S4LN-20 does not have impulse coupling. S4LN-21 does have impulse coupling. |
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. |
Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.
You are correct, only S4LN-21 has an impulse coupling. S4LN-20 does not.
Yes, these are new units priced as each.
Both mags are LEFT rotation, LH and RH are referring to which side of the engine they are installed.
This mag is not impluse coupled so one is not included. The impluse coupling is included with IC mags though.