I had true dual 2.5" pipes and dual high flow cats, dual super 40 Flows and it sounded amazing. I never got around to the X Pipe recommended but sure loved the sound. Mine was a 5.4 FX4 that I ended up dumping the pipes over the axle. Plenty loud to keep a new born from napping in the truck! LOL
I can imagine Super 10's being window rattling!
2009 Expedition E.Bauer 5.4 Family Wagon
2002 F150 XLT SCab 4.2L 4x2 (Nephew's)
SOLD: 2005 F250 KR 6.0 PSD (3rd 6.0 F250), 04 & 05 F150 4x4 SCrews.
NEXT TRUCK: 2011+ Coyote 5.0 SCrew 4x4