Re: Jeep WK diesel exhaust?
Neither, but if I was forced to choose I would go with the 3" with no muffler = less weight and better flow.
I used to run a 3.5" straight pipe on my 6.0 F250 making 400 rwhp on a race tune. So 3.0 with a 3.5" exhaust and muffler no where near that hp level is way overkill.
2014 WK2 EcoDiesel LTD, Trail Rated, GDE tune, Offroad Exhaust, 275/70/18 Duratracs
2008 WK CRD LTD - GDE ECO Tune, 3" Intercooler, CBE exhaust, GTB2260VKLR, 3.07 gears
2007 WK CRD LTD - Max output, GTB2265VKLR, Long travel, wilwood brake 6 piston front 4 rear