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Bosch HR8DCX+ 7971 Spark Plug

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Bosch HR8DCX+ 7971 image
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Rating
2.9 / 5
Overall
BoschHR8DCX+
BrandCode
3.0 / 5
Materials
CopperCopper
Ground electrodeCenter electrode
2.8 / 5
Design
StandardStandard
Ground typeCenter type
Specifications
1.1mm (.043")8
GapHeat range
⌀14mm1.25mm
Thread diameterThread pitch
17.5mm (.689")16mm (5/8")
ReachHex size
TaperedRemovable Nut
SeatTerminal
1Non-Projected
Ground countProjection

Cross-reference and alternatives

How we find alternative spark plugs How we rate spark plugs

Cross-reference (1)

Alternative spark plugs found in cross-reference docs provided by manufacturers
Copper
-
2.9/ 5
.050"17.5mm, ⌀14x1.25HR 2

Deep reference (13)

A second level of cross-reference: if A=B and B=C, then A=C
Copper-Iridium
4.3/ 5
.043"17.5mm, ⌀14x1.25HR 20
Iridium-Platinum
4.2/ 5
.043"17.5mm, ⌀14x1.25HR 20
Copper
3.3/ 5
.031"18mm, ⌀14x1.25HR 16
Copper
3.3/ 5
.031"18mm, ⌀14x1.25HR 20
Copper
3.3/ 5
.031"18mm, ⌀14x1.25HR 20
Copper
3.2/ 5
.063"17.5mm, ⌀14x1.25HR 7
Copper
3.1/ 5
.028"18mm, ⌀14x1.25HR 6
Copper
-
2.9/ 5
.031"17.5mm, ⌀14x1.25HR 8
Copper
-
2.9/ 5
.043"17.5mm, ⌀14x1.25HR 8
Copper
-
2.9/ 5
.031"17.5mm, ⌀14x1.5HR 9
Copper
-
2.9/ 5
.035"17.5mm, ⌀14x1.25HR 9
Copper
-
2.9/ 5
.045"17.5mm, ⌀14x1.25HR 14
Copper
-
2.9/ 5
.031"18mm, ⌀14x1.25HR 6

Same specs (3)

Products that have identical characteristics that impact interchangability
Iridium
4.5/ 5
.043"17.5mm, ⌀14x1.25HR 8
Platinum
3.8/ 5
.043"17.5mm, ⌀14x1.25HR 8
Copper-Platinum
3.5/ 5
.043"17.5mm, ⌀14x1.25HR 8

Bigger gap (3)

0.1..0.3 mm gap increase for better performance given your ignition system can handle it
Iridium
4.5/ 5
.050"17.5mm, ⌀14x1.25HR 8
Platinum
3.8/ 5
.050"17.5mm, ⌀14x1.25HR 8
Copper
-
2.9/ 5
.050"17.5mm, ⌀14x1.25HR 8

One step colder (2)

Colder spark plugs with same characteristics for moderately tuned engines (75–100 hp increase)
Iridium
4.5/ 5
.043"17.5mm, ⌀14x1.25HR 6
Platinum
3.8/ 5
.043"17.5mm, ⌀14x1.25HR 6