Set of 4 spark plugs Mopar SP143877AB Jeep Dodge RAM Chrysler 2012–25 for 5.7L HEMI engines

Spark Plug Set 4 pcs Mopar SP143877AB Jeep Dodge RAM Chrysler 2012–25 for 5.7L HEMI Engines

Efficiency and Reliability of Original Components

The original Mopar SP143877AB spark plug set is specifically designed for high-performance 5.7L HEMI engines. The use of original components guarantees full compliance with factory tolerances, which is critical for the correct operation of the ignition system in modern Stellantis vehicles (Jeep, Dodge, RAM, Chrysler). These spark plugs provide stable sparking across a wide temperature range, contributing to smooth engine starting and reduced fuel consumption.

Technological Advantages and Service Life

The production of these spark plugs utilizes wear-resistant materials such as iridium and nickel alloys, allowing them to withstand extreme loads in the combustion chambers of HEMI engines. The use of iridium in the center electrode provides a thin and powerful spark, which improves vehicle acceleration and minimizes the risk of misfires. A high-quality ceramic insulator prevents current leakage and protects against carbon buildup, extending the service life of the entire ignition system.

Importance of Timely Replacement

The 5.7L HEMI series engines are equipped with a 16-spark plug system (2 per cylinder), making this 4-piece set a convenient format for partial updates or building a full kit for technical maintenance. Timely installation of new spark plugs prevents increased load on the ignition coils, normalizes exhaust emission levels, and maintains the engine's nominal power.

Compatibility by Model and Production Year

These spark plugs are intended for vehicles with the 5.7L HEMI engine during the following periods:

Technical Characteristics

• Brand: Mopar

• Country of Brand Registration: USA

• Material: Iridium, nickel, ceramic, steel

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

• Color: Silver, white

• Weight: 180 grams

• Condition: New

• Product Group: Engine ignition system

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

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

• Features: Iridium center electrode, high resistance to corrosion and thermal loads

• Included in Kit: 4 spark plugs in individual protective packaging within a general cardboard box

• OEM Number: SP143877AB

• Interchangeable Numbers: 68303913AA, MS851336

• Connection Type: Flat gasket ring

• Electrode Gap: 1.1 mm

• Heat Range: Medium (for high-performance engines)