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
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