Dual exhaust question

[Steve Krusich]

I have an '07 V8 with the Zabtech throttle body, the KKM CAI, Amsoil 5w20 and custom tunes from my SCT2. My question is this....what additional MPG improvement, if any, can I reasonably expect if I install a Cat back dual exhaust? Thanks



Steve

 

[Todd Z]

The same as installing a single cat back....



There are no different gains from a single or dual cat back...



any upgrade will get you the most out of it..



Todd Z

 

[EddieS'04]

Go with the magna-flow catback.