SOFTWARE COMPATIBILITY: The MCP737EL is compatible with Project Magenta, FSX, FS2004, LVLD767 through CPflight driver and with PMDG series (737/747) through Flightsimlabs driver.

HARDWARE COMPATIBILITY (CPflight modules):
EFI737EL efis selector: Compatible.
CPflight radios: Compatible.
CPflight MIP737 expansion board: Compatible.
CPflight MCPEX1 expansion board: NOT Compatible.
EFI737NS efis selector: see following.

Even though the EFI737NS selector it works with the MCP737EL, consider that it is dedicated to the standard low cost product line, so it have different look, different front plate production technology, backlighting and so on. The suitable EFIS selector for the MCP737EL is the EFI737EL version.