Widely used Superseal connector used by most aftermarket ECU manufacturers.
 
Supplied with 34 contacts ( Tyco part number 3-1447221-4.  20 awg )    
 
This is the common keyway 1 model.  ( Tyco part 4-1437290-0 ) Take care, this one has two keyways on the top, one keyway on the bottom edge.
 
Used by Motec, ECUMaster, Wolf, Haltech, Link, Vi-PEC
 
ECUMaster Pro 8 +16 connector  "C"
Motec M400, M600, M800
M130, M150, M142 ECUs 'C' & 'D'
E888 expander
PDM15 and PDM30
Dashes  C125, C127, C1212, CDL3
Link
Haltech