I just upgraded to a DC 4-1 SS header and AEM V2 CAI. Would I gain or lose miles/gallon? I am also planning to add a comptech SS exhaust.

 

depends......you shouldnt see any loss or gain in mpg, because once you have those parts on, you (i know "I") step on the gas and get on the throttle more often just because the power is nice and the sound is even better....so it all depends. I wouldnt worry about it at this stage

 

upgrading those parts should be beneficial... especially with those name brands.

 

i dont think you will see a difference but you will be on the pedal more

 

I haven't installed the exhaust yet, so I'm still running on the stock exhaust. Due to the restriction from the stock exhaust, would I be running into any miles/gallon loss?