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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⚡ Ignite your drive with DENSO’s cutting-edge twin tip spark plug!

TWIN TIP TECHNOLOGY - Double needle electrode reduces quenching, boosting acceleration and fuel economy
PERFECT FIT TORQUE - Designed for Lexus & Toyota models with optimal 22 Nm tightening torque for secure installation
LASER WELDED DURABILITY - All-around laser welding ensures unmatched reliability under extreme conditions
PRECISION IGNITION POWER - Ultra-fine 0.4 mm iridium tip for superior spark efficiency
ELECTROMAGNETIC NOISE SHIELD - Built-in monolithic resistor eliminates interference for smooth engine performance

The DENSO Iridium TT Spark Plug (IKBH20TT) features a precision 0.4 mm iridium center electrode and a twin tip double needle platinum ground electrode, engineered to maximize ignition efficiency, acceleration, and fuel economy. Its laser-welded construction guarantees durability under harsh conditions, while the embedded resistor prevents electromagnetic interference. Designed specifically for Lexus and Toyota models, it ensures a perfect fit with a 22 Nm tightening torque.

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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.

499 DH

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Moroccostore

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Manufacturer	DENSO Corporation
Brand	Denso
Model	IKBH20TT
Product Dimensions	9.3 x 2.5 x 2.5 cm; 45.36 g
Item model number	IKBH20TT
Manufacturer part number	4705
OEM Part Number	DENS7
Position	Front, Rear
Item Weight	45.4 g

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

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