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ACDelco 41-110 12621258 Iridium Spark Plugs Set of 8 PCM ZR6 Indmar LY6 6.0L GM
Listed on eBay by warehouse11store · 98.7% positive
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$47
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About this item
This is a full set of 8 ACDelco 41-110 (GM 12621258) iridium spark plugs built for marine 6.0L engines. They work with PCM ZR6, Indmar LY6 6.0L, LS3 6.2L, and Crusader GM-based 6.0L setups. Each plug has a single ground electrode, measures 25mm in length with a 17.5mm thread reach, and needs its gap checked before install — .040in for PCM, .050in for Indmar. Good for anyone doing a full plug replacement on these marine engine builds.
- Set of 8 ACDelco iridium spark plugs, part number 41-110 / GM 12621258
- Single ground electrode design, 25mm length, 17.5mm (0.680in) thread reach
- Fits PCM ZR6 6.0L, Indmar LY6 6.0L, LS3 6.2L, and Crusader GM-based 6.0L marine engines
- Also supersedes part numbers 12609877, 12571164, 41-993, 41-974, 41-985
- Gap before installing: .040in for PCM engines, .050in for Indmar engines
- Runs on gasoline, sold as a full set of 8 plugs
Specifications
- Type
- Spark Plug
- Brand
- ACDelco
- Hex Size
- 16mm
- Material
- Iridium
- Quantity
- Set of 8
- Resistor
- Yes
- Fuel Type
- Gasoline
- Item Length
- 25 mm
- Vintage Part
- No
- Configuration
- Single
- Recommended Use
- Marine Engine
- Country of Origin
- United States
- Installation Depth
- 17.5mm (0.680")
- OE/OEM Part Number
- 12621258
- Superseded Part Number
- 12609877, 12571164, 41-993, 41-974, 41-985
- Interchange Part Number
- PZTR5A-15, 3861326, RP030011, 491009
- Manufacturer Part Number
- 41-110