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					Originally Posted by waynieZ  Hi What size hole did you use to get the main harness for your LS  ECU through the fire wall? | 
	
 You are going to mount the ECM in cabin I take it ?? I mounted my ECM by the battery tray/fender. Only wires going through the firewall are for the DBW pedal and OBD port. Harness runs through inner passenger fender (out of sight)