Would these work good in a supercharged 04 mustang ?

No. You need a smaller gap like .032 - .035 depending how much boost you got. These are gapped at .059 which would take too much bending to gap it down. NGK says not to change gap more than .008. NGK TR6ix would work better with preset gap at .039

The NGK TR55IX plugs do not fit a 2002 Tahoe, 5.3l flexfuel. Must use the TR5IX. Too many places including parts stores are selling the wrong plug.

I don’t know why you think the TR55IX won’t work, just a slightly cooler plug than the TR5IX. In a lot of climates, it would probably help more than hurt.

What is the gap preset on this plug?

Hi, Set of 8 TR55IX NGK Iridium IX plugs Gap: 1.5mm Heat: "5" Seat: taper NOTE: these are very similar to TR5IX, the difference is: TR5IX have 1.0mm gap and TR55IX have 1.5mm gap. They are the same heat rating, length, etc. NOT SUITABLE FOR Ford TS50 with alloy heads. Hope this info will help you make a decision.

Are these "one piece" spark plugs unlike the three piece design that comes as oem 2005 f150 4.6l?

I installed these plugs in a 2002 Mercury Mountaineer 4.6 liter and they were one piece....easy to install ...make sure you use anti seize compound on the threads...and gap them properly to specs...the motorcraft plugs are prone for breaking off inside the vehicles because they get too hot and become brittle after awhile...and most people dont change them every 40-50,000 miles...definetely recommend the NGK's

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

NGK 7164 Iridium IX Spark Plugs TR55IX (8 Pack)

NGK 7164 Iridium IX Spark Plugs TR55IX (8 Pack)

Product ID: 12620812

Details

Brand
NGK
Core Material
Iridium
Thread Size
14mm
Top Material Type
Iridium
Vehicle Service Type
Car Truck

⏳Long-lasting durability for extended use

⚡Iridium core for max spark efficiency

🔧OEM-grade fit for perfect compatibility

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

VT25160

Duties & taxes included

In stock

Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vanuatu.

Secure transaction

Details

Brand
NGK
Core Material
Iridium
Thread Size
14mm

Description

⚡ Ignite your drive with NGK Iridium IX – where power meets precision!

ENHANCED LONGEVITY - Built to last longer than standard plugs, reducing maintenance frequency and saving you time and money.
OEM GRADE RELIABILITY - Trusted by manufacturers worldwide, ensuring seamless fit and consistent operation for your vehicle.
PRECISION IRIDIUM CORE - Experience superior ignition with ultra-fine iridium tips that boost engine performance and fuel efficiency.
INSTANT PERFORMANCE BOOST - Say goodbye to misfires and enjoy smoother acceleration from the moment you install these plugs.
COMPLETE 8 PACK CONVENIENCE - Get a full set for your vehicle’s engine, ensuring uniform performance and hassle-free replacement.

NGK 7164 Iridium IX Spark Plugs deliver OEM-level quality with a precision iridium core that enhances ignition efficiency and engine performance. Designed for vehicle-specific fitment, these plugs offer exceptional durability and reliability, backed by NGK’s reputation as the world’s largest OEM spark plug supplier. Sold in an 8-pack, they provide a complete solution for smooth, long-lasting engine operation.

Specifications

ASIN	B0033I4W6E
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	#49,224 in Automotive ( See Top 100 in Automotive ) #359 in Automotive Replacement Spark Plugs
Brand	NGK
Brand Name	NGK
Compatible with Vehicle Type	Car, Truck
Core Material	Iridium
Customer Reviews	4.8 out of 5 stars 684 Reviews
Included Components	7164
Item Weight	11.52 ounces
Manufacturer	NGK
Manufacturer Part Number	7164 TR55IX
Manufacturer Warranty Description	Includes manufacturer provided warranty
Model Number	7164
Number of Items	8
OEM Equivalent Part Number	FORD%1315691
Thread Size	14mm
Top Material Type	Iridium
UPC	087295071649
Unit Count	1.0 Count
Vehicle Service Type	Car, Truck

Reviews

B**R

7.01.2026

A**A

6.09.2025

J**G

29.07.2025

M**S

10.10.2025

J**.

3.03.2026

G**Y

9.03.2026

A**S

3.11.2023

J**H

23.10.2025

A**E

22.09.2023

M**E

26.09.2023

M**I

24.01.2024

F**K

20.10.2025

A**R

14.09.2018

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.