Repeater replacement transmitter PMTE4004A

[RF_Burns]

I have an XPR8300 repeater (UHF 45W) with a faulty transmitter. The existing transmitter is a PMTE4004A however under MOL they also show a PMTE4004AS "Service Kit" as well for a few dollars less. All I've been able to get out of Motorola is the PMTE4004AS has a note saying it does not include the "heat spreader" which I'm guessing is the heat sink. for the few dollars difference I'll get the 4004A with the heat sink, but what else might make them call it a Service Kit?

Anyone know if I should be ordering the PMTE4004A or the PMTE4004AS?


Thanks all