8 Fairfax St SE
NAPA Auto Parts Genuine Parts Company
8 Fairfax St SE
Leesburg,  VA  20175
(703) 777-2055
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Store Hours
Mon-Fri:7:30 AM-7:00 PM
Sat:8:00 AM-5:00 PM
Sun:9:00 AM-5:00 PM
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ACDelco GM Original Equipment Iridium Spark Plug
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ACDelco GM Original Equipment Iridium Spark Plug

Part #: AC 41993
Line: ACDelco

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Features & Benefits

Warranty: Standard : See Manufacturer's Complete Written Policy


ACDelco Professional Iridium Spark Plugs Are The High Quality Replacement Ideal For Many Vehicles On The Road Today. They Are Our Latest In Spark Plug Technology & An Exact Replacement For Your Vehicle’s Original Components. Iridium Composition Provides A High Melting Point & Great Strength, & Provides Excellent Wear Resistance & Durability. These Premium Aftermarket Replacement Spark Plugs Are Manufactured To Meet Your Expectations For Fit, Form, & Function.

  • Iridium Offers Excellent Engine Idle Stability & Smooth Performance
  • Iridium Allows For Small, Efficient Electrode Designs For Reliable Cold Starting & Quick Acceleration
  • Iridium Fine-wire Electrode Helps Burn Away Carbon Deposits On The Tip Of The Plug As They Form
  • One Piece Suppressor Seal Helps Block Radio Frequencies That Can Affect Vehicle Electronics
  • Suppressor Seal Meters Spark Energy For Long Electrode Life & Helps Prevent Combustion Leakage


Manufacturer Part Number 41-993
Spark Plug Reach 17.5 mm
VMRS Code 033003005
Spark Plug Seat Type Gasket
Quality Level Best
Spark Plug Heat Range NGK4
Brand ACDelco
Spark Plug Thread Size 14 mm
Gap Size 0.06
Seat Type Gasket
Electrode Core Material Iridium
Spark Plug Hex Size 16 mm
Hex Size 16 mm

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