Description
Experience the engineering excellence of our one-piece construction headers, crafted in the USA. The equal length tubes are designed to maximize horsepower and torque while ensuring compatibility with various engine and transmission configurations.
Key design features:
– Starter removal possible without header removal
– Clearance for steering and clutch linkage
– Constructed from 16-gauge 1 1/2″ diameter tubing
– Smooth flow leading into 2 1/2″ final diameter collectors
– Follows the same routing as the stock exhaust system
– 3/8″ thick flange to enhance strength and prevent gasket blowout
Compatibility:
– Fits 289, 302/5.0, and 351W/5.8 engine conversions
– Suitable for C4, AOD automatics, and manual transmissions
– Custom intermediate pipes required for NV3550 or AX15 with new cross member
Important details:
– Not recommended for use with C6 transmissions due to fitment issues
– Incompatible with GT-40P heads
The Duffy’s Original design has evolved since its update in 2001 to better suit our #5350 Radius Arms. Each product includes hardware, premium gaskets, and detailed installation instructions.
Finish and durability:
– Inside and outside metallic ceramic coating
– Resists temperatures up to 1600° F
– Excellent rust, chip, and abrasion resistance
– Lower underhood temperatures
– Polished/aluminum appearance that does not blue
Recently introduced is the Black Cerakote option, offering higher heat resistance up to 2300° F and greater resilience than traditional ceramic coatings.
Legal considerations:
– Not compliant with Stage 8 header bolts
– Not legal for sale or use in California on vehicles with catalytic converters due to emission regulations
For installation instructions, access them [here](https://temp.dufftuff.com/product/stainless-long-tube-headers-efi-compatible-1966-77-bronco/).
Features & Benefits:
- One-piece construction
- Equal length tubes for performance
- Starter access without header removal
- 16-gauge tubing for flow efficiency
- 3/8″ thick flange for durability
- Premium gaskets and hardware included
- Available in Black Cerakote for enhanced thermal resistance
Technical Specs:
- Engine compatibility: 289, 302/5.0, 351W/5.8
- Tube diameter: 1 1/2″
- Collector diameter: 2 1/2″
- Max temperature tolerance: 1600° F (ceramic) / 2300° F (Black Cerakote)
- Transmission compatibility: C4, AOD, manual; custom pipes required for NV3550/AX15
Resources:
Thomas Butman –
I really appreciate the courtesy call about shipping. Everyone was great to work with. Your descriptions of the products are perfect. Thank you!
Brian Seager –
The headers look good and arrived in good condition. Installation wasnt to complicated. However the drop bracket on the equalizer bar hit the headers so i had to modify my clutch linkage. I am running a 351W and 3-speed manual transmission.
Clifford Harrelson –
A great added look and upgrade that’s so beneficial. Easy install and built to last looks make these a “must have”. I added these along with a Duff’s dual exhaust system and just couldn’t be happier with the install and added performance. Highly recommend this.
Trent Bonnett –
An amazing upgrade for Bronco. Great fit and amazing quality.