I have an 06 Grand Marquis GS. V8 flexfuel engine. Will putting a dual exhaust system improve gas mileage?
Maybe a small amount and you will pick up a few HP as well. I would expect no more than 1 mpg if that.
2 out of 2 people think this is helpful.
The cost of it is no way no how worth it
5 out of 5 people think this is helpful.
Search Mercury Grand Marquis Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Mercury Grand Marquis Experts
Related Models For Sale
Used Lincoln Town Car
34 Great Deals out of 2,102 listings starting at $1,995
Used Ford Crown Victoria
6 Great Deals out of 1,392 listings starting at $1,700
Used Chevrolet Impala
902 Great Deals out of 35,274 listings starting at $1,700
Used Dodge Charger
467 Great Deals out of 30,103 listings starting at $2,275
Used Ford F-150
3,021 Great Deals out of 207,756 listings starting at $1,000
Used Chrysler 300
468 Great Deals out of 22,680 listings starting at $1,000
Used Cadillac DeVille
4 Great Deals out of 1,964 listings starting at $1,600
Used Cadillac DTS
55 Great Deals out of 1,805 listings starting at $2,100
Used Chevrolet Tahoe
819 Great Deals out of 27,811 listings starting at $1,700
Used Buick LeSabre
10 Great Deals out of 2,254 listings starting at $1,299
Used Honda Accord
994 Great Deals out of 75,205 listings starting at $899
Used Toyota Camry
1,159 Great Deals out of 97,111 listings starting at $1,250