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Part# REM40E
MFR Model# REM40E


In the early 1900s, small planes flew with single ignition systems powered by adapted automobile engines using Champion-brand automotive spark plugs. By the 1920s, the company had developed innovative spark plugs designed specifically for the aviation industry.

Champion Aerospace designs and manufactures Champion-brand piston-engine ignition components for both OEM and aftermarket for general aviation aircraft applications. Every spark plug manufactured has built-in design advantages that assure longer life and greater reliability.

A typical spark plug number with symbol explanation

1. Resistor None--No Resistor R--Mil-Spec. Resistor-Erosion protection
2. Barrel Style None -- Unshielded E -- Shielded 5/8"-24 Thread
H -- Shielded 3/4"-20 Thread (All Weather Plug)
3. Mounting Thread -- Reach -- Hex Size B-18mm 13/16" / 2.06cm 7/8" / 2.22cm M--18mm 1/2"/1.27cm 7/8"/2.22cm
L-14mm 1/2"/1.27cm 13/16/2.06cm U18mm 1-1/8"/2.85cm 13/16/2.06cm
J -- 14mm 3/8"/0.95cm 13/16/2.06cm
4. Heat Rating Position Low number--cold High number--hot
5. Electrode Design None-Conventional single E -- Two prong massive
N -- 4 prong massive
W -- Fine wire (Iridium) B --2 prong massive, Tangent to Center
P--Fine wire (Platinum)

* Shielded barrel thread size. Check barrel size - 5/8x24 or 3/4x20 threads before ordering and select proper plug number, See page 236 for Sparkplug Application Table.

** The "Iridium S" sparkplugs replace the Platinum and "W" Iridium types. Increased bore diameter improves scavenging action. Greater clearance volume can accept more combustion deposits. Single Iridium electrode offers greater resistance to lead attack. Easy to clean Easy to gap

Spark plugs are shipped in factory sealed plastic cases. Opened spark plug cases make the spark plugs non-returnable. Please do not open any spark plug until you are sure you have received the correct spark plugs for your application.
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Outstanding product and service Aircraft Sprucr

Gary C
January 23, 2020

Plugs were shipped in protective packages. Just what I needed for my O-470 Continental Engine. Great choice.

Mike S
January 17, 2020

Good product, as usual. Delivered promptly, friendly phone service.

November 24, 2018

Fast delivery, quote and invoice. Easy and convenience supplier. TQ- Malaysia

Mylab S
June 19, 2018

Had 2 sets of new Tempest plugs, in a new engine, fail. Changed to Champion and no more problems. Definitely worth the $6 dollars more.

Greg B
January 12, 2018

Champion is Champion, we use this Plugs for more than 40 years in our Piper Pawnees, they run more than 1000 hours a year, under very hot climate conditions in Colombia (SA)

Andres K
October 27, 2017

Sims R
March 9, 2017

these are a very good product for the money. I run these in a cessna 150 with a lycombing o-320. we put more than 300 hours a year on the plugs. still going stronge

Bob H
April 26, 2013

I bought 4 and the standard spark plug socket does not fit them.

Adam F
November 29, 2019


Q: Is there a difference between the UREM40E and the REM40E spark plugs? Are they interchangeable?

There is no difference in the applications of UREM40E and REM40E. They are the same spark plug manufactured by different companies. Tempest makes the UREM40E and Champion makes the REM40E.

Q: Do Champion REM40E plugs come with the required gasket?

Yes, each plug will include a copper gasket.

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