I went with Borla. Those valves are in the pipe right before the muffler and will be removed
), the materials and quality of the build are outstanding. There are lots of ways to go for most any budget, as a quick search on the forum will tell you, but in the 7 months I was waiting for my truck I saved up and purchased the Borla (S) Exhaust and a Diamondback Tonneau cover and I've never second guessed the decisions.
My lifters went out when I already had aftermarket exhaust and a cold air intake, and the dealership replaced them with no questions asked. The Magnuson-Moss Warranty Act states that a manufacturer cannot deny warranty coverage due to the presence of aftermarket parts, unless they can prove that the aftermarket part is the source of the issue in question.
The valve is to quiet down the engine when DFM or AFM cylinder deactivation is active. Otherwise it would sound like a lawn mower lol.
If you custom ordered your TrailBoss from GM and elected to have the GM Performance Exhaust installed as an option, what your getting is the Borla Touring Exhaust. Im actually having it installed with the black quad tips tomorrow. There is no worry of exhaust causing lifter issue or voiding factory warranty. Reason why i went with the Borla Touring, quality, warranty and i didnt want anythig to loud or the dreaded exhaust drone.
haha that makes sense, I've been looking at the Borla as well as the AWE catback exhaust, only concern with any aftermarket exhaust is when towing I don't want to hear the constant sound of the aftermarket exhaust in the higher RPM ranges.
I have the Borla S and really have not found towing to be a problem with it, though I was a bit concerned prior to towing that it would be. I think it probably has to do with the 10 speed tranny. Even with the 6K plus trailer, and in tow mode I don't see those high rpms that would make it sing. I live in the Rockies at 6700 ft, and usually head uphill to camping so you think it would be worse. This is with the 5.3 BTW. I would certainly think twice before getting the Borla Atak on a 6.2... All in I've found the Borla S to be very manageable sound wise. Great at cold start with an immediate settle down and if I want to sound like a 6.2 it's just a pedal stomp away!!
Thanks for the input, the Borla S-Type I have on my ZL1 works as you describe as well. But that car has actuated valves as well, so I didn't know if eliminating the valve on the TB would make it worse.
