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Double Platinum Shorty Spark Plug, 14mm Thread, .708” Reach

Double Platinum Shorty Spark Plug, 14mm Thread, .708” Reach, Tapered Seat 5/8ths Hex, Projected Tip, Resistor


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Fits 1992-1997 LT1 LT4 engines, GT40P heads, and more


These ACCEL performance spark plugs produce a larger spark for more power at high rpms. They improve throttle response and fuel economy and reduce fouling. Their purified Alumina insulator prevents arcing, and their machine-rolled threads protect heads. The double platinum electrode ensures a long life ACCEL's patented race proven spark plugs in a Shorty configuration. The overall length has been reduced ~3/16" to gain critical air gap between the spark plug boot and the exhaust manifold or header tube. This helps eliminate burning the spark plug boot or dimpling the header tube. The shorter spark plug length also can make it easier to install an remove the spark plugs in certain applications where there is not a lot of room to fit a socket or move a wrench around.


  • Double Platinum Electrode for long life
  • Shorty Spark Plugs For Tubular Exhaust Headers
  • Eliminates Dimpling Headers For Added Clearance
  • Improves Spark Plug Access To Fit Socket Or Wrench
  • Shorter Overall Plug Length Vs. OE Style Plug
  • Projected Tip
  • Helps Eliminate Burned Spark Plug Boots
  • Shorty Header Spark Plug
  • Machine rolled 14mm threads protect your valuable cylinder heads


Emission Code1
Product TypeSpark Plugs
Reach0.708 in
Thread Size14mm
WarrantyLimited 90 Day Warranty
Part NumberP526S

Tech Resources

Fits 1992-1997 LT1 LT4 engines, GT40P heads, and more

Service Parts


This part is legal for use on Emissions Controlled Vehicles when used in accordance with the manufacturers application guide because it has a California Air Resources Board Executive Order number or 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
  • 1968 and newer Foreign manufactured vehicle
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        Some parts are not legal for use in California or other states with similar regulations.