Do long tube headers improve or decrease gas mileage? My car already drinks gas and would prefer if it did not get any worse

 

It should free up some gas mileage. Increased flow = Increased economy.

 

Depends...... you might hit the fun pedal more cause it sounds so good!

Patrick

 

It's a mustang why is gas mileage on your mind I have never understood this. It's like the people that buy a SUV and then complain about the gas mileage.

 

Because some people want a mustang but they can only afford one car. Therefore it is probably a daily driver, and you need some decent gas mileage. How is that so hard to understand?

Back to the main topic: I didn't really notice a difference one way or another

 

This is in fact the car I drive to work every day. I cant afford to get 12 mpgs.

 

Bam! I knew it!

Then again, you have 4.10s and cams, so you can't be too worried about gas I guess...

I'll tell you this. I had ARH 1 5/8" LTs and O/R X with the Borla Stingers, and the trumpeting was too much for me. I switched to Pypes mid-mufflers and the trumpeting is a lot less, but it's still there to a degree. I just hope I don't have to change any part of the exhaust once I get my cams in.

 

Is trumpeting the same as drone? I have pretty bad drone. I avoid certain RPM ranges when I am cruising. The 410s didnt kill my gas mileage too much. My commute consists of alot of city driving so it is easier to get to cruising speeds faster.

 

It's going to be a while to justify a $600-1200 investment in headers (more if you farm out the labor) to make up for any fuel mileage increases. If you get a 2 mpg increase that cost is about 21.4 cents per mile savings at $3 per gallon. If you go with Kooks ($1,200) plus labor ($400) it will take you about 80,000 miles to break even. You would probably make more money by putting the cost of the headers into a CD.

PS, my math sucks, but you get the idea.

 

i didnt notice a change in my mileage after the LT's