| Description | Part Number |
|---|
For most Lycoming and Continental engines
(on Continental engines REM40E replaces EM41E) | REM40E |
| Cooler plug used on Lycomings and Continentals | REM38E |
| Used on Radials and larger Lycomings / Continentals | REB37E |
| Designed specifically for Lycoming 0-235 K/L/M engines, but also used and approved for the 0-230 and 0-360 of 180 hp or less (not turbo) when encountering lead fouling. | REM37BY |
| Originally Designed for Franklin engines but now commonly used in VW engines converted for aviation use. | REL37B |
| Unscreened | M41E |
