2017 highlander v6 manual says i need (denso 3491) 0.031 gap, but amazon & rock auto says this denso 4705, 0.040 gap fits?

I can't honestly answer your question. I bought for a 2006 Lexis IS350. I've had no issues.

Are these legit products?

Yes, very good original equipment plug in the Tacoma. Had mine in for over 45K now. No problems.

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DENSO Iridium TT Spark Plug - IKBH20TT - Twin Tip - The Powerful Premium Quality Ultra-Efficient Replacement Plug Fits Lexus ES GS IS C LS RX RC LC, Toyota Crown Camry Mark X

DENSO Iridium TT Spark Plug - IKBH20TT - Twin Tip - The Powerful Premium Quality Ultra-Efficient Replacement Plug Fits Lexus ES GS IS C LS RX RC LC, Toyota Crown Camry Mark X

Product ID: 92389816

Details

Brand
Denso
Core material
Iridium
Thread size
26.5
Top material type
Iridium
Vehicle service type
Car Van

⚡φ0.4mm Iridium center electrode

🔥Twin Tip design for max flame kernel

🔧22 Nm tightening torque

€ 32.79

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Description

⚡ Ignite your drive with precision and power!

TWIN TIP TECHNOLOGY - Double needle electrode accelerates flame development for peak engine performance.
EMI NOISE ELIMINATOR - Built-in monolithic resistor blocks electromagnetic interference for smooth electronics.
FUEL EFFICIENCY BOOSTER - Optimized electrode design improves fuel economy and reduces quenching effect.
PRECISION IGNITION POWER - Ultra-fine iridium tip reduces spark voltage for lightning-fast ignitability.
DURABILITY MEETS RELIABILITY - All-around laser welding ensures spark plug integrity under extreme conditions.

The DENSO Iridium TT Spark Plug (IKBH20TT) features a cutting-edge twin tip design with a 0.4mm iridium center electrode and 0.7mm platinum ground electrode, delivering superior ignition, improved acceleration, and enhanced fuel efficiency. Engineered with all-around laser welding and a built-in resistor, it guarantees durability and electromagnetic noise reduction, making it the premium replacement spark plug for Lexus and Toyota models.

Specifications

Asin	B00TPU9BWO
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	315,539 in Automotive (See Top 100 in Automotive) 1,340 in Car Spark Plugs
Brand Name	Denso
Compatible With Vehicle Type	Car, Van
Core Material	Iridium
Country Of Origin	Japan
Customer Reviews	4.7 4.7 out of 5 stars (225) 4.7 out of 5 stars
Gap Size	1 Millimeters
Global Trade Identification Number	00042511047051
Included Components	Iridium TT Spark Plug x1
Item Type Name	Spark Plug
Item Weight	52 Grams
Manufacturer	Tetrosyl Express Limited
Manufacturer Part Number	IKBH20TT
Manufacturer Warranty Description	2 Year Manufacturer
Model Number	IKBH20TT
Number Of Items	1
Oem Equivalent Part Number	90919-01249-79-LEXUS,90919-01249-LEXUS,90919-01249-TOYOTA,90919-01255-A-TOYOTA,90919-01255-TOYOTA,90919-01263-79-LEXUS,90919-01263-LEXUS,90919-01263-TOYOTA,90919-01279-79-LEXUS,90919-01279-LEXUS,90919-01279-TOYOTA,90919-01288-TOYOTA
Thread Size	26.5 millimetri
Top Material Type	Iridium
Unit Count	1.0 count
Upc	042511047051

Reviews

User

Original. Great buy.

Great buy. Original

16.02.2026

User

BEST SPARK PLUGS HANDS DOWN!!!

Bought these spark plugs for my 2008 Lexus IS 250 and my engine feels like a dream. Car runs great!

30.07.2026

User

3rd gen Tacoma plugs

Great spark plugs direct fit for my 3rd gen Tacoma

8.07.2026

User

Oem for sure!

Legit item, works as it should.

13.04.2026

User

Better than Bosch.

Definitely worth it to buy, my husband bought boshe I think its called but the lower end of boshe and it kept causing our truck to missfire. Both brand new, but Denso did its job. No more deceleration on the RPM when its idling.

6.03.2026

User

Great Spark Plugs!

Immediately noticed a performance increase after installing these plugs in my 3rd Gen Tacoma. Not disappointed!

9.02.2026

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€ 32.79

Duties & taxes included

In stock

Sold byAmazon PortugalDelivered 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 Portugal.

Secure transaction

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Fast, free shipping, member pricing & priority support.

Join PRO →

Trustpilot

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