Performance Exhaust
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Senior User
Joined: Jun 2004
Posts: 148
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From: Deep in the heart of TX
Performance Exhaust
I am not real knowldegeable on this subject. Does a performance exhaust enhance gas mileage? I was thinking of a cat back system or dual exhaust. If it does, which is preferred for a 1999, F150 with 5.4L? The application would be for daily driving not competition. I understand there might be conflicting opinions on this. If there is already a thread out there on this subject, let me know and I can check it out. Thanks
Logistics Pro
Joined: Feb 2000
Posts: 3,957
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From: Mesa
I put true duals on my 97, 4.6 and on my 07 5.4. Didn't do a whole lot for the 97 but the 07 liked it. MPG may go up a lil but the fun factor is a lot better. Since there are already dual cats just cut out the Y and dual it from there.
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DBUCKWILD
1997 - 2006 Expedition & Navigator
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Jun 8, 2001 01:20 PM
