After Market Exhaust Kits ??

[mysticz]

Hi,

Anyone know if there is a affect on mpg when changing to a aftermarket exhaust kit(borla, magnaflow and etc.? And if so how much of a drop in mpg?

Thanks

 

[schwalmy]

i havent noticed a huge drop with mine.....i do know that when i first had it it went down a bit as i wanted to hear the rumbel
over all now with my regular driving style it seems to be fine with little (very little) difference
that and my volant kit helped alot with mpg
cheers
schwalmy

 

[marnok]

I've had my Magnaflow exhaust on for about 3 weeks now, and my MPG has dropped from 18 MPG to 17.9 MPG!

So not a big difference.

 

[nh00gts]

I have a magnaflow exhaust and a volant intake. My truck gets between 17 and 19 and thats with my wife driving it. She pushes it hard so she can hear the rumble.

 

[cpayne5]

I've had my Magnaflow exhaust on for about 3 weeks now, and my MPG has dropped from 18 MPG to 17.9 MPG!

So not a big difference.

Hey there, neighbor. :hello:

 

[sharp4runr]

yeah I've had the Magnaflow on for a few months and now noticeable difference. When I first got it, mpg dropped as I was stomping on it to hear the new rumble

 

[mikestang]

Exhausts do not add air or fuel to the combustion process, they merely make it easier for the engine to exhale, so you actually will (should) see an increase in gas mileage if your diving habits don't change. I picked up about .6 mpg with mine (after I got over the step-on-it-to-hear-it thing ).

 

[Casper]

Exhausts do not add air or fuel to the combustion process, they merely make it easier for the engine to exhale, so you actually will (should) see an increase in gas mileage if your diving habits don't change. I picked up about .6 mpg with mine (after I got over the step-on-it-to-hear-it thing ).

I completely agree. Though generally due to the reduction in pumping losses and increase in exhaust velocity the ECU will tune for automatically for increased efficiency.

 

[mysticz]

Thank you all for the great response to my questions.

Now that I know my mpg won't drop much, I ordered my magnaflow kit and will be here next week.

Thanks again all.