I had muffler fitment issues and I found the flowmaster Fx were pretty small and fit perfectly, I have two of between my gram and a 205 on my Yj with wiggle room. Sound good too I think


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Jonny - Thanks a lot for posting all this detail of your build. You are making me think about mine and how I can use some of your ideas on my build! Please keep it up!

 

Thanks!

Muffler showed up, snuck out to the shop and it should fit fine. I guess time will tell if it keeps the motor quiet enough on it's own to get into Holly Oaks.

 

Muffler looks just like the one on my jEeP. It is behind a 5.3 and is fairly quiet until you stand on it, even then it is not horrible.

 

Glad to hear. I’m guessing you haven’t been flagged heading into the dunes?

 

My buggy failed last fall. I put a couple additional resonators in the system.

 

love the progress! The exhaust is always something I dread. That's why I wanted to go twin turbos, make it simple! lol. My old mopar 360 before turbo would melt your shoes while at silver lake because the exhaust ran close to the floor. Was great when it was cold out as I did not have a heater.

Loving the tabs with nutserts. I have always welded a nut on the back. What tool are you using?

 

Getting closer..

 

Good progress today. Exhaust is done up to muffler. This has been a job I was dreading for a while. I am happy I mad it this far.

Next up is to see if I can add a tail pipe. I have a few 3” mandrel bends and some straight pipe.

 

Wrapping the front section may help with heat, just be sure to cover up any exposed skin... Fiberglass sucks

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Yup I wrapped my exhaust with a cheap kit off Amazon and it helped tremendously, but dam is that stuff nasty. You can shower and still itch like crazy. I’d definitely wrap it. Keep some heat off that tranny too


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Looks good.

 

I think I will run the exhaust down the outside of the frame rail. My current thought is to dump just in front of the rear axle with a turn down pointed to ground. That balances getting exhaust behind me for sound, and not having pipe in danger hanging low out back.

 

Full flex. It likely won’t run back this far, but it has clearance in worst case.

 

I like it John.

 

Turn it sideways. It sucks facing down on dusty trails


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Main reason for pointing down is to help with noise, otherwise I would just shoot straight back.

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DNR told me the best way to reduce noise level at testing was to point in a direction that they couldn't get the meter to. No one is going to crawl under your rig to get the right position/angle.

 

 

Another week, another pile of parts on order. I'm waiting on the yokes for the BKOR carrier bearing. No word yet on how long they will be backordered. Also grabbed a few misc axle seals I need to finish up axles. Just waiting on a friend to slow down on OT work to install gears & lockers.

I ordered a couple of 3" v-bands. The first will be installed at the rear of the muffler. The second will be at the turn down. If I'm riding somewhere where dust is a bigger issue than sound, I can loosen the v-band and spin the exhaust tip. Also ordered a muffler heat shield to help cool the passenger buns. I already have some header wrap, so once I have exhaust in place I will wrap the forward sections.

 

Another week, another pile of parts on order. I'm waiting on the yokes for the BKOR carrier bearing. No word yet on how long they will be backordered. Also grabbed a few misc axle seals I need to finish up axles. Just waiting on a friend to slow down on OT work to install gears & lockers.

I ordered a couple of 3" v-bands. The first will be installed at the rear of the muffler. The second will be at the turn down. If I'm riding somewhere where dust is a bigger issue than sound, I can loosen the v-band and spin the exhaust tip. Also ordered a muffler heat shield to help cool the passenger buns. I already have some header wrap, so once I have exhaust in place I will wrap the forward sections.

This is a great idea!

 

What did you get for the heat shield? Pretty sure this is something I'm going to have to add as well.

 

I went mid-price. There was one that was $120 and another was $35. I went with the $70 version. I couldn't find any reviews that seemed rational. So I went with a name brand I've seen and I'm hoping for the best. Mostly, I don't want to melt my passenger (or their seat).

Thermo-Tec 16500 Thermo-Tec Muffler/Cat Heat Shields | Summit Racing

Free Shipping - Thermo-Tec Muffler/Cat Heat Shields with qualifying orders of $99. Shop Muffler Heat Shields at Summit Racing.

www.summitracing.com

 

nice work!!!

 

Add that to my Summit Wish List 😁

 

Making any progress? Sounded like you've got a hard deadline coming up 😁

 

Yes he does. And believe it or not, it's this year. LOL

 

I made some extra work with exhaust. I slid the muffler too far forward and it interfered with floor by a curly hair. Last night spent some time working on the fix to that. Needs another hour or so of work and I should have that done.

Over the weekend I finished the exhaust tubing work. It still needs hangers and to paint & wrap the crossover. When it is apart, I will install exhaust manifold gaskets and the oil dipstick tube.

I think up next is fitting the hood and grill so I can set aside space for headlights. I think I'll have trans cooler, steering cooler, steering valve and maybe the battery in front of the engine. I have to see if that can all fit. If not I have to decide what gets tucked behind seat.

This week was last week of my youngest daughter's basketball, and my older daughter wraps up in the next few weeks depending on how far they make it in the playoffs. At it's peak we had 4-5 games a week.

 

My project is about done so I should have more time to get over soon. I'm looking forward to drilling holes in the hood where they aren't needed.

 

Even more reason to get it fitted this weekend, and then hide it.

 

Full bump with hood about where I want it.

 

Thats sexy!

 

Made some aluminum pieces for hood pins where hood hinge would go. Will replace with some stainless hardware. Working on front now.