prefer these plugs to the champion plugs.

I am a aircraft mechanic/IA I bought these spark plugs to keep ad back up. For a dropped plug or bad plug found during inspection.

They sell my product at their stores, But being they do I should be loyal. But like old habits!! you have to shop!!!!! But doing so !!! I found out The Co. had the best price other than a E bay , very little even their. So I guess it is faster and simple just open the book and order.. SAVE TIME AND !!! MONEY. SOME VENDERS WERE $10.00 HIGHER PR PLUG. AIRCRAFT SPRUCE IS EASY AND FAST.

Good plugs. All checked at appx 1600 ohms and we’re ready to install. Running well on my engine.

Well. Theyre spark plugs. I dont understand why theyre so expensive, since they havent changed in over half a century, but it is what it is. ACS prices were at least as cheap as anyone elses, fast shipping, good service.

Great price, fast shipping!!

The Tempest plugs UREM40E are perfect for my Aeronca Champ O235 Lycoming.

Great pricing and quick delivery

Working great ,better starts and less mag drop

New Sparkers working perfectly. Eliminated some vibrations that the worn out plugs were introducing.

Good product

Arrived on time. Installed and work great. I would suggest that something be added to the description about the need for a specific socket. I regular socket does not fit

Great product

Excellent product. Comes with gap needing to be fine tuned.

Very fast delivery. Aircraft Spruce has always been excellent. Well packed spark plugs .. shipped quickly. Ive been an occasional customer for the last 30+ years and never had a problem.

I’ve always used Champion plugs, but A&P recommended I switch to Tempest. Appreciate they are more affordable and after 10 hours, they are working very well still. Hope they hold up!

Tempest are good quality plugs, better than Champion according to most everyone I ask.

Great so far. Replaced all the top plugs in a o300 with massive and went with the fine wire on the bottom. Woke the old 172 up a little. Got rid of some stumbling.

I like champions, however for practical rea$ons I buy Tempest,, why? They are 5 bucks cheaper. As far as I can tell there are no practical discernible differences between the two makes. I have had champs on one magneto and Tempests on another and it made no performance difference. It be good when we can buy straight automotive plugs, those are the be$t.

Recommended. They work like theyre supposed too. Air tight packages also.

They have been lasting well over 600 hours in our club with no issues.

Seems like a more substantial, better plug than the Champions they replaced. Had 12 Champions in my O300. At annual, found seven that failed a resistance check after only 200 hours in the engine. A&P was not surprised and recommend I buy the Tempest. Purchased these, they all passed the check (as they should being brand new). Installed easily and engine is running great.

Just went up about 2 bucks again quietly :/, went to auto zone for socket to fit these, found a deep 7/8 socket for oxygen fitting with split down the middle for about $13.00 that fits perfect.

Nice product, better than champions, but. Flats on the plug body are lower than the champions profile and it took me to three different sources before I found a 7/8 inch socket that would fit the plugs . Hint:: Stick with the standard plug profile.