Okay so I was trying to figure out if I had a header leak or not, because at certain throttle points i hear this sound which i thought was metal, but I actually think its something metal or clicking in my interior from the possible vibration of the excess gas being allowed with the less restrictive headers compared to stock.


With my mods, going between 80-95 cruising and flooring it to 80 at about 4 total toll booths, otherwise crusing in 5th and very little gas to pass, should I be averaging about 25mpg?

 

Sounds good to me man.

I just got gas and calculated 23.2mpg for city/hwy driving 50/50.

Headers and intake improve gas mileage.

 

mpg seems about right. my setup is similar 50/50 however cruise at 65-75, mileage 27-29mpg 3 seasons, about 24-26 winter.