What is the heat range rating on this plug?

Here is a comparable heat range chart: https://www.densoproducts.com/learning-center/article/225/heat-range-conversion-chart, obviously this is a 20 plug.

Are these denso (4709) iw20tt spark-plugs delivered "pre-gapped" to the customer?

As in any spark plug (SP) user, you should always check the gap. The same SP could be used in different engines and/or applications. So, BE EXTRA CAREFUL GAPPING these SP because the center electrode is .040 in dia. Will snap off very easily. I put them in a vice with vg light and carefully gap to what I need. I use non-nickel anti-seize on the threads whether the heads are aluminum or CI. Torque to factory specs. Good luck

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

DENSO Iridium TT Spark Plug - IW20TT - Twin Tip - The Powerful Premium Quality Ultra-Efficient Replacement Plug Fits Fiat Mercedes-Benz Honda MG Nissan Porsche Renault Subaru VW Hyundai Daewoo Lotus

DENSO Iridium TT Spark Plug - IW20TT - Twin Tip - The Powerful Premium Quality Ultra-Efficient Replacement Plug Fits Fiat Mercedes-Benz Honda MG Nissan Porsche Renault Subaru VW Hyundai Daewoo Lotus

Product ID: 58843717

Details

Brand
Denso
Core material
Iridium
Thread size
14 millimeters
Top material type
iridium
Vehicle service type
Car Van

⚡φ0.4mm Iridium center electrode

🔥Twin Tip design for max power

🔩14mm diameter, 19mm thread length

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

€ 25.47

Duties & taxes included

In stock

Sold byAmazon IrelandDelivered 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 Ireland.

Secure transaction

ProDesertcart PRO

Fast, free shipping, member pricing & priority support.

Join PRO →

Description

⚡ Ignite Performance, Drive with Confidence!

TWIN TIP TECHNOLOGY - Double needle electrode accelerates flame kernel for peak engine power and efficiency.
LASER WELDED DURABILITY - All-around laser welding ensures unmatched reliability under extreme driving conditions.
WIDE VEHICLE COMPATIBILITY - Fits premium brands like Mercedes, Porsche, Honda, VW, and more—upgrade your ride effortlessly.
ELECTROMAGNETIC NOISE SUPPRESSION - Built-in resistor eliminates interference, protecting your vehicle’s electronics.
PRECISION IRIDIUM CENTER ELECTRODE - Ultra-fine 0.4mm tip reduces spark voltage for lightning-fast ignition.

The DENSO Iridium TT IW20TT spark plug features a precision 0.4mm iridium center electrode and a twin tip design that maximizes ignition efficiency and engine power. Engineered with laser welding for durability and a built-in resistor to prevent electromagnetic interference, it fits a wide range of premium vehicles including Mercedes-Benz, Porsche, Honda, and VW. This premium spark plug delivers improved acceleration, fuel economy, and longevity, making it the ultimate upgrade for discerning drivers.

Specifications

ASIN	B00TPUA6I2
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	355,233 in Automotive ( See Top 100 in Automotive ) 1,452 in Car Spark Plugs
Brand	Denso
Brand Name	Denso
Compatible with Vehicle Type	Car, Van
Core Material	Iridium
Core material	Iridium
Country Of Origin	Japan
Customer Reviews	5.0 out of 5 stars 11 Reviews
EU Spare Part Availability Duration	1 Years
Global Trade Identification Number	00042511047099
Included Components	Iridium TT Spark Plug x1
Item Type Name	Spark Plug
Item Weight	0.12 Pounds
Manufacturer	Tetrosyl Express Limited
Manufacturer Part Number	IW20TT
Manufacturer Warranty Description	2 Year Manufacturer
Model Number	IW20TT
OEM Equivalent Part Number	0948200154, 101000002AE, 101000047AB, 1UD118110, 1UT118110
Thread Size	14 millimeters
Thread size	14 millimeters
Top Material Type	iridium
Top material type	iridium
UPC	042511047099
Unit Count	1.0 count
Vehicle service type	Car, Van

Reviews

D**R

Genuine Denso

Great spark plug, I checked these carefully on receipt to make sure they where genuine (as there are a lot of fakes about).

25.07.2025

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.