ACCEL HP Spark Plugs are made with a Copper core which is a better conductor than Platinum and Iridium. They deliver a stronger spark especially in high performance applications where high combustion pressures are present. Copper is much better at dissipating heat than other materials which lessens the chance of a misfire. ACCEL HP Spark Plugs are gapable allowing you to open the gap exposing a larger flame kernel or close it if needed for high boost applications. All ACCEL HP Spark Plugs have machine rolled threads allowing for a more precise thread engagement and torque retention.
Specs
Brand
ACCEL
Emission Code
2
GAP
n/a
Heat Range
Stock
Hex Size
9/16"
Length
Standard
Product Type
Spark Plug
Projected Tip
No
Qty
1
Reach
.8125"
Resistor
Yes
Seat Type
Tapered
Style
Copper Core
Thread Size
16mm
Weight
1.0000
Part Number
346
Emissions
2
This part is legal for sale and use on Emissions Controlled Vehicles when used in accordance with the manufacturers application guide because it is a direct or consolidated replacement part.
The following vehicles are considered Emissions Controlled Vehicles:
1966 and newer U.S. manufactured California Certified vehicles
1968 and newer U.S. manufactured Federally Certified vehicles
