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NGK 91731 Spark PlugOE Quality 60-Day Returns
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Part #: 91731

NGK 91731 Spark Plug

Laser Iridium High Ignitability Spark Plug
⚙️ 16 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$25.01Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
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✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
📦Laser Iridium High Ignitability Spark Plug
🚗Fitment: Porsche, 718 Boxster and 718 Cayman
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
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NGK 91731 Spark Plug
BrandNGK
Part Number91731
PositionLaser Iridium High Ignitability Spark Plug
Part NumberSilkgr9a7eg
Stock Number91731

This part fits 16 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2024Porsche718 Boxster2.5LH4N/A40,000 mi Factory Recommended Service Interval; Laser Iridium High Ignitability Spark Plug
2024Porsche718 Cayman2.5LH4N/A40,000 mi Factory Recommended Service Interval; Laser Iridium High Ignitability Spark Plug
2023Porsche718 Boxster2.5LH4N/A40,000 mi Factory Recommended Service Interval; Laser Iridium High Ignitability Spark Plug
2023Porsche718 Cayman2.5LH4N/A40,000 mi Factory Recommended Service Interval; Laser Iridium High Ignitability Spark Plug
2022Porsche718 Boxster2.5LH4N/A40,000 mi Factory Recommended Service Interval; Laser Iridium High Ignitability Spark Plug
2022Porsche718 Cayman2.5LH4N/A40,000 mi Factory Recommended Service Interval; Laser Iridium High Ignitability Spark Plug
2021Porsche718 Boxster2.5LH4N/A40,000 mi Factory Recommended Service Interval; Laser Iridium High Ignitability Spark Plug
2021Porsche718 Cayman2.5LH4N/A40,000 mi Factory Recommended Service Interval; Laser Iridium High Ignitability Spark Plug
2020Porsche718 Boxster2.5LH4N/AOE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Gap 0.028"; Actual OE Manufacturer; 40,000 mi OE Mfr Recommended Service Interval; Laser Iridium High Ignitability Spark Plug
2020Porsche718 Cayman2.5LH4N/AOE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Gap 0.028"; Actual OE Manufacturer; 40,000 mi OE Mfr Recommended Service Interval; Laser Iridium High Ignitability Spark Plug
2019Porsche718 Boxster2.5LH4N/AOE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Gap 0.028"; Actual OE Manufacturer; 40,000 mi OE Mfr Recommended Service Interval; Laser Iridium High Ignitability Spark Plug
2019Porsche718 Cayman2.5LH4N/AOE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Gap 0.028"; Actual OE Manufacturer; 40,000 mi OE Mfr Recommended Service Interval; Laser Iridium High Ignitability Spark Plug
2018Porsche718 Boxster2.5LH4N/AOE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Gap 0.028"; Actual OE Manufacturer; 40,000 mi OE Mfr Recommended Service Interval; Laser Iridium High Ignitability Spark Plug
2018Porsche718 Cayman2.5LH4N/AOE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Gap 0.028"; Actual OE Manufacturer; 40,000 mi OE Mfr Recommended Service Interval; Laser Iridium High Ignitability Spark Plug
2017Porsche718 Boxster2.5LH4N/AOE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Gap 0.028"; Actual OE Manufacturer; 40,000 mi OE Mfr Recommended Service Interval; Laser Iridium High Ignitability Spark Plug
2017Porsche718 Cayman2.5LH4N/AOE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs.; Gap 0.028"; Actual OE Manufacturer; 40,000 mi OE Mfr Recommended Service Interval; Laser Iridium High Ignitability 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:

91731TBD

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

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