NGK R5530-8 Spark Plug

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Rating

3.8 / 5 Overall
NGK	R5530-8
Brand	Code
3.7 / 5 Materials
Platinum	Gold-Palladium
Ground electrode	Center electrode
4.0 / 5 Design
Flat	Fine Wire
Ground type	Center type

Specifications

0.65mm (.026")	8
Gap	Heat range
⌀14mm	1.25mm
Thread diameter	Thread pitch
12.7mm (1/2")	21mm (13/16")
Reach	Hex size
Gasket	Solid
Seat	Terminal
1	Non-Projected
Ground count	Projection

Cross-reference and alternatives

One step colder (1)

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

R5530-9

Gold-Palladium-Platinum

-

3.8/ 5

.026"12.7mm, ⌀14x1.25HR 9

Two steps colder (1)

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

R5530-10

Gold-Palladium-Platinum

-

3.8/ 5

.026"12.7mm, ⌀14x1.25HR 10