Bosch HR9KII33Y 9601 Spark Plug

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Rating

4.5 / 5 Overall
Bosch	HR9KII33Y
Brand	Code
5.0 / 5 Materials
Iridium	Iridium
Ground electrode	Center electrode
3.5 / 5 Design
Standard	Fine Wire
Ground type	Center type

Specifications

1.5mm (.059")	9
Gap	Heat range
⌀14mm	1.25mm
Thread diameter	Thread pitch
17.5mm (.689")	16mm (5/8")
Reach	Hex size
Tapered	Solid
Seat	Terminal
1	Non-Projected
Ground count	Projection

Cross-reference and alternatives

Same specs (4)

Products that have identical characteristics that impact interchangability

HR9DI33Y

Copper-Iridium

3.8/ 5

.059"17.5mm, ⌀14x1.25HR 9

HR9DPP33Y

Platinum

3.8/ 5

.059"17.5mm, ⌀14x1.25HR 9

HR9DPP30Y

Copper-Platinum

3.5/ 5

.059"17.5mm, ⌀14x1.25HR 9

HR9DCY+

Copper

2.9/ 5

.059"17.5mm, ⌀14x1.25HR 9

One step colder (3)

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

HR8KII33Y

Iridium

-

4.5/ 5

.059"17.5mm, ⌀14x1.25HR 8

HR8DPP33Y

Platinum

3.8/ 5

.059"17.5mm, ⌀14x1.25HR 8

HR8DPP30Y

Copper-Platinum

3.5/ 5

.059"17.5mm, ⌀14x1.25HR 8

Two steps colder (2)

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

HR7DPP33Y

Platinum

3.8/ 5

.059"17.5mm, ⌀14x1.25HR 7

HR7DPP30Y

Copper-Platinum

3.5/ 5

.059"17.5mm, ⌀14x1.25HR 7