Did you guys notice better mileage? I found a lost a bit of mileage when I installed a short ram pop intake. I figured it was the maf reading increased air flow. I just recently had a y, metallic substrate cat, and cat-back installed, and I've been noticing slight but noticeable improvements in mileage. I estimate I'm getting an extra 50-75km per tank right now.

Just wondering if any of you noticed mileage gains as well.

 

Around the city, you have less mileage to a tank. On the highway you'll get more. I just have an intake installed and this is what I've noticed in my mileage.

 

Definetly. 99% of us know that. I'm talking about an increase in fuel efficiency after modding the exhaust.

 

I actually am getting worse gas mileage. That is due to the fact that I am flooring it more. I can only assume if I drove the same I would get better mileage since the air is flowing much better. Since I have the extra horsepower I use it at every stop light