start from the middle and work your way out... that will get you the best seal. The o2 sensor should "clip in" some where close to teh block.
install:
1. Just find the o2 sensor which is sticking out of the header (exhaust maniflod) and follow the wires to where it ends. Disconnect that from the clip.
2. Go under the car and disconnect the midpipe from the header
3. Disconnect the header from the block.
4. Remove the o2 sensor from the header.
5. Install o2 sensor in new header
6. Connect the new header to the block (tighten from inside out)
7. Connect midpipe to header
8. Reconnect o2 sensor harness back to the car.
is it legal? Probably not, unless its a DC Sports header. They always seem to have CARB legal headers. Most of your off brand and ebay headers are not CARB approved.
