Major kudos! Thanks for taking the time to write this all up and compliment it all with pictures as well. A great resource for others in the future, for sure. Keep the posts coming!
Thanks for the kind words. Light bar, transmission cooler, and other cheap mods coming soon!
any story behind this exhaust system
The Daniel Hays custom edition super 40 is still sitting on my back porch. That one is 2.25". After that whole debacle, I decided to do the full 2.5" exhaust and just ponied up for a new muffler like I should have to begin with.
Good move swapping from the aftermarket hitch to the Mopar one. Looks much better.
When I originally purchased the first hitch, I thought that's what I was getting. I actually ebayed the rear bumper at the same time. When everything arrived, the hitch was what you saw there, and the bumper was light gray instead of dark. So I just used the hitch, and let the bumper sit in my garage until I ended up with the parts Jeep, swapped hitches, and kryloned the bumper. Few weeks later I kryloned everything else to match. But I agree, the hitch hanging below the bumper is a terrible eyesore. But now I've got the whole factory tow package (except for the darned 3.55 gears).
The exhaust sounds great, nice build thread too!
Thanks! I'm hoping the exhaust tone will get a little bit deeper after I replace the restrictive (and also failing) precats to the magnaflow cats. I also really
want to put in Doug Thorley headers, but just don't have that kind of cash to drop on it right now.
Good idea on the 4.7 tail pipe. I had one of those "well duh, why didn't I think of that?!" moments.
If you don't mind saying, how much did it cost you and where did you get it from?
I pulled mine off an entire parts WJ that I had purchased. It was really convenient that it included some extra 2.5" pipe, since the guy who had it previously had replaced the muffler with a straight pipe. That said, I can't imagine any junkyard charging all that much for a stock piece of pipe.
Now, I'm no exhaust expert (that would be Kolak), but from just looking at the differences in the exhaust pipes, my opinion is this: The stock 2.25" pipe on the 4.0 is god awful. Like absolutely freaking horrible. The bends look like Jeep started with a straight pipe and hired a drunk guy with a hammer to make it fit. Already pretty tiny, it has to get cut down to less than 2" in some places, gauging by looking at it. The stock 4.7 pipe, on the other hand, is a whole world of better. The bends are far more graceful, and it maintains a much, much more steady shape and size the whole way down. That said, I don't doubt that Kolak's or even IRO's more precisely engineered and mandrel bent pipes would show better flow numbers. In fact, if I'd had the cash to drop, I would have gone ahead with Kolak's exhaust. But with this thing just sitting there waiting to be welded up, it was an extremely worthwhile no brainer.