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Dec 19, 2014Explorer
Duel Exhaust
Grandson wants to install duel exhaust on his 08 GMC Sierra 5.3L engine. Any drawbacks to this or is there an upside. I've heard both. With the valve overlap and less back pressure you lose low end torque and MPGS on the other side sounds good and increase in MPGs 2 to 3.
What's everyone's opinion?
What's everyone's opinion?