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Go Back   ClassicBroncos.com Forums > 66-77 Ford Bronco > Bronco Chat > Vendor Forum & Current Mass Buys

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Old 11/02/18, 04:06 PM   #1
jduffent
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Knoxville, Tennessee
Joined: Jan 03
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New Product Release 11-23-18 DIY 2-1 Exhaust kit from James Duff

Introducing our new 2-1 DIY exhaust kit that will be available to the public 11-23-18

SHORTY HEADERS FOR THESE KITS HAD A 2-3 WEEK DELAY &
WILL NOT BE AVAILBLE TO SHIP TILL THE 1st-2nd WEEK OF DEC. We still encourage you to place your orders early. First orders in are first to ship and if you order our 2-1 exhaust with shorty headers we will ship the order complete.

Here is the link for 2-1 with shorties
https://www.dufftuff.com/2_1_exhaust..._v8_p/3060.htm

here is the link for 2-1 used with exhaust manifolds
https://www.dufftuff.com/2_1_exhaust..._V8_p/3061.htm

If you'd just like to purchase the shorty headers, click the link below
https://www.dufftuff.com/Shorty_Head...nco_p/3106.htm

For years we have been selling a great DIY dual exhaust kit that performs very well and sounds great. Especially when you pair it with our industry leading long tube ceramic headers. Now also available with black heat temp paint. There's only one problem, these parts won't fit on everyone's Early Bronco. The moment you add an Atlas or 205 transfer case the dual exhaust kit we sell wont work. We also recommend the shorty headers for anyone running a 4R70W or an AOD transmission. Our long tubes just barely fit with those transmissions and in some cases it requires A LOT of extra effort to get the passenger side long tube in w/o damaging the paint or ceramic coating.

We now have a solution that covers those issues plus it works with several other drive train configurations, can be used with stock EB (non emission) exhaust manifolds or the very reasonably priced Drake shorty headers. If you are already running shorty headers we know our kit also works with JBA shorties. It has NOT been tested with any other shorties on the market. Feel free to email monstermikeduff@gmail.com if you'd like help identifying the shorties you are currently running.

The details:
-2.25" aluminized steel head pipes and merge pipe
-2.5" mid pipe & tail pipe
-choice of muffler 2.5" C/C
-SS Magnaflow - nice resonant mellow deep sound
-Jones Full Boar - deep more aggressive tone. Comparable to a flowmaster 40
-Flowmaster Delta 44 - signature sound of the 40 series without the over powering drone or in cab resonating
-Cherry Bomb Pro -Deepest most aggressive tone of the 4 choices
-hardware kit and instructions which include info on how to properly install Drake headers.
-No welding required

The good:
-fits 289, 302, 5.0 & 351W engines
-currently tested and approved to work with these transmissions with shorties & stock EB manifolds
----C4
----stock 3 speed
----NP435
----AOD
----4R70W
----AX15
----NV3550
----Transmissions we havent tested. Top Loader 4 speed w/ or w/o OD, C6, ZF 5 speed, NV4500 & 6R80
-Keep in mind using a aftermarket (racing) bellhousing may also cause clearance issues.
-works with stock EB (non emission) exhaust manifolds
-works with Drake shorty headers offered in black painted, stainless & ceramic coated
-works with JBA shorty headers.
-can be used with all drivers drop transfer cases
-comes with in depth instructions with several pictures
-works with high pinion dana 44 Full Width or EB width
-will sell 2-1 exhaust kit without mufflers just like we offer for our dual exhaust kit. please call the office to request this.
-can ship the 2-1 exhaust kit and shorty headers in one box which makes shipping extremely affordable.

The bad
-2-1 kit does not work with long tube headers
-not compatible with P heads w/o modifications to some of the primary tubes
-if you have rear inboard shocks this kits tailpipe may make contact with your passenger side shock - it tested favorably on one setup but we haven't tested them all
-if you have a rear 4 link suspension system this kit will not fit w/o serious modifications.
-if you are running stock EB manifolds we have a kit for you but not in stainless till spring/summer of 2019

Shorty header important info:
-the shorty headers we offer with this kit are designed to work with 289, 302 and 5.0 engines
-they come with installation hardware and MLS header flange gaskets - no instructions from the manufacturer included
-not compatible with explorer P heads without extensive modifications
-requires mods to work with a 351W
----back 2 primaries on passenger side contact inner fender
----collector flange on passenger side sometimes requires some slight trimming before install unless you have aftermarket motor mounts that move your motor up .25 to .75 inches

Application and adaptation: available 11-23-18 (except stainless options)
Now that we offer a 2-1 exhaust kit with an optional shorty header we have a few new options available plus we are extending our accessory line up that compliments all our exhaust systems.
-stainless stage 8 locking header bolts
-stainless polished slip over tips (typically tack welded on but can be screwed on too)
-header & tube wrap
-spark plug boot insulators
-muffler heat shield
-optional weld on hardware kit for 2-1 and dual exhaust kits available 2019
-optional hardware upgrade to SS band clamps kit to eliminate saddle clamps available in 2019
-stainless tubing, muffler & hanger options available in 2019
- will be looking into a catalytic converter upgrade in 2019
-if you want to purchase the shorty headers we sell and want to run (or currently running) our DIY dual exhaust kit, we have made adapter head pipes for that kit. Part# 3069 Keep in mind shorty headers will ship in a separate box when purchased with our dual exhaust kit so there will be added shipping costs for that.

