Yes it will. Not a huge difference, but if you put a nice dual exhaust system behind them, including a balance pipe, you will increase your horsepower and your mileage. You might expect to see 1-2 mpg.
Two good parts for a 1998 Dodge 1500 with a 5.9 liter engine that increase power and mileage are high performance air and fuel filters.
It will increase performance but will decrease mileage, not increase it. More performance uses more fuel.
12
I added: Hypertech chip, K&N air filter, headers with dual exhaust. The best improvement came from the headers.
City is 14, highway is 20.
13 city 16-18 HWY
cold air intake
It can vary from 8 mpg to 15 mpg
Gas mileage for a 1999 Dodge Ram 1500 5.2 L is 11-12 mpg in the city and 17-18 mpg on the highway.
There are some practical ways to increase the gas mileage but you can use also Fuel Infusion what is a powerful fuel catalyst. Fuel Catalyst realy helps to increase to boost your engine power and your gas mileage.
18 MPG highway @ 65 MPH. 10-14 city
The price of a 2003 Dodge Ram will vary depending on the condition and mileage of the vehicle. As an average the 2003 Dodge Ram 1500 would cost $9,196.