Dual exhaust system

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slbenz600

Member
Joined
Dec 19, 2019
Posts
40
Reaction score
16
Location
La Verkin
Ram Year
2015
Engine
6.4 L
2015 Ram 2500 4X4 6.4 L Hemi.
I have read different articles on installing a dual exhaust system to increase fuel mileage.
I am here to tell you what I did and increased my mileage by 5 mpg. The message I got from Ram forum was that I shouldn’t mess with the system.
I found exhaust shop that made the exhaust system the way it should have been done but for some reason they made more money by putting one muffler then splitting into two.
I had them cut off the one inch pipe from each side from back of cats and install 3 inch pipes thru 2 flowmaster mufflers and out the back.. Besides increasing fuel mileage it woke up the motor, this is a awesome motor and know by far the strongest gas motor ever.
 

Pktatum95

Junior Member
Joined
Oct 24, 2021
Posts
22
Reaction score
22
Location
Ohio
Ram Year
2017
Engine
6.4 hemi
2015 Ram 2500 4X4 6.4 L Hemi.
I have read different articles on installing a dual exhaust system to increase fuel mileage.
I am here to tell you what I did and increased my mileage by 5 mpg. The message I got from Ram forum was that I shouldn’t mess with the system.
I found exhaust shop that made the exhaust system the way it should have been done but for some reason they made more money by putting one muffler then splitting into two.
I had them cut off the one inch pipe from each side from back of cats and install 3 inch pipes thru 2 flowmaster mufflers and out the back.. Besides increasing fuel mileage it woke up the motor, this is a awesome motor and know by far the strongest gas motor ever.
Any loss in low end torque when towing?
 

Daw14

Senior Member
Joined
Nov 29, 2017
Posts
2,027
Reaction score
2,077
Ram Year
2014
Engine
5.7 hemi
2015 Ram 2500 4X4 6.4 L Hemi.
I have read different articles on installing a dual exhaust system to increase fuel mileage.
I am here to tell you what I did and increased my mileage by 5 mpg. The message I got from Ram forum was that I shouldn’t mess with the system.
I found exhaust shop that made the exhaust system the way it should have been done but for some reason they made more money by putting one muffler then splitting into two.
I had them cut off the one inch pipe from each side from back of cats and install 3 inch pipes thru 2 flowmaster mufflers and out the back.. Besides increasing fuel mileage it woke up the motor, this is a awesome motor and know by far the strongest gas motor ever.
:lol::lol::lol::lol::lol:
 

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