Race pak O2 sensor
 

Race pak says 12" from header flange. Which cylinder is best one to put it in? 440 six pack challenger.

Re: Race pak O2 sensor
 

We usually aim for the area near the first bend. As for which cylinder if you are only running one might just put the a bung in each collector and shoot for the average. If you are still putting in all 8 and just switching it from cylinder to cylinder then start at the corners. Really depends on your intake design and distribution if you talk to the carb and intake guys they will want all 8

Re: Race pak O2 sensor
 

If the headers are out I'd recommend putting bungs in all 8 tubes - only costs $50. http://www.motorsportsinnovations.co...band-bungs.htm

http://www.motorsportsinnovations.co...oush-Dcell.jpg