Add headers & get better gas millage?

[Klaus]

I'd say do the math before you leap. How much gas can you buy for $2500?

For simplicity, let's say gas is $2.50 per gallon, and you get 12 miles per gallon stock, and would get 14 miles per gallon with the new exhaust, which will cost $2500.

If you drive 100,000 miles, gas is going to cost you $20,833 with the stock setup. With the new exhaust, the gas will cost $17,857. That's a difference of $2976. So the new exhaust will save you a whopping $476. This is provided you drive 100,000 miles AFTER you install the new exhaust, and don't have to spend any additional money to have any work done on the headers during that time for things such as blown gaskets, loose bolts, rust holes, or heat damage to other things under the hood.

Now, what happens if you only drive it 50,000 miles? Stock, gas will cost you $10,417. With the new exhaust, gas will cost you $8,929. That's a difference of only $1488. The new exhaust will not even pay for itself!

Also, consider the warranty hassles you may have with the dealer.