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

Spark Plug Set 16 pcs Mopar SP143877AB Jeep Dodge RAM Chrysler 2012–25 for 5.7L HEMI Engines

Complete Set for Comprehensive HEMI Engine Service

This set includes 16 original Mopar SP143877AB spark plugs, providing the full service volume required for 5.7-liter HEMI V8 engines. A distinctive design feature of these engines is the presence of two spark plugs per cylinder to ensure the most complete combustion of the fuel mixture and stable operation of the Multi-Displacement System (MDS). Purchasing the full set as a single package guarantees that all installed components have identical characteristics, which is critical for balanced engine operation and the prevention of idle vibrations.

Technological Excellence of Original Mopar Components

Original Mopar SP143877AB spark plugs are manufactured using an iridium-coated center electrode, which provides exceptional wear resistance under high-temperature and high-pressure conditions within 5.7L HEMI combustion chambers. The thin iridium tip allows for the generation of a more powerful spark at lower voltage, reducing the load on the ignition coils and contributing to improved vehicle acceleration dynamics. High-density ceramic insulation eliminates the possibility of electrical breakdown, ensuring reliable engine starting even in extremely low temperatures.

Operational Advantages and Resource

Using factory components allows for the maintenance of power and fuel efficiency levels established by the engineers. A special anti-corrosion coating on the housing prevents the spark plug from "seizing" to the cylinder head, significantly easing subsequent removal during routine maintenance. The side electrode design is optimized to prevent carbon buildup, ensuring a stable gap throughout the entire service life, which for these iridium plugs ranges from 120,000 to 160,000 kilometers depending on operating conditions.

Detailed Compatibility Table

The kit is designed for RAM, Jeep, Dodge, and Chrysler vehicles produced between 2012 and 2025 and equipped with the 5.7L V8 HEMI engine.

Technical Characteristics

• Brand: Mopar

• Country of Brand Registration: USA

• Material: Iridium, nickel, ceramic, steel

• Size: Thread M14x1.25, thread length 26.5 mm, hex size 16 mm

• Color: Silver metallic, white

• Weight: 720 g

• Condition: New

• Product Group: Ignition system

• Purpose: Ignition of the fuel-air mixture in 5.7L HEMI engines

• Compatibility: Chrysler, Dodge, Jeep, RAM vehicles with 5.7L V8 engines from 2012–2025

• Features: Full set of 16 units for a single replacement, iridium tip, high-pressure resistance

• Included in Kit: 16 original spark plugs in individual packaging, general shipping box

• Original Equipment Manufacturer (OEM) Number: SP143877AB

• Alternative Part Numbers: 68303913AA, MS851336

• Sealing Type: Flat crush washer

• Electrode Gap: 1.1 mm

• Heat Range: 7 (on a standard scale for high-load engines)

• Resistor Resistance: 5 kOhm

• Tightening Torque: 20–30 Nm (recommended)