Header help
Reply #3 –
You have to be a little careful when moving the sensors that far away from the engine...they will have a tendency to run cooler and thus skew the readings...keep them as close to the primaries(in the collector) as you can...it would most likely be worth drilling and welding some O2 sensor bungs in. I have yet to see long tubes without O2 sensor bungs in the collectors....
Nate...your Mac headers don't have O2 sensor bungs in them??? I've seen many that did.