Bosch HR9BPX+ 4008 Spark Plug

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Rating

3.3 / 5 Overall
Bosch	HR9BPX+
Brand	Code
3.5 / 5 Materials
Copper	Platinum
Ground electrode	Center electrode
2.8 / 5 Design
Standard	Standard
Ground type	Center type

Specifications

1.1mm (.043")	9
Gap	Heat range
⌀14mm	1.25mm
Thread diameter	Thread pitch
12.7mm (1/2")	16mm (5/8")
Reach	Hex size
Tapered	Solid
Seat	Terminal
4	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)

HR8BPX+

Copper-Platinum

-

3.3/ 5

.043"12.7mm, ⌀14x1.25HR 8