Thanks Rockinrich.
Ok, the first bit of good news about our new 2-1 exhaust kit in awhile.
I am about to ship the first 4 kits out to see how they fit other peoples Broncos. We tested this kit on a 77 EB with a 351W, C4 & Dana 20 with stock motor mounts, stock front axle, 3.5' suspension lift and 2" of body lift. We are going to ship the first 4 kits to people with different setups then what we know already works.
I am very interested in seeing how it fits on a EB with an AOD/4R70W, NV3550 or AX15.
I am also hoping someone with an Atlas or NP205 transfer case buys one as well. The NP205 and atlas transfer case is one of the primary motivating factors for us to develop a 2-1 exhaust kit since our dual exhaust kit will not work with those transfer cases.
One of the main reasons I shelved this kit earlier this year was after I designed it I had my doubts it would work with the Advance Adapters NV3550/AX15 crossmember. So back to the drawing board and now it should be more versatile. we shall see.
If you are in the market for a 2-1 exhaust kit here are some of the parameters I have to sell it within.
-does not work with any long tube headers
-If you have a 351W the two rear primaries of the PS shorty Drake header will most likely make contact with your inner fender. It makes contact on our 77. See pic below
-only tested with drake shorty headers(EB specific) so far which are sold by most EB vendors as well as Drake direct and Cj pony parts
- at this time the 2-1 kit works with just the Drake shorty headers but we are looking at how it fits with EB specific JBA shorties. The designs are very similar to Drakes. Over time we can look at other shorties too.
-We believe this kit can work with stock non emission EB exhaust manifolds but won't know till next month
-head pipes and merge pipe is 2.25" then mid pipe and tail pipe is 2.5"
-if you want to run our 2-1 exhaust kit and need headers you can buy both from us for as little as $560 and it all ships in a 41x27x7 box(big shipping savings)
-these 2-1 exhaust kits will price out between $319-$399 depending on which muffler you want.
-current muffler options are Flowmaster Delta 44, Magnaflow, Cherry Bomb Pro and Jones Full Boar(first time offering Jones brand)
-headers are $239 for black and $299 for stainless and essentially ship for free but only if you buy the 2-1 exhaust kit at the same time and the shipping is only free if we have the headers in stock.(we plan on keeping them in stock but we don't have any control over that)
-headers use a ball flange to seal the collector to the adapter and adapters have O2 bungs already installed.
-we do not currently offer a shorty header with ceramic coating.
-we plan on offering the 2-1 exhaust kit in stainless with all stainless clamps and muffler but it will be closer to $600 retail. Don't expect the stainless version out till 2019
-we also plan on offering a hardware kit for guys who want to weld the kit together if there is a demand for it.
That about covers most details. if you're interested in being one of the first to try this kit Please Email me at
monstermikeduff@gmail.com There are a few people already in line but I am looking for a particular combination of the drive train and other things. In the subject line please type your first and last name then JAMES DUFF 2-1 EXHAUST KIT.
In the email please list off a few things so I can quickly decide if you are a good candidate for the first 4 kits we are sending out and so I can keep track of your specs.
- engine
- engine mounts
- what headers/manifolds you're currently running and do you plan on keeping them?
- transmission
- transmission crossmember
- transfer case
- front axle
- body lift
- suspension lift
- rear inboard shocks yes/no
- rear 4 link yes/no
- what rear gas tank
- what rear bump stops
Thank again everyone for your patience. I am excited to make this a reality!
*NOTE* In the pics below I did not stage the stainless version of the shorties for you to visualize. I will get pics of that later this week or early next week. Bug me about it if I forget.
MM