Product Code: 3095-Config

Customizable Aluminized Dual Exhaust Configuration, 1966-75 Bronco

(32 customer reviews)

Installation Note:
Installation Notes:
  • Our long tube headers are back with an improved design. This required us to re-engineer our dual exhaust at the same time. Please see #3140 for the headers and our new stainless exhaust system #3141 or aluminized exhaust system #3142.
  • Does not work with James Duff 4-Link
  • Modification is required for 76-77's equipped with catalytic converters.
  • Designed to work with the stock transmission cross member or the advanced adapters cross member #3654.
  • Our classic "Duffy's" long tube headers are not compatible with Stage 8 Header Bolts
  • This system is not compatible with JBA headers
  • This system is not compatible with ZF-5 transmissions unless modified.

Contents

Includes:

  • 2 Before Muffler Pipes
  • 2 Muffler
  • 2 After Muffler Pipes
  • 2 Tailpipes
  • Aluminized Kit includes Saddle Clamps
  • Hardware Kit

Options: 

  • Purchase Duff Shorty Headers (3106) at the same time.
  • You can purchase angled or straight exhaust tips to finish the exhaust off.
  • We highly recommend purchasing the premium header bolts (3082) and Remflex gaskets (3050) for a trouble-free install.
  • Optional ceramic coating that resists temperatures up to 1600° F. They are chip, and abrasion-resistant; lower underhood and floorboard temperatures; and have a “polished/aluminum” look that does not blue.
  • Optional satin black cerakote option comes with the same benefits and has even higher heat resistance up to 2300° F and cerakote is even more durable than ceramic.
 

Information

Looking for the best exhaust for your early Bronco? This easy-to-install exhaust has many options to customize it to your Bronco's needs.

After 20 years of selling our dual exhaust kits, we went back to the drawing board to make them more install-friendly and customizable. We separated the back pipes into 2 sections also allowing for options on the exit angles and easy removal for trail riding to avoid tearing them up. If you do smash one of the tailpipes on the trail you can purchase new replacements here. This kit can be used with our headers or stock Early Bronco manifolds (see optional #3091 for manifold downpipes). It comes with custom bent aluminized 14 gauge 2 1/4" diameter pipes and mufflers of your choice: Turbo, Pro, Vortex, Flowmaster 40 series, Magnaflow or Borla.

Fits whether you have a 302 or 351W, stock or heavy-duty aftermarket motor mounts, stock-3" body lift, our Extended Radius Arms, Torque Tamer Traction Bar, 4" Rear Bump Stops and 23-gallon gas tanks.

Use the drop-downs to configure your exhaust. If you have a non-standard engine-transmission combination, please use the notes section at check out and we'll contact you if there is a fitment issue.

NO WELDING REQUIRED, can be installed in your driveway. Exhaust pipes exit just behind both rear wheels, choose 65° or 90° angle.

Comes with instructions, hangers, and mounting hardware.  

Muffler choices:

  • Turbo: Offer less restriction and longer use than glass packs as well as better performance and a nice resonant mellow deep sound. 100% mechanically locked aluminized steel. Quietest of all the options.
  • Cherry Bomb Pro: Deeper more aggressive tone 100% welded aluminized steel with a grey finish. Loudest of all the options. This is what we have on Hobby Horse.
  • Cherry Bomb Vortex: Utilizes fiberglass and a patented baffle design to absorb both high and low-frequency sounds. It has a nice rumble but without the tinny sound of Pro/Flow. Less sound inside the vehicle at speed. Great for rigs that spend a lot of time on the highway. 100% welded aluminized steel with high temp black finish. Highest flow rate available. Slightly larger than the other choices at 14x4.25x10.25" but we've been running these on Hi Ho Silver without issues for several years. They hang down just a little farther than the Torque Tamer.
  • Flowmaster 40 Series: Signature deep more aggressive tone. 100% MIG welded 16 gauge aluminized steel.
  • Magnaflow Stainless Steel: Nice, resonant mellow deep sound.
  • Borla PRO XS Stainless: Compact size is perfect for applications with limited space. Reversible design for installation flexibility. High-quality T-304 austenitic stainless steel will never rust. 100% welded construction for strength. Free Flow design for improved performance. High-temperature continuous-filament fiber (CFF) acoustic material for sound control. Natural mill finish can be brushed or polished prior to installation. Deep mellow rumble then quiets down during cruising.

