NGK R2525-9 Spark Plug

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Rating

3.8 / 5 Overall
NGK	R2525-9
Brand	Code
3.5 / 5 Materials
Copper	Platinum
Ground electrode	Center electrode
4.5 / 5 Design
Slant	Fine Wire
Ground type	Center type

Specifications

0.6mm (.024")	9
Gap	Heat range
⌀12mm	1.25mm
Thread diameter	Thread pitch
19mm (3/4")	16mm (5/8")
Reach	Hex size
Gasket	Removable Nut
Seat	Terminal
1	Non-Projected
Ground count	Projection

Cross-reference and alternatives

Cross-reference (1)

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

IXU01-27

Iridium-Platinum

4.5/ 5

.024"19mm, ⌀12x1.25HR 27

One step colder (2)

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

IXU01-31

Iridium-Platinum

4.5/ 5

.024"19mm, ⌀12x1.25HR 31

R2525-10

Copper-Platinum

-

3.8/ 5

.024"19mm, ⌀12x1.25HR 10

Two steps colder (1)

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

IXU01-34

Iridium-Platinum

4.5/ 5

.024"19mm, ⌀12x1.25HR 34