I installed a 2.25 exhaust from the manifold back w/no cat and a high flow exhaust and milage has gone done a few miles per gallon. Does the 22r need some back pressure to operate efficently?

 

Wow ain't that a bummer.. I'de think like you did a new exhaust would improve MPG

Hey keep us posted on what you find out...

 

weather

the weather just turned cold (-15) and snow when I first tried to check milage. Also had the intake in a position less then ideal. Weather got nice, fixed the intake and milage improved about 1 to 2 mpg-20.5 to 22. Seems to have more pep to.

 

When i installed my exhaust my MPG went down, cause i started driving and revving the **** out of my truck cause i like the way it sounded. After that faded away it went up by i think almost 5 MPG from my best estimate.