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OE Quality
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AutolitePart #: AR2594
Autolite AR2594 Spark Plug
13 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
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*Free return shipping only qualifies if our fitment verification tool is used.
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Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
High Performance Racing Non-Resistor Spark Plug
Fitment: Mazda and Porsche, 911 and RX-7
Easy Returns — Return within 60 days for a full refund
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Autolite AR2594 Spark Plug
| Brand | Autolite |
|---|---|
| Part Number | AR2594 |
| Position | High Performance Racing Non-Resistor Spark Plug |
| Ground Electrode Tip Design | Tapered |
| Ground Electrode Core Material | Nickel |
| Electrical Terminal Type | Stud |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Pre-Gap Size | 0.025 |
| Pre-Gap Size | 0.60 |
| Ground Electrode Quantity | 1 |
| Hex Size | 13/16" |
| Hex Size | 21 |
| Seat Type | Flat |
| Reach | 0.750 |
| Reach | 19.5 |
| Thread Diameter | 14.0 |
| Resistor Type | No |
| Center Electrode Design | Standard / regular |
| Ground Electrode Tip Material | Nickel |
| Insulator Material | Ceramic |
This part fits 13 vehicles. Search below:
| Year | Make | Model | Submodel | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1980 | Mazda | RX-7 | N/A | Spark Plug fitment: .040" / 1.0mm in OE Style; High Performance Racing Non-Resistor Spark Plug | |||
| 1979 | Mazda | RX-7 | N/A | .040 gap, OE style spark plug fitting; High Performance Racing Non-Resistor Spark Plug | |||
| 1973 | Porsche | 911 | S | 2.4L | H6 | N/A | .022 Gap; High Performance Racing Non-Resistor Spark Plug |
| 1973 | Porsche | 911 | S | 2.3L | H6 | N/A | .022 Gap; OE Style; High Performance Racing Non-Resistor Spark Plug |
| 1972 | Porsche | 911 | S | 2.4L | H6 | N/A | .022 Gap; High Performance Racing Non-Resistor Spark Plug |
| 1972 | Porsche | 911 | S | 2.3L | H6 | N/A | .022 Gap; OE Style; High Performance Racing Non-Resistor Spark Plug |
| 1971 | Porsche | 911 | 2.2L | H6 | N/A | Spark Plug fitment note: Gap at .024 inches.; High Performance Racing Non-Resistor Spark Plug | |
| 1970 | Porsche | 911 | 2.2L | H6 | N/A | Spark Plug fitment note: Gap at .024 inches.; High Performance Racing Non-Resistor Spark Plug | |
| 1969 | Porsche | 911 | 2.0L | H6 | N/A | Spark Plug fitment note: Gap at .024 inches.; High Performance Racing Non-Resistor Spark Plug | |
| 1968 | Porsche | 911 | 2.0L | H6 | N/A | Spark Plug fitment note: Gap at .024 inches.; High Performance Racing Non-Resistor Spark Plug | |
| 1967 | Porsche | 911 | N/A | Spark Plug fitment note: Gap at .024 inches.; High Performance Racing Non-Resistor Spark Plug | |||
| 1966 | Porsche | 911 | N/A | Spark Plug fitment note: Gap at .024 inches.; High Performance Racing Non-Resistor Spark Plug | |||
| 1965 | Porsche | 911 | 2.0L | H6 | N/A | Racing Spark Plug |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
404641XL713805AG091
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.