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Autolite-AR3910X Ar High Performance Racing Non-Resistor Spark Plug, 4-Pack

Autolite-AR3910X Ar High Performance Racing Non-Resistor Spark Plug, 4-Pack

Q: This spark plug makes my Predator - 212cc engine run very hot compared to a standard spark plug, is it normal to gain 30+ temps using this plug?

It can increase the heat of the engine if you only have stock parts, and could overheat it. I have a bigger fuel jet to let more fuel in, odd as it may seem, more gas cools the engine. These plugs burn basically all the gas that goes in, thus it will get hotter. I would recommend a larger fuel jet, mine hasn't overheated since I got one...Gives a noticeable amount more power as well (Gave my 500 pound go kart 10mph more speed). ;)

Q: Does it increase horse power

It’s more about slightly increasing compression do to plug design lowering the cc’s in the head! It’s true!

Product ID: 68566183

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Details

Brand
Autolite Ultra
Core Material
Nickel
Thread Size
14mm X 1.25
Top Material Type
Alloy Steel
Vehicle Service Type
Car

⚡Cut-back electrode for faster ignition

🔥8% cooler side wire temp

🛡️Nickel-plated corrosion resistance

Description

⚡ Ignite your engine’s full potential with Autolite Racing Spark Plugs!

RACE PROVEN DURABILITY - Yttrium-enhanced alloy cuts side wire temp by 8%, extending spark plug life under extreme conditions.
LIGHTNING FAST IGNITION - Cut-back ground electrode design accelerates flame kernel growth for quicker, more reliable starts.
TRUSTED LEGACY OF EXCELLENCE - Backed by over 100 years and 11 billion plugs produced, Autolite delivers OE-quality you can count on.
CORROSION RESISTANT CHROME FINISH - Nickel plating guards against rust and wear, keeping your plugs race-ready season after season.
PRECISION FIT FOR PEAK PERFORMANCE - Vehicle-specific fit ensures optimal combustion and engine efficiency tailored to your ride.

Autolite AR3910X Racing Spark Plugs feature a yttrium-enhanced alloy that reduces side wire temperature by 8% for improved durability and less pre-ignition. Their cut-back ground electrode design promotes faster flame kernel growth, ensuring quicker ignition. Nickel-plated for corrosion resistance, these plugs are vehicle-specific and trusted by professional racers, backed by Autolite’s century-long legacy of producing over 11 billion spark plugs.

Specifications

Brand	Autolite Iridium Ultra
Core Material	Nickel
Thread Size	14mm X 1.25
Top Material Type	Alloy Steel
Vehicle Service Type	Car
Global Trade Identification Number	00009100031105
UPC	009100031105
Manufacturer	FRAM
Model	AR3910X-4PK
Item Weight	1.92 ounces
Product Dimensions	1.4 x 0.45 x 0.16 inches
Item model number	AR3910X-4PK
Is Discontinued By Manufacturer	No
Exterior	Chrome
Manufacturer Part Number	AR3910X-4PK
Position	Center

Have a Question? See What Others Asked

This spark plug makes my Predator - 212cc engine run very hot compared to a standard spark plug, is it normal to gain 30+ temps using this plug?

What size plug wrench does this plug take?

How much longer are these compared to NGK race plugs extened tip ?

Does it increase horse power

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