Thread pitch
26.5mm (1.04")	16mm (5/8")
Reach	Hex size
Gasket	Solid
Seat	Terminal
1	Non-Projected
Ground count	Projection

Cross-reference and alternatives

Same specs (8)

Products that have identical characteristics that impact interchangability

SK16HR11

Iridium-Platinum

-

4.2/ 5

.043"26.5mm, ⌀14x1.25HR 16

VKH16

Iridium-Platinum

-

4.2/ 5

.043"26.5mm, ⌀14x1.25HR 16

ILFR5B11

Iridium-Platinum

-

4.2/ 5

.043"26.5mm, ⌀14x1.25HR 5

ILFR5T11

Iridium-Platinum

-

4.2/ 5

.043"26.5mm, ⌀14x1.25HR 5

LFR5AIX-11

Copper-Iridium

3.8/ 5

.043"26.5mm, ⌀14x1.25HR 5

PLFR5A-11

Platinum

3.8/ 5

.043"26.5mm, ⌀14x1.25HR 5

LFR5A-11 BLYB

Copper

3.1/ 5

.043"26.5mm, ⌀14x1.25HR 5

LFR5A-11

Copper

3.1/ 5

.043"26.5mm, ⌀14x1.25HR 5

One step colder (11)

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

SK20HR11

Iridium-Platinum

-

4.2/ 5

.043"26.5mm, ⌀14x1.25HR 20

SK20HPR-L11

Iridium-Platinum

-

4.2/ 5

.043"26.5mm, ⌀14x1.25HR 20

SK20HR-A11

Iridium-Platinum

-

4.2/ 5

.043"26.5mm, ⌀14x1.25HR 20

VKH20

Iridium-Platinum

-

4.2/ 5

.043"26.5mm, ⌀14x1.25HR 20

ILFR6J-11K

Iridium-Platinum

-

4.2/ 5

.043"26.5mm, ⌀14x1.25HR 6

ILFR6T-11

Iridium-Platinum

-

4.2/ 5

.043"26.5mm, ⌀14x1.25HR 6

PLFR6A-11

Platinum

3.8/ 5

.043"26.5mm, ⌀14x1.25HR 6

LFR6AIX-11

Copper-Iridium

3.8/ 5

.043"26.5mm, ⌀14x1.25HR 6

LFR6A-11

Copper

3.1/ 5

.043"26.5mm, ⌀14x1.25HR 6

LFR6A-11 BLYB

Copper

3.1/ 5

.043"26.5mm, ⌀14x1.25HR 6

LFR6C-11

Copper

3.1/ 5

.043"26.5mm, ⌀14x1.25HR 6