Denso Iridium Spark Plugs 6-Pack SK16HR11 (3417) — Long Life, Direct-Fit OEM Replacement

DENSO 3417 (SK16HR11) iridium spark plugs are a six-piece OEM-grade replacement set engineered for longer service life and consistent ignition performance.

These genuine DENSO 3417 spark plugs come in a convenient 6-pack, designed as direct-fit replacements for compatible gasoline engines that call for the SK16HR11 specification. Built with an iridium center electrode and precision-ground tip, they prioritize reliable starts, steady combustion, and extended service intervals compared with standard copper plugs. This listing is for one order containing six new DENSO 3417 spark plugs — ideal for multi-cylinder tune-ups or stocking a maintenance kit.

Which engines and vehicles work with DENSO 3417 (SK16HR11)?

The DENSO 3417 follows the SK16HR11 thread, heat range, and electrode design—check your owner’s manual or existing plug for match. These plugs are commonly used in a variety of passenger cars and light trucks that specify SK16HR11-style iridium plugs.

• Fits engines requiring SK16HR11 dimensions and thread pitch
• Suitable for many gasoline-powered vehicles and OEM applications
• Direct replacement when your vehicle manufacturer lists DENSO 3417 or SK16HR11

How do iridium electrodes benefit performance and longevity?

Iridium is a hard, high-melting-point metal that allows a smaller, precise electrode tip. Compared with conventional materials, iridium maintains a finer spark gap longer, which supports stable combustion over many miles.

• Smaller electrode for more concentrated spark and improved ignition
• Greater erosion resistance extends useful service life
• Helps maintain factory-specified gap for consistent fuel burn

What should I expect during installation and maintenance?

Installation follows standard spark plug replacement steps: remove old plugs, confirm correct gap if needed, and torque to the manufacturer’s specification. Use anti-seize only if recommended by your service manual and inspect coil boots and ignition components while you’re working.

• Inspect threads and seat surface for debris before fitting
• Tighten to vehicle-specified torque to avoid damage or leakage
• Check ignition coils and wires for wear when replacing plugs

How many plugs are included and when should I replace them?

This listing supplies six new DENSO 3417 spark plugs—one order equals a full 6-piece set. Replacement intervals vary by driving habits and engine design; consult your vehicle manual, but iridium plugs typically last noticeably longer than conventional plugs.

• One order = 6 genuine DENSO 3417 (SK16HR11) spark plugs
• Replace according to vehicle manufacturer or performance symptoms
• Longer service life than copper plugs, reduce frequency of changes

Who is this for: This six-pack of DENSO 3417 (SK16HR11) iridium spark plugs is aimed at DIY mechanics, professional technicians, and vehicle owners performing scheduled maintenance on compatible gasoline engines. If you need OEM-quality replacements that deliver reliable ignition, extended plug life, and clean combustion characteristics for a multi-cylinder engine, this set is an appropriate choice. Confirm compatibility with your vehicle’s specifications before purchasing.