Gibson Split Duals installed today @ 1800 miles. So far very unimpressed!.
When they started the truck to back it off the rack, I COULDN'T hear it idle. On the drive home, I could tell there was something different, but nothing like the Flowmaster I had on my previous Explorer. And I have read a lot of posts to know that I need to give it time. If it doesn't get louder, look for a classified for sale. One Gibson Model 9504
low mileage, hardly used, make an offer.

------------------
2001 Lariat SCrew Oxford White / House of Kolor Sunset Orange Pearl 2Tone.
TruckMaster Designs FD630-S AirDam,AirAid,Gibson9504/Split Rear Exhaust,Fac Moon Roof,3:55LS,6CD,Gen III/Beige,Steps,Slider,Tow,Capt's,Bed Extd, Bell Tech 2" Shackles

 

I was also unimpressed with my Gibson split rear when I first heard it. Where was the rumble. Now I have had it on for about 7000 miles and am very happy with it. At times I wish it was a little louder at low RPM's, but when I get on it I can feel the rumble. I don't feel like sacrificing sound for performance. After installing the Gibson I a now able to get my 285's spinning whithout a problem. Also it may be my imagination but I think my system has gotten a tad bit louder over time. Not much just a little bit.

------------------
Silver 1998 F150
4x4,XLT,Supercab,5.4 Short Box,3.55 gears Captains chairs
Mods...
-Superchip
-Gibson Stainless steel catback, dual out the rear, 3 1/2in. Gibson tips.
-K&N air filter
-Silver bug deflector
-Soft tonneau
-Tinted windows
-Westin nerf bars
-BFG 285/75/16's
Sound System
-Alpine CD player
-Soundstream 6 1/2in. Seperates
-JL Audio stealth box
-Powered by a Sounsteam Reference 405