4 Pack NGK 3657 Laser Iridium Spark Plugs IZFR5K11

The NGK 3657 Laser Iridium Spark Plug (IZFR5K11) is engineered for maximum durability and precision ignition in modern high-efficiency engines. Featuring a laser-welded iridium center electrode and platinum-tipped ground electrode, it offers superior longevity, consistent combustion, and optimal fuel efficiency—ideal for vehicles requiring extended service intervals.

Features & Benefits:

🔧 Iridium center electrode ensures high durability and spark strength
🔧 Platinum ground electrode extends wear life and performance
🔧 Designed for precise ignition and reduced emissions
🔧 Pre-gapped at 1.1mm for easy, OE-spec installation

Specifications:

Brand & Part Number: NGK 3657 (IZFR5K11)
Material: Iridium Center / Platinum Ground
Thread Size: 14mm
Reach: 19mm (0.75 in)
Hex Size: 5/8 in (16mm)
Heat Range: 5
Seat Type: Gasket
Resistor: Yes
Gap: 1.1mm (0.043 in)

Upgrade to NGK IZFR5K11 Laser Iridium for long-lasting ignition performance, maximum fuel efficiency, and OE-recommended quality—order now!