HP Copper Spark Plug

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Part
ACCEL 346C1

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.

  • One Piece Design - Won't break off in head during removal like two piece designs
  • The Copper core is a better conductor than Iridium or Platinum plugs
  • Copper dissipates heat much better than other materials
  • "C" - Cut Design un-shrouds the spark kernel for a better burn
  • Unlike Iridium or Platinum plugs, the ACCEL HP plugs are gapable
  • Machine rolled threads for precise thread engagement
  • One step colder than stock
More Information
PartACCEL 346C1
Manufacturer Part Number346C1
UPC90127745694
BrandACCEL
Emission Code2
Heat Range1 Step Colder
Part TypeSpark Plug
Reach.8125"
Seat TypeTapered
StyleCopper Core
Thread Size16mm
Typeproduct
Item ReturnsThis item can be returned

BrandACCEL
Emission Code2
GAPn/a
Heat Range1 Step Colder
Hex Size9/16"
LengthStandard
Product TypeSpark Plug
Projected TipNo
Qty1
Reach.8125"
ResistorYes
Seat TypeTapered
StyleCopper Core
Thread Pitch1.25mm
Thread Size16mm
Torque Specification20-25 lb.ft

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