Flowmaster mufflers(Dual exhaust) on a 2003 Dodge Ram 1500(V8:4.7L)?

Would this increase my MPG?
If so, how much?
Does it cause any DAMAGE in the long-run?

{ 2 comments… read them below or add one }

Marie21 August 2, 2010 at 11:07 am

me and my husband put a flowmaster single dumped on our 96 Chevy and it increased our mpg by like 4 or 5 so we were getting about 27 mpg and no it shouldn’t cause any damage it didn’t to ours we had it for about 3yrs and sold it. but I’m a girl and dont no what I’m talking about lol

Amy m August 2, 2010 at 11:11 am

Simply bolting on a flowmaster muffler won’t increase your mileage or your power.Headers high flow cats and flowmasters should increase horsepower and torque by about 15 percent and fuel mileage by 2 to 3 mpg.Also none of that should hurt anything as long as you don’t overdue it with your foot and do your regular maintenance.

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