Have a tuning ? for you, what is more effcient in tuning a car for A/F. Using the bung or tailpipe. I though a bung was better, but I just got my cat tuned and they use the tailpipe A/F method!!! Will this effect my tune and my car as far as reliability and performance?? Should I get it retuned by someone who uses the bung A/F method. Sorry If I sould like a rookie here, but I hope you can point me in the right direction!!!! Thanks Jake