They are supposedly pregapped, but all my plugs that came had a gap of 0.035. My truck calls for a gap of 0.044. I had to use my gapping tool to adjust the gap of each.

does this fit 2007 rx400h?

According to the information provided, you need Denso 4504. https://www.amazon.com/dp/B00S3H2D3Y?ref=myi_title_dp

Compatible with Honda Odyssey 1998 4 cyl?

Cannot say, my application was a 2003 Odyssey and all went well

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6 PCSNEW -- DENSO #4503 PLATINUM T T Spark Plugs -- PK16TT

Product ID: 11350485

Details

Brand
Denso
Core Material
Platinum
Thread Size
Thread Pitch:
Top Material Type
Platinum
Vehicle Service Type
Car Truck

⚡Twin-Tip Platinum Electrodes 1.1mm

🔩360° Laser Welding for Durability

⛓️Titanium-Enhanced Alloy Ground Electrode

R1319

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Ignite Performance, Drive with Confidence!

VEHICLE SPECIFIC FIT - Perfectly engineered for cars and trucks, guaranteeing hassle-free installation and optimal compatibility.
PRECISION TWIN TIP DESIGN - Maximizes spark efficiency for smoother ignition and improved fuel economy.
360 LASER WELDED STRENGTH - Ensures unmatched electrode durability and longevity under extreme conditions.
TRUSTED BRAND WITH PROVEN QUALITY - DENSO’s platinum spark plugs boast a 4.6-star rating from over 4,200 users—join the elite drivers upgrading their ride.
TITANIUM ENHANCED GROUND ELECTRODE - Minimizes tip erosion, extending spark plug life and performance consistency.

The DENSO #4503 Platinum Twin-Tip Spark Plugs feature a unique 1.1mm platinum center electrode and titanium-enhanced ground electrode, welded with 360° laser precision for superior durability. Designed for vehicle-specific fitment, these spark plugs deliver reliable ignition, improved fuel efficiency, and extended lifespan, backed by a strong customer rating and manufacturer warranty.

Specifications

ASIN	B00S3GUW1U
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	#92,880 in Automotive ( See Top 100 in Automotive ) #579 in Automotive Replacement Spark Plugs
Brand Name	Denso
Compatible with Vehicle Type	Car, Truck
Core Material	Platinum
Customer Reviews	4.6 4.6 out of 5 stars (4,211)
Gap Size	0.04 inches
Included Components	4503
Item Highlight	Replaces 5962H8 5962J1 5613796 5614106 5614285 5614286 9195166 AGSP32C AGSP32F AJ84575 C2A1535 12582002 1822A030 1822A068.
Item Weight	1.44 ounces
Manufacturer	Denso Sales California, Inc.
Manufacturer Part Number	4503
Manufacturer Warranty Description	Includes manufacturer provided warranty
Model Number	PK16TT
Number of Items	1
OEM Equivalent Part Number	4503
Thread Size	Thread Pitch: 1.25mm, Hex Size: 16mm
Top Material Type	Platinum
UPC	026521134574
Unit Count	1 Count

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