Product Summary

Gasket Spark Plug Seat Style, 0.75" Spark Plug Reach

  • Recommended for all 2006 and up Edelbrock flathead Ford cylinder heads
  • Guaranteed to deliver quick starts, good fuel economy and smooth acceleration
  • Engineered to work very well with our flathead ignitions
  • Features a 14mm thread pitch that has a 3/4" reach
  • Made from a copper core material and has a nickel alloy tip

Key Specs

MFG. Part #71 RC12YC

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Return Policy


These copper core spark plugs are recommended for all 2006 and up Edelbrock flathead Ford cylinder heads. They are guaranteed to deliver quick starts, good fuel economy and smooth acceleration. Works very well with our flathead ignitions.

Spark plugs are SOLD EACH.

Item Details

5/8" Hex, 3/4" Reach, 14mm Threads


CARB Warning

For race/ off road use only

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.


MFG. Part #71 RC12YC
Spark Plug Seat StyleGasket
Spark Plug Reach0.75"
Thread Pitch14mm
Thread Length0.75"
Insulator TypeProjected
Spark Plug Heat Range12
Core MaterialCopper
Tip MaterialNickel Alloy
Overall Length2.96"
Wrench Size5/8"
Sold in QuantityEach
GTIN Code037551011025