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Champion 121S Spark Plug

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Champion 121S image
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Rating
2.9 / 5
Overall
Champion121S
BrandCode
3.0 / 5
Materials
CopperCopper
Ground electrodeCenter electrode
2.8 / 5
Design
StandardStandard
Ground typeCenter type
Specifications
1mm (.039")8
GapHeat range
⌀14mm1.25mm
Thread diameterThread pitch
11mm (7/16")16mm (5/8")
ReachHex size
TaperedSolid
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
.031"11.6mm, ⌀14x1.25HR 6

Deep reference (4)

A second level of cross-reference: if A=B and B=C, then A=C
Copper
3.3/ 5
.035"11.6mm, ⌀14x1.25HR 20
Copper
-
2.9/ 5
.035"11mm, ⌀14x1.25HR 2
Copper
-
2.9/ 5
.039"11mm, ⌀14x1.25HR 4
Copper
-
2.9/ 5
.039"11mm, ⌀14x1.25HR 8

Same specs (2)

Products that have identical characteristics that impact interchangability
Copper
-
2.9/ 5
.039"11mm, ⌀14x1.25HR 8
Copper
-
2.9/ 5
.039"11mm, ⌀14x1.25HR 8