NGK - 4589 IFR6T-11 Laser Iridium Spark Plug, Pack of 1

Product Review

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.

Product 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

Accessories

Permatex 22058 Dielectric Tune-up Grease - 3 oz.

Customer Reviews

Average Customer Review

(3 customer reviews)

2 of 2 people found the following review helpful

Good plugs, December 7, 2011

Amazonshoe "Amazonshoe" (texas) - See all my reviews

This review is from: NGK (4589) IFR6T-11 Laser Iridium Spark Plug, Pack of 1 (Automotive)

Denso IK20 = Electrode .4mm (rated 30k)high performance, low mileage
NGK BKR6EIX-11 = Electrode .6mm (rated 60k-70k) mid, mid
NGK IFR6T11 OE = Electrode .7mm (rated 120k) stock performance, high mileage
Denso SK20R11 (OEM long life)= Electrode .7mm (rated 120k) stock performance, high mileage

Hope this helps. These are 4 top-rated plugs. Rated mileage varies on these plugs depending on various factors of your engine. Keep your engine fuel clean and u should be fine. Toyota recommends the SK20R11 but I found in the owners manual that the discontinued "IFR6A11" is also comparable replacement, the new one is the IFR6T11.

I've tried SK20R11 and it lasted about 110k but there was some compression leak (plugs were still good though). All of these are excellent plugs. I have not tried IK20s yet but will purchase some though the 30K life is pretty short. I hate the 1mz-fe engines with the 3 rear plugs which are a *bleep* to change. Anyone have tried all...Read more

Works fine, November 7, 2011

David M. Ferreira (Alameda, now in San Francisco) - See all my reviews

Amazon Verified Purchase(What's this?)

This review is from: NGK (4589) IFR6T-11 Laser Iridium Spark Plug, Pack of 1 (Automotive)

Installed these spark plugs 20 months ago and have no problems nor issues. Works fine. I'd buy these again and the marketing side of it looks great.

0 of 6 people found the following review helpful

Too expensive for what you get, September 3, 2011

mojorising - See all my reviews

This review is from: NGK (4589) IFR6T-11 Laser Iridium Spark Plug, Pack of 1 (Automotive)

These plugs should last for 60,000 miles. For the same price I bought the brand Denso (3297) SK20R11 on Amazon that should last for 100,000 miles based on my non-racing driving style. You could go NGK Laser Iridium, but those cost much much more than Denso 3297 and I still think the Denso brand is better.

Also, for my car, Denso is oem and the same thing Toyota/Lexus uses at their shop and factory. NGK is a good brand don't get me wrong, and I have used them in the past, by why not by the better one?