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Aviation Spark Plug With the most automated manufacturing processes and the most innovative spark plug in the aviation industry. Made in USA.

High Conductivity Copper Core Center Electrode copper, co-extruded inside a nickel alloy sleeve ensures outstanding heat and electrical conductivity while the nickel sleeve offers high resistance to corrosive combustion gases.

High Alumina Ceramic Insulator high mechanical strength, superior dielectric properties, proprietary protective glaze, provides high performance to conquer severe operational conditions. "Clean Collar" massive electrode "V" tip focuses heat to reduce fouling and enhance heat range control.

Proprietary Glass Center Seal 21st century 'fired in' resistor replaces the multipart screw, spring, carbon pile stack up used in competitive plugs and known to suffer from resistance value instability that can cause misfires, wasted fuel, engine roughness.

Nickel Finish environmentally preferable electrolytic nickel provides outstanding durable finish, superior corrosion protection, and extreme wear resistance.

Nickel Ground Electrodes aviation grade nickel electrode design focuses on minimizing sparking voltage requirements while maintaining specification gaps to ensure large, stable 'flame kernels' for on-time ignition and complete combustion.

Vacuum Infused Center Electrode proprietary, vacuum infusion process seals electrode/insulator gap providing stable heat range and superior center electrode cooling (heat flow to the insulator).

Hot-Lock Assembly intense pressure and heat create positive, zero-leakage, shrunk in seal between insulator and shell to contain the hot, high pressure combustion cycle gases.

Harness Wire Contact smooth, uninterrupted, oxide treated spring contact surface offers enhanced corrosion resistance, is chemically bonded to the fired-in resistor providing the ultimate harness/spark plug termination integrity and energy transfer.

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A brand spanking new set of spark plugs solved all my problems. Ok, not all my problems... I still have the ex-wife and I am still expected to show up for work on a regular basis. But the stumble that I had when I advanced the throttle is gone and the engine runs smoother than it had in a long while. So, with those two things, my other problems are forgotten for a while. At least until I tuck her back in the hangar and close the hangar door and have to come back to reality.

Christopher F
July 7, 2020

We love our Tempest Plugs. Made in America too.

Robert B
May 7, 2020

I have always had excellent service and quality products.

Lavoy A
November 18, 2019

Good product. Arrived earlier than expected

October 27, 2019

Got 700 hr on these in my C172 O320 D2J before the center went football. Pretty good in my book.

John J
November 15, 2018

Fast shipping from Spruce!

July 2, 2018

I had an intermittent stumble I was trying to sort out and replaced Champions that were only a few hundred hours old (previous owner) with these Tempests and problem solved. The resistance in those other plugs were different in every plug! These were all exactly the same. Happy.

Tony R
June 21, 2018

May 11, 2018

Great plugs that always test good on resistance. More prone to rusting barrels than champion due to being polished rather than gslvinized. But work great.

Top F
October 11, 2018


Q: Regarding Part # 08-00046 Tempest UREM38E: Do the plugs come with a copper washer / gasket?

Yes, all Tempest spark plugs will come packaged with a copper washer / gasket.

Q: What is the part # of the cooper gasket for Tempest spark plug UREM38E? I would like buy it.

Use part # 07-01798 for a box of 100, or part # 07-00877 for individuals. See Accessories tab for ordering.

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