r the lugs pre-gapped

Yeah, mine were. But I adjusted the gap to the spec. Plus with shipping you never know if the gap gets changed or not. Get yourself a sparkplug gap tool.

Can a AP 104 misfire in two weeks?

I suppose it is possible, if it is defective, but a normal plug should last for years. I recently installed APP 104's in a Taurus Duratec DOHV, and the car developed a mis-fire on Cylinder 3 within a couple of weeks. Then, a few days later, it developed a mis-fire on cylinder one. As it turned out, the problem was not the plugs, but the COP coils. I'm not sure why they both decided to die within a short period of time after I replaced the plugs, unless jostling the COP's in removal and installation somehow damaged the internal electronics. The car was 14years old and had over 200,000 miles at the time.

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⚡ Ignite your drive with unstoppable power and precision!

LIGHTNING FAST IGNITION - Necked-down center electrode fires quicker with less voltage for effortless starts and rapid acceleration.
PRECISION GAP STABILITY - High nickel alloy side electrode maintains exact gap, delivering consistent spark and extended lifespan.
HEAT OPTIMIZED DURABILITY - Yttrium-enhanced ground electrode maximizes heat transfer to keep your engine running cooler and stronger.
TRUSTED LEGACY PERFORMANCE - Backed by Autolite’s 80+ years of expertise, these plugs are the reliable choice for universal vehicle fit.
ENDURING PLATINUM PRECISION - Platinum-to-platinum firing reduces gap erosion and misfires, ensuring peak performance over time.

Autolite APP104 Double Platinum Spark Plugs feature a platinum-to-platinum design with a copper core and yttrium-enhanced electrodes, delivering faster ignition, superior heat management, and longer lifespan. Engineered for universal fit and backed by decades of trusted innovation, these plugs optimize performance and durability for cars and trucks alike.

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€ 38.64

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TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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Brand	Autolite Iridium Ultra
Core Material	Platinum
Thread Size	14mm
Top Material Type	Nickel
Vehicle Service Type	Car, Truck
Global Trade Identification Number	00009100005366
Automotive Fit Type	Universal Fit
UPC	009100005366
Manufacturer	FRAM
Model	Double Platinum Spark Plug
Item Weight	1.76 ounces
Product Dimensions	3.38 x 4 x 1 inches
Item model number	APP104-4PK
Exterior	Brushed
Manufacturer Part Number	APP104-4PK
Position	Center

Autolite APP104 Double Platinum Automotive Replacement Spark Plugs (4 Pack)

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