After installing my Longtube headers the Wires are too short too reach the ports, is it possible to just splice in wire or will this not read correctly? Extensions are 40$ for a set and I would need at least two possibly three sets. Thanks for the help.

 

You can buy them with longer leads or extensions (I believe the fronts are 8" and the rears are 13" which will work inplace of the fronts). I would be afraid of splicing due to possibly changing the resistance/ohms in the wires.