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Description
NGK Iridium IX Spark Plugs (8) for 1999-2016 E350 Econoline Super Duty 5.4 Gasoline | 1.5 Step ColderNGK TR7IX 8P E35S9916 54 Qty: 8 plugs Fine Iridium tip ensures high durability and a consistently stable spark Iridium alloy has extremely high melting point, perfect for todays high tech, high performance engines Trivalent Metal Plating superior anti corrosion and anti seizing properties Outstanding acceleration, high fuel efficiency and durability Ultimate design, technology and performance.
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Best in 7 days
4.5 ★★★★★
Based on 2237 reviews
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Product Reviews
★★★★★ 5
Great replacement kit
Called around for quotes to get them replaced and everyone was quoting over $2k just for bellows. Figured I’d give it a try. The rubber is good quality and feels soft. Time will tell but this is an easy job if you’re mechanically inclined. Make sure you replace the plastic water pickup fitting while you’re at it. Found mine to be cracked on disassembly and had to wait for a new one. Should be a easy 3-4 hour job if your not doing the bearing and only doing bellows
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Reviewed in the United States on August 26, 2024
★★★★★ 3
Just ok
Qualities OK, but for Marine applications might want better
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Reviewed in the United States on August 3, 2025
★★★★★ 5
Great quality
Just as described.
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Reviewed in the United States on July 22, 2025
★★★★★ 5
Bellows kit review initial inspection’s
Very good quality. The hose clamps were event the better ones you have to pay extra in most cases.
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Reviewed in the United States on April 6, 2025
★★★★★ 5
Durable and well fitting
Durable and well fitting. I drive a Honda Accord 2014 and when the under engine covers started falling off I used these to replace the ones that came off. They work well and the prying tool made replacing the retainers easier.
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Reviewed in the United States on January 18, 2026
