Dual exhaust to increase milage?
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Joined: Aug 2012
Posts: 10
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From: Boulder City, Nevada
Dual exhaust to increase milage?
Have an 03 Durango SLT with 4.7, 3:55, auto 61,000 miles. Will a dual exhaust with stright thru muffler hiflo cats (2) improve milage? If so to what? What size pipes.... use orlginal spech o2 sensers? What type of mufflers? Any Ideas?
bob
bob
THE ULTI-MOD
Joined: Jan 2007
Posts: 19,797
Likes: 36
From: Union NJ
no it will not improve gas mileage, the stock cat is already a hi-flow unit, and you most likely dont have enough oxygen sensors to run the truck properly in this configuration (you need 4 of them which is only the california emissions package has)