Volant G3 + Gibson
Gents and ladies:
Ok, I have had the VOLANT G3 AND GIBSON catback exhaust system on my 05 SE 4x4 with Tow package for about three weeks. Here are some my observations. There is definitely some major increase in horse power. More noticeble in the higher rpms but I do not think it has lost any low end power or torque. The beast just seems to breath better now and has so much more reserve power. It take alot less throtle to accelerate and or to manitain speed. Listed below are some speed and rpm numbers. Mind you I did not take any figures before the install, so maybe someone can take them off a stock 4x4 with tow and we can compare.
IDLE: 600 RPM
40 MPH 1050 RPM
45 MPH 1200
70 MPH 2000
75 MPH 2100
80 MPH 2350
90 MPH 2600
As far as fuel economy, my last tank I averaged 14.2 miles per gallon. That is cruising at 75 to 80 on the highway. Other members were right about the fuel economy-- you love to here the beast sing so you give it alot more throttle now to hear the incredible exhaust sound, thus poorer fuel economy.
The beast is even more incredible going up long incline highway hills. There is nothing like putting away those dime a dozen GM Yukon Boxes (tahoes, hummers, suburbans, denalis, and escales) and seeing them go bye bye in your rear view mirror, lol.
There is so much more considerable power, I find myself forgeting this is a 5500 pound suv as it just loofs at 90 to 100 miles an hour. It is a good thing I have diplomatic immunity or a would get a ticket every week--I have roughly a 95% chance of getting out of a ticket.
I have not heard the Borla system but I recommend field testing an Armada with Gibson before you buy and install one. It is not for the meek. I am lucky my wife really doesnt notice the beast sing. It is fairly loud during any time you give the beast some throttle. At level ground and cruising, you cannot really hear anything. However, when you are going up hills or under partial throttle you definitely hear it. When you go WIDE OPEN THROTTLE (WOT), LOOK OUT! In conjunction with the Volant , it sounds like you've got a supercharger underneath the hood!