I used the flowmaster delta 44, 67.88 plus 40 to weld in. Sounds great. I'm going to modify the old heat shield and install above the muffler. The muffler listed as 2 1/8, thought it would fit inside, did not, the muffler is weld made with a thick pipe. It ended up being the same outside diameter as the stock pipes.
2006 Rubicon unlimited, silver. 5.5" long arm lift. 35" BFG KM2's on 15" black steelies. skidrow steering skid and radiator skid . LOD rear bumper with tire carrier. Flowmaster 44 exhaust. .CB with tuffy Overhead storage . Offroad lights in bumpers front and rear plus 2 more on the winch hoop.
I just ordered a 3.5 inch wide 8" long cherry bomb glasspack for $30 I cant wait to hear how this will sound. I youtubed some vehicles with a 3.8L and I liked it. Some people dont like the glasspack style sound but to me they sound great.
07 JK 2D X model with 6 speeds. Full Traction 3" ultimate lift kit. 315x75x16 Toyo Open Country M/T on Rock crawler procomp rim. Ruby dana44's front sleeved inside/outside C truss and rear with 5.13's gears. Homemade rock guards, rear bumper w/tire carrier, oilpan/tranny skid, evap canister skid, light bar, switch pod. Riddler diff covers, Cobra 75 w/wilson antenna, Polk speakers, 10" sub, 2x Amps, Lightforce 240 drive light, backup lights, rock lights.
I raised the budget on mine to just under $200 and went with the HushPower (by Flowmaster) and a stainless tip.
There are more pics in my thread but here are a couple. Jim's Jeep the obsession lives on!