Metal enclosed plug cover shields spark plug from heat and moisture. Ideal for use where RF suppression and low ohm resistance is needed. The industry standard for radio equipped aircraft. Screws directly onto solid wire plug wire. 5000 ohm Resistance. OK to use with resistor spark plugs.
Your comment is OK for use with resistor plugs ROTAX SAYS NO ! Resistor caps are NOT to be used with resistor plugs. Could you explain your comment.
Thank You, jim
These caps, when used with NON resistor plugs ( B8ES ), are GREAT for ignition noise suppression. Have them (4) on my Rotax 582 on a RANS S-10. Local ATC says there is a distinct improvement.