Bosch HR8DC+ Spark Plug

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Rating

2.9 / 5 Overall
Bosch	HR8DC+
Brand	Code
3.0 / 5 Materials
Copper	Copper
Ground electrode	Center electrode
2.8 / 5 Design
Standard	Standard
Ground type	Center type

Specifications

0.8mm (.031")	8
Gap	Heat range
⌀14mm	1.25mm
Thread diameter	Thread pitch
17.5mm (.689")	16mm (5/8")
Reach	Hex size
Tapered	Removable Nut
Seat	Terminal
1	Non-Projected
Ground count	Projection

Cross-reference and alternatives

Bigger gap (7)

0.1..0.3 mm gap increase for better performance given your ignition system can handle it

HR8LII33U

Iridium

4.5/ 5

.039"17.5mm, ⌀14x1.25HR 8

HR8DII33X

Iridium

4.5/ 5

.043"17.5mm, ⌀14x1.25HR 8

HR8LPP33U

Platinum

3.8/ 5

.039"17.5mm, ⌀14x1.25HR 8

HR8DPP33X

Platinum

3.8/ 5

.043"17.5mm, ⌀14x1.25HR 8

HR8LPP30U

Copper-Platinum

3.5/ 5

.039"17.5mm, ⌀14x1.25HR 8

HR8DPP30X

Copper-Platinum

3.5/ 5

.043"17.5mm, ⌀14x1.25HR 8

HR8DCX+

Copper

-

2.9/ 5

.043"17.5mm, ⌀14x1.25HR 8

One step colder (1)

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

HR7DC+ 7918

Copper

-

2.9/ 5

.031"17.5mm, ⌀14x1.25HR 7