The 9-6437287-8: This is a 26-position, 4-row male header from the TE Superseal series, pitched at 0.118" (3.00 mm) between contacts.
Right-angle orientation and locking ramp for vibration resistance
Temperature range and voltage rating for under-hood duty
The polyester insulation material holds its dimensional stability across that range, and the mounting flange adds mechanical retention against cable strain.
Listed as Active with ROHS3 compliance.
Key difference: 9-6437287-8 carries 26 positions at 3.00 mm pitch, while 1318699-3 has 12 positions at 4.20 mm pitch. The 4.20 mm pitch allows higher current per contact (5 A vs the 3.00 mm pitch ceiling), but the 26-position version packs more signal density into the same board edge.