20 Best Spark Plugs For 4.0 Jeep Cherokee (2023 Updated)

With its high melting point iridium alloy is perfect for modern high-tech high-performance engines. The NGK iridium IX Spark Plug will give you stellar acceleration increase fuel efficiency and durability.

This spark plug features Trivalent Metal Plating which has corrosion resistant and anti seizing properties. The first-rate 0. 6mm laser welded iridium tip will give you a consistently stable spark. This NGK CR8EIX Iridium IX Spark Plug also features a tapered ground electrode that will minimize the “Quenching Effect”.

Features You can depend on NGK for quality and reliability Constructed from durable material Fine Iridium tip ensures high durability Features superior anti-corrosion and anti-seizing properties Iridium alloy has extremely high melting point, perfect for today’s high-tech, high-performance engines NGK Iridium IX Spark Plug is designed to offer extreme ignitability, improved throttle response and superior anti fouling capacity.

It is constructed from durable material that is corrosion and abrasion resistant. This Spark plug features a fine iridium tip that ensures high durability. It ensures longevity and can easily be installed.

The Autolite APP985 Double Platinum Spark Plug features platinum-to-platinum firing. Virtually eliminates gap erosion, reduces misfires, and provides improved durability. It’s the superior-performing spark plug providing preferred technology for DIS engines.

Guaranteed for five years. Autolite makes plugs for American, Japanese, European, and Korean cars as well as plugs for Lawn & Garden and Power Sports. As a leading supplier of spark plugs, the Autolite brand has the right ignition products for your application, regardless of make or model, import or domestic.

NGKs Laser Iridium Spark Plugs provide superior ignitability and long service life. Fine wire iridium tipped center electrode and fine wire platinum tipped ground electrode ensure slow wear rate for stable idle, superior anti-fouling, improved fuel efficiency, and lower emissions.

Tivalent metal plating provides superior anti-corrosion and anti-seizing properties. Corrugated ribs prevent flash-over. Pure alumina silicate ceramic insulator provides strength and better heat transfer, while copper core aids in heat removal.

Triple seals prevent leakage. Iridium center electrode and platinum ground electrode. 14mm thread size. 1. 25mm thread pitch.

Iridium Spark Plug; Bosch Iridium Spark Plugs are engineered to deliver both high performance and long life, representing the best of OE spark plug technology. The ultra-fine wire iridium center electrode firing pin delivers best performance.

Unlock the performance in your engine with Bosch Iridium Spark Plugs.

Bosch OE Fine Wire Platinum Spark Plugs deliver improved ignitability and fuel efficiency. The fine wire design with a platinum firing pin on the center electrode and tapered ground electrode are an economical upgrade from conventional copper core spark plugs.

Engineered to meet or exceed Original Equipment specifications for platinum spark plugs.

Ngk iridium ix spark plug is designed to offer extreme ignitability, improved throttle response and superior anti fouling capacity. It is constructed from durable material that is corrosion and abrasion resistant.

This spark plug features a fine iridium tip that ensures high durability. It ensures longevity and can easily be installed.

NGK Spark Plugs (U. S. A. ), Inc. is the largest OE supplier and manufacturer of spark plugs for domestic and import vehicles in North America. Its OE legacy, unsurpassed quality and leading vehicles in operation coverage reinforces NGK as The Ignition Specialist.

With over 80 years of automotive expertise NGK has built a reputation for quality and reliability; manufacturing spark plugs for virtually every automotive, motorcycle, marine and small engine application.

– ITEM DESCRIPTION:Shell – Thread Diameter: 12mm – Thread Pitch: 1. 25mm – Seat Type: Gasket – Reach: 26. 5mm (1. 04″)Hex Size: 5/8″ (16mm)Terminal Type: Solid – Overall Height: ISOGap:043″ (1. 1mm)Center Electrode – Material: Iridium – Type: Fine Wire – Size: 0.

6mm – Projection: Extended Projection – Ground Electrode – Material: Platinum – Type: Square – Shape: Taper Cut – Quantity: 1Specifications – Resistor: Yes – Resistor Value: 5k Ohm – Heat Range: 7Torque Specs: Cast Iron: 10.

8-18 lb. ft. Aluminum: 10. 8-14. 5 lb. ft.

Introducing the ultimate evolution in spark plug technology and performance. Superior to Platinum, NGK Iridium spark plugs benefit from their unique patented design which features: A Super Fine Centre electrode (0.

6mm), reducing voltage requirements, minimizing flame quenching and allowing for a stronger spark. New Iridium material with superior anti-oxidation, anti-corrosion and extremely high melting point characteristics.

Unique 2 stepped centre electrode – a secondary micro discharge burns off carbon deposits as they form. Minimized gap growth between electrodes, giving longer life. Tapered Cut Ground Electrode ensures an excellent flame spread and improved vibration resistance.

It is the combination of these designs in NGK’s Iridium spark plugs that allows your engine to run more efficiently, producing cleaner exhaust emissions and more power though better ignitability.

The secret of the new Iridium IX spark plug is the laser welded electrode made of iridium. Through its “minimal” diameter of only 0. 6 mm it bundles ignition voltage. The Advantages of Iridium IX spark plug at a glance The optimum ignition characteristics of Iridium IX spark plugs prevent sooting in stop and go traffic.

Misfire or misfiring can be prevented. This reduces emissions and conserves (if any) the catalyst and the environment. The Iridium IX spark plugs ensure “round” engine running, increase the driving experience through better acceleration and thus offer greater driving pleasure.

The Iridium IX spark plug keeps at least twice as long as any normal spark plug. Frequent change of spark plugs are so “out”. This in turn reduces the cost. Highest ignition reliability, uniform combustion, optimum engine performance, throttle response are the result of modern technology and reduce fuel consumption.

