August of this year I traded a unique version of the 08 Dodge Mega cab and 6.7L Cummins into a long bed and I disappointed a friend in Or-e-gun. I must admit the 2015 Chevy Silverado has some great features rides smooth, quiet and pulls my fifth wheel a if it wasn't there. Both are great trucks for pulling. no regrets.
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?