I'm curious, my brother in law and I both have '97 ford x-cab 4X4's pretty much the same truck's except for color and mine has the off road pkg. I had my flowmasters' custom installed (true duals) 2 1/4" cut in front of the Y, two 2 pass flowmaster's angled out at a 45deg. in front of the rear bumper with the 3 1/2" x 18" BIG tips (sounds great) $400.00
His system is the gibson bolt on 3" system cut behind the Y single all the way back, decent sound at low rpm. $285.00

------------------

 

How does the Gibson sound under wide open throttle? what motor are you talking about?

97 150 lariat 4x4 orp, 4.6l

 

Why don't you guys do your own comparison test? Track gas mileage over a couple tanks of gas, go check 1/4 mile times, race one another, and then post the results! A good first hand real-world test should prove interesting and valuable for all us confused folks searching for answers!

------------------
Paul... :-)
99 F-150 XLT SC Sport, 4.6L, Auto, Captain Chairs, Class III Towing Package, Sliding Rear Window,
White, 4X2, CD, Soft Factory Tonneau Cover, K&N Filter, Line-X Spray on Bed Liner
More to come