Prices on 2-1 DIY exhaust kits will range from $319 to $399 depending on muffler choice.

Shorty headers are $239 for black and $299 for stainless, Ceramic is $359 and ship at no additional charge when they are bought and shipped at the same time as the 2-1 exhaust kit.

If you are interested in our dual exhaust kit it is available here:
https://www.dufftuff.com/Dual_Exhaus...zed_p/3095.htm

As new information arrives we will do our best to add it here.

Please feel free to ask any questions and we or Monster Mike will chime in.

JDI
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Last edited by jduffent; 12/04/18 at 12:57 PM..

http://www.dufftuff.com
The Bronco Specialists since 1967
865.938.6696 m-f 10-6 EST
Now: Knoxville, Tennessee (Exit 110 off 75)
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Old 11/16/18, 07:19 PM   #2
Monster Mike
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I have several updates on our 2-1 exhaust kit and there are several more coming.

First off we were able to do some more testing and found our 2-1 exhaust kit will work with:

-NP435 transmissions using a 289/302/351W
-keep in mind if you made a custom crossmember for whatever reason it could interfere with the merge pipe. Our system is designed to work with the stock crossmember and the Advance Adapters NV3550/AX15 crossmember.

-JBA shorty headers designed for a 66-77 EB

-Full width dana 44 front axles

-We redesigned the drivers side head pipe to accommodate more drive train configurations and now we will be testing it to see if it will work with EB width high pinion dana 44 axles. Originally it would not work. If you have this axle under your EB and want to use this exhaust kit, email me at monstermikeduff@gmail.com

NEWS/UPDATES

-The shorty headers we are providing with this kit will now be offered with Ceramic Coating. The price point is not official but we are expecting it to be around $370

-The first shipments of headers will ship to us at the end of NOV. They will be available to order 11/23 and we estimate shipping to you will start the 1st or 2nd week of Dec. We will be offering the shorties in black paint, stainless and ceramic.

-if you have a 351W and want to run these headers we want you to know these headers were not designed to work in an EB with a 351W. They fit fine on the driver side but you literally have to shove them between the head and the passenger inner fender to bolt them on and then the two rear primaries will make contact with your inner fender unless you clearance/modify the inner fender or the header. We had to remove the valve cover just to get the opportunity to shove the header into position. On some Broncos the passenger side shorty may also make contact with the frame at the collector. Its easy to modify/clearance but again, one more hassle to deal with. Trust me, I am taking steps to get the engineers involved to fix this but it could take years to see a change if they even are interested in making it.

Last edited by Monster Mike; 11/16/18 at 07:43 PM..

Product and Warehouse manager at James Duff Inc. The Bronco Specialist since 1967. You want Quality American made Bronco parts? Then give us a call at 865-938-6696 or check us out at dufftuff.com James Duff Now in Knoxville, Tennessee. Open 10-6 Mon-Fri EST.
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Old 11/21/18, 04:40 PM   #3
Monster Mike
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Knoxville, TN
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Installed the AX15 in our display chassis today using the Advanve Adapters bellhousing adapter and crossmember and mocked up our 2-1 exhaust kit. Its looking like a go!

Anyone running a NV3550 using the Advance Adapters install kit with their crossmember will also be able to install our 2-1 exhaust kit

Product and Warehouse manager at James Duff Inc. The Bronco Specialist since 1967. You want Quality American made Bronco parts? Then give us a call at 865-938-6696 or check us out at dufftuff.com James Duff Now in Knoxville, Tennessee. Open 10-6 Mon-Fri EST.
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Old 12/02/18, 02:34 PM   #4
jduffent
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Bronco born and raised

Knoxville, Tennessee
Joined: Jan 03
Posts: 492
Hey everyone, wanted to share with you some great news.

Packaging and shipping our first run of 2-1 Exhaust kits next week. 12/3/18

We've updated the first post to show everyone the details of this kit.

Thanks to Monster Mike for putting in huge amounts of overtime to get this kit dialed in so we could offer it with free shipping for Black Friday.

He has tweaked this kit several times so it will work with many different drive train configurations as well with two of the most popular shorty headers available on the market today that do not already offer an exhaust kit to go with them.

We will continue to make this kit more versatile in 2019.

Thanks again for everyone's patience and continued support with James Duff Inc.

http://www.dufftuff.com
The Bronco Specialists since 1967
865.938.6696 m-f 10-6 EST
Now: Knoxville, Tennessee (Exit 110 off 75)
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Old 12/02/18, 03:26 PM   #5
bronconut73
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How did you do that?

Orlando
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Quote:
Originally Posted by Monster Mike View Post
Installed the AX15 in our display chassis today using the Advanve Adapters bellhousing adapter and crossmember and mocked up our 2-1 exhaust kit. Its looking like a go!

Anyone running a NV3550 using the Advance Adapters install kit with their crossmember will also be able to install our 2-1 exhaust kit



Get some sleep Mike.

'73, 3.5" sl, XL RS9's, F-250 mounts, Duff long arms, 1" bl, 35" MTZ's, C-4, twin sticked, P.S., built 351W, Exp Serp, F&R Detroits, 4.11's, chromo axles, 11 leaf packs, SuperJoints, Chevy front disc, BC rear disc, BC Vintage a/c, Scat Procar 2K seats, Alpine/Pioneer, Bear, Cobra 148 GTL/Texas Star.
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