The optimized electrode shape reduces the ignition voltage, protects the engine and assures a “round” run.

Iridium IX Spark Plug. The ultimate in the evolution of spark plug technology and performance from the industry leader. The iridium electrode is 25% smaller than a platinum electrode, and it ́s just 1/4 the size of a conventional nickel electrode.

Ultra-small diameter center electrode reduces voltage requirement and extends ignition system life. New metal shell plating has enhanced anti-corrosion qualities.

NGK Iridium IX Spark PlugNGK Iridium IX spark plugs are designed specifically for the performance enthusiast. Iridium IX spark plugs offer extreme ignitibility, improved throttle response and superior anti-fouling.

The fine-wire iridium center electrode ensures high durability and a consistently stable spark. A special taper-cut ground electrode shape allows more area for faster flame expansion. Iridium alloy has an extremely high melting point, perfect for today’s high-performance engines.

Trivalent metal plating provides superior anti-corrosion and anti-seizing properties.

Champion Iridium – the ultimate element. This spark plug’s fine-wire iridium center and platinum ground electrodes provide the sharpest spark focus for maximum performance. Champion Iridium – the ultimate element.

This spark plug’s fine-wire iridium center and platinum ground electrodes provide the sharpest spark focus for maximum performance.

Iridium IX Spark Plugs are the most technologically advanced high performance plugs available. Featuring a 0. 6 mm iridium center electrode tip, they offer superior ignitability without sacrificing durability.

The tapered ground electrode increases flame kernel expansion, while the superior heat range design is ideally suited to the demands of high performance environments. Specially designed to meet the needs of serious enthusiasts, Iridium IX Spark Plugs offer outstanding acceleration, high fuel efficiency and long life.

When you demand the most from your engine, rely on the proven performance of NGK Iridium IX Spark Plugs. NGK’s new Iridium IX is the personification of these qualities and takes premium performance spark plugs to a new level.

A level that is expected from the world leader in spark plugs.

The FR78X Bosch Super 4 Spark Plug x4 operates on the state-of-the-art air-cushion-spark principle and is the first spark plug to feature four thin ground electrodes with one pointed, silver-plated center electrode.

This combination is unique in the world and has decisive benefits. The ignition spark always chooses the best path for reliable ignition according to the engine load. The Bosch Super 4 does more than a conventional spark plug.

In all situations, throughout its service life.

The secret of the new Iridium IX spark plug is the laser welded electrode made of iridium. Through its “minimal” diameter of only 0. 6 mm it bundles ignition voltage. The Advantages of Iridium IX spark plug at a glance The optimum ignition characteristics of Iridium IX spark plugs prevent sooting in stop and go traffic.

Misfire or misfiring can be prevented. This reduces emissions and conserves (if any) the catalyst and the environment. The Iridium IX spark plugs ensure “round” engine running, increase the driving experience through better acceleration and thus offer greater driving pleasure.

The Iridium IX spark plug keeps at least twice as long as any normal spark plug. Frequent change of spark plugs are so “out”. This in turn reduces the cost. Highest ignition reliability, uniform combustion, optimum engine performance, throttle response are the result of modern technology and reduce fuel consumption.

The optimized electrode shape reduces the ignition voltage, protects the engine and assures a “round” run.

Champion pioneered the use of iridium in industrial applications nearly 30 years ago. Now iridium is quickly becoming the technology of choice for engine manufacturers worldwide.

Laser Iridium Compared to Standard Spark plugs, NGK Laser Iridium provides a superior fuel burn combined with a longer service life. With 6. 5 on the ‘Mohs’ hardness scale, Iridium is the second-densest element to exist (after Osmium), yet it’s also the most corrosion-resistant metal (even at temperatures as high as 2000? C ).

Thanks to Iridium’s excellent electrical conductivity properties, it’s the perfect metal element to include in the manufacture of premium spark plugs. The laser welded platinum disc on the ground electrode provides extra durability, once again improving service life and bringing the wear rate down to a minimum.

With both electrodes working in harmony together, your engine will have a more stable idle with superior anti-fouling, improved fuel efficiency and lower emissions. Another great feature is that the ground electrode is also taper cut, in simple terms, this is done to reduce as much obstruction as possible to the flame expansion (this reduces quenching) as it starts to burn from the electrode tips.

This allows for a more complete, efficient burn which in turn increases MPG. Features Laser welded Iridium centre electrode tip Laser welded Platinum disc on the ground electrode Trivalent metal plating for superior anti-corrosion and anti-seizing properties Faster starts and smoother acceleration Superior anti-fouling Lower required spark voltage, great for those colder mornings Tapered ground electrode improves flame expansion from the initial spark Better fuel economy and lower emissions Factory fitted equipment in many of today’s vehicles (OEM Approved Design) Outstanding quality as you come to expect from NGK.

Proven track record and used in millions of vehicles around the world.

Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling. The 0. 6mm laser welded fine iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect.

Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage. Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today’s high-performance engines.

Trivalent metal plating has superior anti-corrosion and anti-seizing properties.

Reach, 5/8 in. Hex, Gasket Seat, Resistor, Each – NGK Iridium IX spark plugs feature an ultra-fine center electrode that’s designed just thick enough to ensure the maximum durability and life of the spark plugs and just thin enough to create an accurate and consistent spark.

They represent the ultimate evolution of spark plug technology and performance. Iridium is the hardest metal used in spark plugs today six times harder than platinum. This allowed NGK engineers to reduce the voltage requirement for a spark.

Iridium IX plugs are available in more than a hundred configurations for universal and vehicle-specific applications.