08-30-2010, 07:02 PM
I have an LS1 02' Camaro Z28 that my Dad and I are re-building the engine for. I am contimplating putting LS6 heads and a LS6 cam but I'm worried about gas mileage. Can anyone tell me if it would drastically drop my gas mileage or not?? I want the extra horsepower but not if my gas mileage is going to drop significantly.