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DENSO 3421 Iridium Long-Life Spark Plug

(Honda Civic 2006, 2009-11, Insight 2000-06; Toyota Tundra 2005-17, Tacoma 2005-15, 4Runner 2003-13, FJ Cruiser 2007-13, Sequoia 2008-17 + 61 more models)

Part of: DENSO Iridium Long Life Spark Plug

Other options in this family: DENSO 3534 DENSO FK16HQR11#4 DENSO SK20R-P11 DENSO 3494 DENSO 3518

Manufacturer

Picture for manufacturer DENSO

Part Number

3421
10 reviews
Sale Price

$9.43

In Stock (10+)

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

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Fitment guaranteed

Fitment guaranteed

Product Details

The DENSO 3421 Iridium Long-Life spark plug delivers exceptional ignition performance and extended service life for demanding automotive applications. Engineered to meet the strictest OE performance standards, this premium spark plug features an iridium center electrode that provides superior durability and consistent spark energy throughout its extended service interval.

Key Features:

  • Iridium center electrode for enhanced durability and longevity
  • Manufactured to OE specifications for performance, durability, and emissions compliance
  • Extended service life reduces maintenance frequency and costs
  • Consistent spark energy ensures reliable ignition and smooth engine operation
  • Precision-engineered for optimal combustion efficiency

DENSO's advanced iridium technology provides a stable spark and reliable performance under extreme operating conditions, making this spark plug an excellent choice for maintaining your vehicle's performance and fuel efficiency.

Products specifications

Fits

Honda Civic 2006, 2009-11, Insight 2000-06; Toyota Tundra 2005-17, Tacoma 2005-15, 4Runner 2003-13, FJ Cruiser 2007-13, Sequoia 2008-17, Land Cruiser 2008-11, 2013-17; Chevrolet Camaro 1993-2002, HHR 2006-11; Acura TL 2004-08 + 57 more models

Manufacturer Heat Range

20

Pre-Gap Size

1.1

Ground Electrode Core Material

Nickel

Seat Type

FLAT

Ground Electrode Quantity

1

Center Electrode Tip Material

Iridium

Ground Configuration

Standard

Center Electrode Core Material

Copper

Thread Diameter

14.00

Resistance

5000

Reach

26.50

Ground Electrode Tip Design

Platinum Chip

Hex Size

16.0

Great prices, good quantity on hand, easy to use website and check out.

Fast and easy, found answer to design problem on 3.5 eco boost

Best price, easy order process.

Nice and fast, clear and easy to read if this is the part I want, and if it will fit my car or NOT.

Ordering was easy and delivery a lot sooner than expected.I will be a returning customer.

Excellent

First off, I LOVE my new shipments! These guys had everything at super low prices, and the shipping was phenomenally fast. It's all working great, and imm definitely buying from these guys again.

Ordered a sling to store my roof rack. There was an issue with the supplier which was quickly resolved by the Autoplicity staff. Great customer service -- most responsive I've ever seen.<br><br>Best prices around.

hopefully receive by weekend

Cheap prices, great quality, and fast delivery. Autoplicity will continue to receive my patronage.

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