Features

Features:

  • 16 gauge Aluminized Mild Steel 
  • Fits 289, 302/5.0L, and 351W/5.8L
  • Compatible with C4/AOD/4R70w Ford automatic transmissions
  • Compatible with 3 speed, NP435, AX15, NV3550 & ZF5 manual transmissions.
  • Compatible with the Dana 20 transfer case or Advanced Adapters Transfer Case.
  • Engineered to work with our #5350 & #5355 Radius Arms.
  • Engineered to work with our Torque Tamer #5326
  • Clears LCR SS20 or 23-gallon fuel tanks

FAQ

Q: What add-ons should I consider before purchasing this exhaust?
A: If you are purchasing the raw stainless finish headers. We highly suggest wrapping the headers in heatshield products lava wrap to keep the heat out of the engine bay and off the floorboards. We also highly recommend installing the premium header bolts (3082) and Remflex Gaskets (3050) for a trouble-free installation.

Q: Is this system compatible with SS Dominator Headers?
A: No Please see 3141.

Q: Is this system compatible with the advanced adapters AX15 crossmember?
A: Yes.

Q: Is this system compatible with other manufactures headers?
A: No. It is only compatible with the Duff/Drake shorty header (3106)

Q: Is a lift required for the installation of this system?
A: No.

Q: Can I get this system with tailpipes exiting the rear?
A: No, tailpipes that exit the rear will allow exhaust fumes to enter the passenger compartment on Early Broncos.

Q: I want to buy ceramic or cerakote headers for my new engine will that be a problem?
A: If your new engine requires a break-in period when first fired up then you do NOT want to install new ceramic or cerakote coated headers. use a pair of old manifolds or headers for break-in.

Q: How will I know if my new engine needs to be broken in?
A:  If the new or rebuilt engine has a new flat tappet cam installed, it will need to be broke in.  If the new or rebuilt engine has any roller cam check the mfg guidelines of your cam before breaking in your engine. If no break in is required then you can install any header of your choosing that we offer.

Check out our other FAQs here.

Compatibility

Works with all pushrod SBF engines:

 289 / 302 / 5.0 / 351W

– 0″ or more suspension lift

– 0-3″ body lift

– Any OE, non OE and aftermarket transfercase

– C4, 3 Speed, NP435, AX15, NV3550 (Still testing C6, AOD, 4R70W, ZF 5-speed)

-WILL NOT WORK WITH ANY LONG TUBE HEADERS without SERIOUS MODIFICATION

-WILL NOT WORK WITH JAMES DUFF 4 LINK without SERIOUS MODIFICATION

*Not tested on 1976-77 equipped with catalytic converters.

Instructions

Click here for installation instructions.

Looking for how to install this system? Click here for installation instructions.

Prop 65 Icon

Weight 70 lbs
Dimensions 42 × 8 × 25 in

32 reviews for Customizable Aluminized Dual Exhaust Configuration, 1966-75 Bronco

  1. orloff12 –

    Very easy to install, hardest part was getting to the header bolts. Exactly what I was looking for. Fixed my exhaust leaks so my EFI can finally learn. Now I don’t smell exhaust fumes! Now I just have to figure out the right muffler. Didn’t give it 5 stars because I received defective headers with my kit. JDI of course took care of me.

