Autolite AP66 Spark Plug

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Rating

3.2 / 5 Overall
Autolite	AP66
Brand	Code
3.5 / 5 Materials
Copper	Platinum
Ground electrode	Center electrode
2.5 / 5 Design
Standard	Necked Down
Ground type	Center type

Specifications

0.9mm (.035")	12
Gap	Heat range
⌀14mm	1.25mm
Thread diameter	Thread pitch
19mm (3/4")	21mm (13/16")
Reach	Hex size
Gasket	Removable Nut
Seat	Terminal
1	Non-Projected
Ground count	Projection

Cross-reference and alternatives

Cross-reference (3)

Alternative spark plugs found in cross-reference docs provided by manufacturers

BPR5EIX

Copper-Iridium

3.8/ 5

.031"19mm, ⌀14x1.25HR 5

BPR5EGP

Copper-Platinum

3.5/ 5

.039"19mm, ⌀14x1.25HR 5

WR9DPX

Copper-Platinum

3.3/ 5

.043"19mm, ⌀14x1.25HR 9

Deep reference (16)

A second level of cross-reference: if A=B and B=C, then A=C

XS65

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀14x1.25HR 10

XS65DP

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀14x1.25HR 10

VW16

Iridium-Platinum

4.2/ 5

.043"19mm, ⌀14x1.25HR 16

VW16

Iridium-Platinum

4.2/ 5

.043"19mm, ⌀14x1.25HR 16

VW16

Iridium-Platinum

4.2/ 5

.043"19mm, ⌀14x1.25HR 16

W16EXZU

Copper-Platinum

3.9/ 5

.028"19mm, ⌀14x1.25HR 16

BPR5EIX-11

Copper-Iridium

3.8/ 5

.043"19mm, ⌀14x1.25HR 5

APP646

Platinum

3.5/ 5

.050"19mm, ⌀14x1.25HR 12

APP66

Platinum

3.5/ 5

.035"19mm, ⌀14x1.25HR 12

242225538

Copper-Silver

3.3/ 5

.024"19mm, ⌀14x1.25HR 9

RN14PMC3

Copper-Platinum

3.3/ 5

.030"19mm, ⌀14x1.25HR 14

RN14PMC5

Copper-Platinum

3.3/ 5

.049"19mm, ⌀14x1.25HR 14

W14EXR-U11

Copper

3.3/ 5

.043"19mm, ⌀14x1.25HR 14

AP2744

Copper-Platinum

-

3.2/ 5

.039"19mm, ⌀14x1.25HR 9

AP65DP2

Copper-Platinum

-

3.2/ 5

.035"19mm, ⌀14x1.25HR 10

BPR5ES-11

Copper

2.9/ 5

.043"19mm, ⌀14x1.25HR 5

Same specs (8)

Products that have identical characteristics that impact interchangability

XS65

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀14x1.25HR 10

XS65DP

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀14x1.25HR 10

APP66

Platinum

3.5/ 5

.035"19mm, ⌀14x1.25HR 12

AP65DP2

Copper-Platinum

-

3.2/ 5

.035"19mm, ⌀14x1.25HR 10

65DP2

Copper

2.9/ 5

.035"19mm, ⌀14x1.25HR 10

66

Copper

2.9/ 5

.035"19mm, ⌀14x1.25HR 12

66BP

Copper

2.9/ 5

.035"19mm, ⌀14x1.25HR 12

66DP2

Copper

2.9/ 5

.035"19mm, ⌀14x1.25HR 12

Bigger gap (4)

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

XP64DP2

Iridium-Platinum

4.2/ 5

.043"19mm, ⌀14x1.25HR 9

AP64DP2

Copper-Platinum

-

3.2/ 5

.043"19mm, ⌀14x1.25HR 9

64DP

Copper

2.9/ 5

.043"19mm, ⌀14x1.25HR 9

64DP2

Copper

2.9/ 5

.043"19mm, ⌀14x1.25HR 9