Finding and Comparing Denso Part Specifications
Part specifications serve an important aspect in choosing the correct part. The SparkPlugs.com Family of sites has multiple tools to assist you in deciphering part numbers and features.
Part Number Charts:
From any page on the site, click on the "Learning Center" link in the footer.
Click on "Charts & Tools".
Use the Heat Range Conversion Chart to compare the heat ranges between spark plug brands.
Use Denso's Numbering System to decipher Denso's alphanumeric part system.
Part Specification Listings:
All available part specifications have been included in the part details page.
Use the site search box to find the part number you wish to see the specs for. Click on the "Product Specifications" tab. Available specs may include dimensions, features, materials, longevity and warranted life.
Compare Tool:
Use the "Compare" button to select up to 4 parts within the same product type and compare their specs. Available specs may include dimensions, features, materials, longevity and warranted life.
Click the "Compare" button on all parts you'd like to compare the specs on.
Click the "Compare Now" button when you're finished selecting parts. 
Click the red "X" next to a product to remove it from the comparison, or click "Clear list" to remove all items.
Examples of how to use these tools...
#1 - What is the difference between Denso FK20HBR8 and FK20HBR11?
Using the Denso Numbering System, we see that the second set of numbers at the end of a part designates the gap setting. FK20HBR8 has a 0.8mm or .032" gap while FK20HBR11 has a 1.1mm or .044" gap.
#2 - What is the difference between Denso IK16 and IK20?
Again using our Denso numbering system, we find that this first number designates the heat range. We also see that a Denso 16 is hotter than a Denso 20.
#3 - Let's take a non spark plug example. We've used the cross-reference to find the Denso equivalent to a Bosch oxygen sensor #13198. The results give us two Denso equivalents, 234-4072 and 234-4151
Looking at the pictures, the two Denso sensors appear identical. By using the "Compare" tool and viewing the specs, we find that 234-4072 features a 394mm or 15.5" lead wire, while 234-4151 features a 318mm or 12.5" lead wire. Knowing the needed distance between our sensor and plug will help us determine if the 12.5" or 15.5" lead wire would be a better fit.