  2. Wayne Woods –

    I tried to get pricing from some local exhaust shops for a custom system, most wouldn’t even give me a quote as the body is off for a frame off rebuild. Really? How much easier could I make your job? The prices I did get were more than this kit with freight, and wouldn’t have been this nice. Duffs has hit another home run with this kit! Lots of variables covered and designed into 1 easy to install (with the body on or off) system with plenty of muffler choices too. Thanks again for all the time you put into R&D. Great service and fast shipping as usual.

  3. Trent Bonnett –

    Another quality product from James Duff. I was fortunate to visit the shop and hear this system on one of their Bronco’s .The whole family was sold when the fired it up.

  4. Michael Benson –

    Fit great and installed by myself in half a day. Love them.

  5. TIM L SIMS –

    I WAS VERY SCEPTICAL ABOUT A BOLT ON EXHAUST SYSTEM. VERY PLEASED. I ORDERED WITH MAGNA FLOW MUFFLERS. IT INSTALLED EASY AND SOUNDS GREAT.

  6. Jason Justice –

    I’ve never done an exhaust system before and I cannot imagine any kit going together better than this one. Looks and sounds great!

    **If you are running Tom’s Bronco Parts SS long tube headers and buy the Duff adapter, don’t bother ordering the Stage 8 collector bolts. They are not long enough to work. You will have to use the bolts that Tom’s provides with their system.

  7. Mark Larsen –

    Great fit. Customizes well with some trimming. I actually finished it off by welding the joints. Nice product.

  8. William Thornock –

    product looks solid. still gotta put it together.

  9. Paul Welch –

    Sounds good and looks good Easy install, but I used my own hangers. I didn’t want to drill my frame.

  10. Charles McCutcheon –

    So far I’ve done a kit for Tom’s bronco long tubes, stock manifolds, and recently WH’s shorty headers. The first two kits were excellent. I know kits like this can require some modifications. On the shorty headers, I had to cut a section out on the pass side. The pipe wanted to go above the Cross member, but it really needed to be straight. So I bought a 18" resonator pipe with slip fit On both sides. I cut the S shape bend out and used the 18" straight and it fit perfectly. All in all, great product.

  11. Jeff Flinders –

    Everything arrived in tact and without visible damage. Installing was very simple and fit perfectly. Only negative things I have had an issue with…I have broken about 6 u bolts due to the pipes not sealing. Heated up pipes and cranked down more to stop small leaks at seams. Had to buy about ten more to ensure pipes would compress enough to seal. One of the Flowmaster mufflers had a spot that was not welded on the seam causing a leak there as well. I reached out and the customer rep. Said he would send me a new one after I sent him pictures. I sent them right away, it’s been a week now and still no replacement muffler. I welded up the seam and will reach out in another week if I have not received by then.

  12. Tyler H –

    This exhaust system came in the mail within a few days and was super easy to install. I recommend this system to anyone who is considering replacing the exhaust in their bronco.
    I have the body off my frame, and a very stock set up. It took a little wiggling and twisting to get everything to line up correctly, but with an extra pair of hands to hold the pipes, I am very happy with how everything looks. I didn’t need to modify the pipes at all.
    Just add a little grease to them so they don’t get stuck together!

  13. Mike Beatty –

    I wanted new easy to install exhaust… who else to call ? Easy Duffs !!!
    I called their Tech line because I’m a Firefighter not Bronco Specialist…
    Tech guy walked me through the whole order , asked me questions about my type of driving etc..
    We decided on which muffler choice to get… Bam a few days later it was at my door.
    Exhaust was a breeze to install (except lower passenger side flange bolt to manifold… kind and of a bugger …
    A few short hours later I have a new , Bad A@@ sounding Bronco….
    I highly recommend Duffs !!

