Telephone _ James Duff, Inc.

865.938.6696

M-F 10-6 EST

You are here: Home > Search for "radius arms"
We found 43 results matching your criteria.
Find by Category
2 Big 1978-1979 (13)
Bronco II 1984-1990 (15)
Builder Parts (6)
Bushings (11)
Cherry Bomb (1)
Duffy's Original (4)
Early Bronco 1966-1977 (30)
Engine (3)
Flowmaster (1)
Free Shipping (1)
Full Size 1980-1996 (10)
Holiday Deals (2)
New Products (5)
Ranger 1983-97 (14)
Sale (1)
Suspension (28)
Find by Pricing
Below 39 (7)
39 to 109.99 (9)
110 to 668.99 (8)
669 and Above (19)
Sort By:
Page of 5
Early Ford Bronco T-Rex Radius Arms Replacement Stock Length Stage 2 Duff James Suspension
T-Rex Stock Length Radius Arms, 1966-79 Bronco, 1967-79 F150 4WD
Our Price: $719.95

Want to run a wide tire but don’t want them to rub on your stock radius arms?

Our new T-Rex radius arms are a stock length version of our heavy duty arms with a built in offset for additional tire clearance but unlike the extended arms, these are a direct bolt in to your existing frame brackets. They use stock style polyurethane bushings, no welding of new brackets is necessary. Yes, 100% bolt on! Why would we do such a thing? Many Bronco owners want an arm that can clear a larger tire when turning without having to grind, drill or weld on their frame. Work for stock up to 3.5” of lift with 4.25° of caster built in. Shock mounting is different than our extended arms, these utilize a single shock mount located on top of the arm for a tighter turning radius arm, similar to a stock arm. Come powder coated in Signature Duff Blue or upgrade to new Midnight Black Metallic. Includes all new hardware.

NOTE: Factory sway bars from the Early Bronco, Big Bronco (1978-79), and F-Series trucks must be removed to use our T-Rex Radius Arms.
Tubular Extended Long Travel Radius Arms, 1978-79 Fullsize Ford Big Bronco & 1967-79 Trucks F150
Tubular Extended Long Travel Radius Arms, 1978-79 Bronco, 1967-79 Trucks, SAS B2/Ranger/Ex
Our Price: $789.00

We've been selling our proven Long Travel Extended Radius Arm design since 2001 with a track record of quality production for 17 years!

•Fabricated out of 2" diameter, 5/16" (.313”) heavy wall DOM. For strength and safety we designed a separate cast iron head unit to mount to the C-wedges on the axle with your original C-cap or our new ones sold separately.

•10 3/4” longer than stock Early Bronco arms— Moving the pivot point farther back vastly improves suspension travel & articulation. Improves handling & control for on road driving.

•Fabricated from all new materials— no core charges, no cutting or welding to 30-40 year old cast arms.

•Built in caster means better alignment and handling. The arm itself is offset to clear larger tires and maximize articulation. Not just for hard core use, they make a great improvement in street ride

•A tight to the frame rear mount holds the arm with a high quality 1” bore Teflon lined and lubricated Rod End, keeping it closer to the frame for improved ground clearance and breakover angle.

Tons of travel, a tighter turning radius, better ground clearance and improved handling all in one product! Includes arms, head units, rod ends, frame mounts, bushings and all necessary mounting hardware. Bolt on installation, but some welding recommended. Requires at least a 3” suspension lift. C-bushings are sold separately due to vehicle variations and lift height.

Built in lower shock mounts for use with stock shock mounting position or our Stage 2 Hoops and our Long Travel Shocks for 15" of travel. Best results are achieved when these arms are used in conjunction with Duff suspension components. Signature Duff Blue powder coated for durability or upgrade to new Midnight Black Metallic powder coat for $40. Requires reuse of original C-caps (we also have separately for Solid Axle swaps.) Includes arms, head units, rod ends, bushings and all necessary mounting hardware. All new parts, no core necessary.

A kit just for you C-channeled frame guys to install our Long Travel Radius Arms on the C-channeled framed Broncos and trucks. This kit includes arms, cross member brackets, specially designed frame brackets with a backside reinforcement and riser brackets for the brake lines. The arms are the same proven design that we've been selling for years! Combine with our Cast C-Wedges, C-Caps and Spacers to swap in a new Dana 44 or Dana 60! Must have at least a 3.5 lift.

C-bushings are sold separately due to vehicle variations and lift height.

Note that a High Pinion 44 or 60 needs about 8° caster, a 5-6" lift on this axle will utilize the 4°C-Bushings #6004 and anything more, the 7°Bushings #6007. These numbers can be played with on all axles depending on what angle the C-wedges are welded onto the axle.

