Denso 3517 Spark Plug

Buyer fitment guide only intended as reference. Please use catalogue search by vehicle to ensure proper fitment.

• DENSO Auto Parts FC16HR-CY9
• Toyota 9091901281
• Toyota 9091901298
• DENSO Auto Parts FC16HR-CY9#4
• NAPA Mileage Plus 3517

• Platinum center electrode
• Platinum ground electrode
• Premium shell construction with machine-rolled threads
• Reduced secondary required voltage, increased ignition efficiency
• Superior thermal conductivity
• Sustained spark performance over 60,000 miles
• DENSO is the pioneer in introducing platinum spark plugs to the automotive aftermarket, but has hardly been content to rest on that achievement. Conventional platinum plugs use platinum for only the center electrode, while the DENSO Double Platinum plug features platinum on both the center and ground electrodes. This precious metal fights corrosion and erosion, ensuring superior spark performance and maximum spark plug life capable of extended operation in excess of 60,000 miles.