  14. Chad McCance –

    I had a pretty custom setup I was looking for. with a 351, ax 15, dana 20. I looked at many options for finding a system that would fit without having to do a lot of fabricating. Finally I contacted Monster Mike by email after several back and forth emails he recommended the long tube headers and dual exhaust setup. I ordered this with the ceramic coated header option, and I have always liked the sound of magnaflow mufflers and I like the fact they are stainless steel. this is not offered on the website as an option so again I emailed monster Mike. they set me up with a custom kit that had everything I wanted. when I got it, it fit perfectly no clearance issues and it looks amazing. I can’t wait until I get it together to actually hear it. if you want to see pictures of it installed https://classicbroncos.com/forums/showthread.php?t=289385&page=6

  15. Trent Bonnett –

    After visiting Duffs and hearing this system on one of their Broncos, it was a no brainer. I ordered it as soon as I got back home. The installation as simple and straight forward. Always exceptional customer service.

  16. Stephen Ackerman –

    Fast service. High quality exhaust system. Perfect fit. Great instructions. Could not have been better. Very happy with my purchase.

  17. James Gilbreath –

    Exhaust system arrived in heave cardboard box. After opening the box everything was packed well and in good order. Predicting the exhaust pipes required minimal filing and rounding the edges of the pipes. Everything fit as expected and a now installed. Looks great also.

  18. James Varney –

    Very easy to install with clear instructions also bought the long tube headers great fit with some persuasion

  19. Clifford Harrelson –

    Easy install because it’s Bronco specific. Quality material, it looks like it’ll stand up to the elements for years to come. And 4 different muffler choices is just the icing on the cake. Highly recommend this set up.

  20. Gerald Belrichard –

    Outstanding product! Perfect fit and easy assembly. Increased performance!!
    After 35 years as a Ford tech I can say it would be hard to find a better exhaust system. Buy with confidence!

    Thank you Brian & Mike…

  21. Oliver Kellogg –

    Exceptional product, great sounding

  22. Anthony Adams –

    Very well built kit. High quality materials right down to the self tapping screws. Easily installed on my 76 Bronco. Wish they had an option for tail pipes straight out the back. That’s why I didn’t give 5 stars.

  23. Paul Brannon –

    This system went i about as easy as could be expected. and they sure do sound good on top of how good they look. thanks for a well designed system.

  24. Malcolm Sherbine –

    I received a call from James Duff to ask me some question about modifications to my bronco. I had a 3.5″ suspension lift, NV3550 trans, and 23gl tank. They though the new kit would fit the NV3550 trans. When I opened the box it was missing the after muffler pipes, call, they shipped next day. Installed the down pipes and them the intermediate pipes. The angle was a little off because trans cross member. The drivers side was hanging to low and the passenger side was to high/angled up to the point the muffler would not install. Took some measurements and headed to a muffler shop. Tweaked the bends on the driver side, up and then the second bend back down, pushed it up about 2″. Passenger side increased the bend back down about 3″, mufflers installed perfectly. Everything else installed easily The only reason I gave the 4 was because the after muffler pipes were not in the original shipment.

  25. raymond savoie –

    With the exhaust adapters for Toms long headers this was the easiest exhaust system I can remember putting together. Excellent product thank you Duff for doing all you research

  26. Ronald Bjorkland –

    Shipping was fast. Fitmet was perfect. No issues so far.

  27. Ronald Bjorkland –

    Shipping was fast. Fitment was perfect. No issues so far.

  28. Robbie Julian –

    The new exhaust system fit nicely and sounds very good! Can’t wait to get it out on the road. About three weeks out.

  29. Robert Gault –

    I have not been able to install it yet. But the guys at James Duff kept me informed when it would be shipped. It was on back order, but I was not in need of it yet, since I am building my Bronco. Everything came in with no issues. Got it waiting to install. Thanks for keeping me informed on the status of the back order.

  30. Brian –

    Exhaust was as described and with fast delivery

  31. Mark Bryant –

    Very satisfied with ordering, info, and of course the exhaust system!

  32. Kevin Fisher –

    Very Happy with the ceramic coated headers and the aluminized dual Exhaust with Flow Master mufflers. Well packaged and Fast Shipping. Thanks

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