I just got a header from a friend it a dc sports header 4-2-1. the problem is that the O2 sensor that is on connects right to the stock header in front of the motor. Now the other ones (dc) needs the sensor to be connected a lot farther underneath, and is too short....Do I need to splice the wires to lengthen it or drill a hole for the sensor and seal up the other one? Please help asap.

 

i would splice the wires 2

 

yup gotta entend em....u can buy a pre- made extension (for looks) oir just make your own...done forget to shield it from the heat.