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ACDELCO 16
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Professional; Rapidfire
ACDelco's RAPIDFIRE Performance Platinum Spark Plugs offer longer life and improved efficiency over time as compared to conventional spark plugs.

The RAPIDFIRE Platinum Spark Plug design features:
  • Ribless insulator that may improve the plug-to-boot seal.
  • Tapered center wire electrode with a platinum pad that reduces the firing diameter and helps improve the firing efficiency by concentrating and directing energy needed to fire the plug with less voltage.
  • One-piece integral suppressor seal that helps reduce radio frequency interference, meters spark plug energy to help provide long electrode life, and seals against compression leakage.
  • Reduced sparking voltage & greater corrosion protection when compared to conventional spark plugs.
  • Fits engines that run conventional plugs, as well as newer vehicles that require platinum plugs Includes several marine applications.

Spark Plug Type Performance Differences

Resistance6-15
Ground Electrode Tip DesignNone
Ground ConfigurationNone
Ground Electrode Core MaterialNickel
Center Electrode Core MaterialCu-core Ni
Center Electrode Tip MaterialPt pad
Gap Size0.051 IN
Gap Size1.25 mm
Ground Electrode Quantity1
Hex Size16
Insulator Height52.06999999999999 MM
Manufacturer Heat Range12
Approximate Resistor Value6-15k ohms
Seat TypeConical
Reach0.68 IN
Reach17.5 mm
Thread Diameter14 MM
Resistor TypeYes

ACDELCO Warranty Information
Lifetime for ignition wires, gas-charged shocks & struts, belts, hoses, universal joints, steering racks & gears, and ACDelco Professional chassis parts. Limited lifetime wear-out warranty for DuraStop brake pads and shoes. All other DuraStop brake parts, carry a limited 12 months/12,000 mile warranty. 24 months/24,000 miles for load-carrying and air-adjustable shocks, steering dampers. 24 months/24,000 miles for Professional New and Reman Alternators and Starters purchased on or after 3/1/12. Limited Lifetime for Professional Reman Alternators and Starters purchased before 3/1/12. 3 Year for RapidFire Performance Spark Plugs, 100,000 miles for Professional Platinum Spark Plugs, 100,000 miles for Iridium Spark Plugs. Limited Lifetime for Radiators purchased on or after 1/1/2015. 12 months/12,000 miles for other parts. Warranty returns can not be processed without complete VIN information on return instructions. IMPORTANT A/C COMPRESSOR WARRANTY NOTE: If the A/C system or the vehicle is five years or older, ACDelco requires a system flush and proof of purchase of an A/C Orifice Tube or A/C Expansion Valve for an A/C Compressor warranty to be valid.
Warranty Details