Spark plug Mopar SP143877AB Jeep Dodge RAM Chrysler 2012–25 for 5.7L HEMI engines 1 pc

Spark Plug Mopar SP143877AB Jeep Dodge RAM Chrysler 2012–25 for 5.7L HEMI engines 1 pc

Purpose and Technological Advantages

The genuine Mopar iridium spark plug is specifically engineered for high-performance engines within the Stellantis group. The primary function of this component is to generate a stable electric arc to ignite the fuel-air mixture within the combustion chamber. Due to the use of precious iridium in the center electrode, the part possesses exceptional wear resistance and is capable of consistent operation under conditions of extreme temperature and pressure. The iridium tip allows for a reduction in the voltage required for spark generation, which facilitates easier engine starting and promotes a smoother idle.

Impact on 5.7L HEMI Engine Performance

HEMI series engines require high ignition precision to achieve their rated power and ensure the correct operation of the Multi-Displacement System (MDS). Installing genuine SP143877AB spark plugs provides:

• Stable Ignition: The ultra-fine electrode creates a powerful spark, improving vehicle throttle response.

• Detonation Protection: A correctly selected heat range prevents pre-ignition of the mixture.

• Fuel Economy: Complete combustion of the mixture reduces fuel consumption and decreases harmful atmospheric emissions.

• Longevity: The iridium composition prevents corrosion and electrical erosion, extending the service interval for replacement up to 160,000 kilometers (according to manufacturer specifications).

Design Features and Authenticity

The spark plug features a ceramic insulator with high dielectric strength and a metal housing with an anti-corrosion galvanic coating. Three distinctive green stripes and manufacturer markings (Bosch or NGK, produced to Mopar specifications) are applied to the insulator. The product is supplied in individual cardboard packaging with a unique OEM number and barcode, guaranteeing protection against counterfeits and full compliance with automotive engineering standards.

Compatibility by Make, Model, and Year

This spark plug is designed for vehicles equipped with the 5.7L V8 HEMI engine. Below is a detailed application table:

Technical Characteristics

• Brand: Mopar

• Country of Brand Registration: USA

• Material: Iridium, ceramics, nickel-plated steel

• Size: Height 82 mm, thread diameter 14 mm, thread length 26.5 mm, hex size 16 mm

• Color: White, silver, green

• Weight: 48 grams

• Condition: New

• Product Group: Ignition system parts

• Purpose: Ignition of fuel-air mixture in internal combustion engines

• Compatibility: 5.7L V8 HEMI engines for Jeep, Dodge, RAM, Chrysler 2012–2025

• Features: Iridium center electrode, high noise immunity, extended service life

• Included in Kit: 1 spark plug, individual cardboard box, protective plastic electrode cap

• OEM Number: SP143877AB

• Alternative Part Numbers: 68303913AA, 68303913AB, SP143877AA, 05149177AB

• Heat Range: 6 (Bosch scale)

• Terminal Type: Solid (for ignition coil)

• Sealing: Metal gasket (non-removable)

• Engineering Number: SP143877AB-004