Are these spark plugs copper ones?

It's been a while since installation. Seems they were copper core, but don't quote me on that please ! OEM type plug for my neighbor's 2006 Jeep Liberty 3.7L. I've always had good service from NGK plugs for many years now. Hope that helps.

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6 pcs NGK V-Power Spark Plugs for 2002-2012 Jeep Liberty 3.7L V6 - Engine Kit Set Tune Up

6 pcs NGK V-Power Spark Plugs for 2002-2012 Jeep Liberty 3.7L V6 - Engine Kit Set Tune Up

Product ID: 403601573

Details

Brand
Sixity Auto
Core Material
Nickel
Thread Size
M14x1.5
Top Material Type
Ceramic Metal
Vehicle Service Type
Car

🔥V-grooved electrode for faster ignition

🔧Cold-rolled threads for damage-free install

🛡️Triple gasket seal prevents gas leakage

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$311

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Sold byAmazon BarbadosDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Ignite your Jeep’s potential with NGK V-Power – where power meets precision!

LEAK PROOF DESIGN - Five-rib insulator and triple gasket sealing virtually eliminate misfires and gas leaks.
PRECISION IGNITION - V-grooved nickel alloy center electrode delivers faster, more efficient combustion for peak performance.
UNMATCHED RELIABILITY - Cold-rolled threads and trivalent metal plating protect your engine from corrosion and seizing.
EFFORTLESS INSTALLATION - Corrosion-resistant plating ensures smooth, damage-free spark plug swaps every time.
OPTIMIZED FUEL EFFICIENCY - Solid copper core enhances heat dissipation and conductivity, boosting fuel economy and lowering emissions.

This 6-piece NGK V-Power Spark Plug set is engineered for 2002-2012 Jeep Liberty 3.7L V6 engines, featuring advanced corrosion-resistant plating, cold-rolled threads, and a unique five-rib insulator to prevent misfires. With a v-grooved nickel alloy electrode and solid copper core, these plugs deliver faster ignition, improved fuel economy, and reliable OE-quality performance trusted by racers and professionals alike.

Specifications

ASIN	B01N6UIB28
Brand	Sixity Auto
Customer Reviews	4.8 4.8 out of 5 stars (461)
Date First Available	14 January 2020
Item Dimensions LxWxH	8.4 x 2.4 x 12.6 Centimeters
Item Weight	299 g
Item model number	4024190487
Manufacturer	Sixity Auto
Manufacturer Part Number	4024190487
Net Quantity	6.0 Count
Product Dimensions	8.41 x 2.39 x 12.65 cm; 299.37 g

Reviews

J**S

27.07.2025

P**S

15.01.2025

W**N

7.10.2025

C**I

26.03.2026

M**E

20.02.2025

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