Because the shopping cart cannot calculate shipping properly on these, we will contact you to authorize with shipping charges after you place your order. Please note these are heavy duty, they come in two packages totaling 121lbs!



Want to know what's involved for installation? Download instructions here
Tubular Extended Long Travel Radius Arms 1966-77 Classic Early Ford Bronco Suspension
Stage 3 Tubular Extended Radius Arms 1966-77 Bronco
Our Price: $769.00

We've been selling our proven Early Bronco Long Travel Extended Radius Arm design since 2001 with a track record of quality production for almost 18 years!

•Fabricated out of 2" diameter, 5/16" (.313”) heavy wall DOM tube. For strength and safety, we designed a separate cast iron head unit to mount to the C-wedges on the axle using your original C-cap or our new ones sold separately. (#5341)

•10 3/4” longer than stock— Moving the pivot point back on the frame greatly improves suspension travel and increases articulation. Handling and steering control for on road driving are dramatically improved.

•Fabricated from all new materials— no core charges, no cutting or welding to 40-50 year old cast arms.

•Built in caster means better alignment and handling. The arm itself is offset to clear larger tires and maximize articulation. Not just for hard core use, they make a great improvement in street ride

•A tight-to-the-frame rear bracket mounts the arm. We use a high quality 1” bore Teflon-lined and lubricated rod end, keeping it closer to the frame for improved ground clearance and break-over angle.

Tons of travel, a tighter turning radius, better ground clearance and improved handling all in one product! Includes arms, head units, rod ends, frame mounts, bushings and all necessary mounting hardware. Bolt on installation, but some welding recommended. Requires at least a 3” suspension lift for best off road performance. C-bushings are sold separately due to vehicle variations and lift height. Will not work with factory sway bars.

Built in lower shock mounts for use with stock shock mounting position or our Stage 2 Hoops and our Long Travel Shocks for 15" of travel. Best results are achieved when these arms are used in conjunction with Duff suspension components. Signature Duff Blue powder coated for durability or our new Midnight Black Metallic Powder coat for only $40 more. Reuse your original c-caps or purchase a newly cast set from us (#5341). The kit includes extended radius arms, new cast head units, head unit bushings and sleeves, rod ends, and all necessary mounting hardware. All new parts so there is no core necessary.

Because the shopping cart cannot calculate shipping on these, we will contact you to authorize with shipping charges after you place your order. Please note these are heavy duty. Even though the ship UPS Ground, they come in two boxes totaling 111lbs!

NOTE: Factory sway bars must be removed to use our Extended Travel Radius Arms.

Want to know what's involved for installation?
C Bushings 7° Lift 1966-77 Classic Early Ford Bronco Dana 30 44
7° C-Bushings, Set of 4, 1966-79 Bronco, F150 and Solid Axle Swaps
Our Price: $39.95

With positive caster adjustment built in, our C bushings will help recover the steering control lost from lift kits and wear and tear. High quality Black polyurethane bushings. Fit 1966-79 Broncos, F100 & F150s The only way to be certain which ones you need is with a front end alignment but our experience has lead us to the following general recommendations:

1966-77 Bronco with stock arms:
#6002 2° C Bushings, stock height
#6004 4° C Bushings, 1 - 2 1/2” lift
#6007 7° C Bushings, 3”+ lift

1966-77 Bronco with our Long Travel or T-rex Radius Arms with 4.25° caster built in to the arms:
3.5” lift: #6004 4° C Bushings
5.5" lift: #6007 7° C Bushings

78-79 Bronco/F150 with our #5351 Long Travel Radius Arms or T-rex arms with 4.25° built in:
2-4” lift: #6002 2°C Bushings
5-6” lift: #6004 4°C Bushings
6”+ lift: #6007 7° C Bushings

80-96 Bronco SAS:
Same as 78-79 Bronco but they will vary depending on what degree the C-Wedges are welded onto the housing.

Bronco II & 83-97 Ranger Dana 44 SAS with our Long Travel or T-rex Radius Arms:
3-4” lift: #6004 4°C Bushings
5”+ lift: #6007 7° C Bushings
C- Bushings 2° Stock Height Dana 30 Dana 44 1966-77 Early Classic Ford Bronco
2° C-Bushing Kit, Set of 4, 1966-79 Bronco, F150 and Solid Axle Swaps
Our Price: $39.95

With positive caster adjustment built in, our C bushings will help recover the steering control lost from lift kits and wear and tear. High quality Blue polyurethane bushings. Fit 66-79 Broncos, F100 & F150s The best way to determine which ones you need is with a front end alignment but our experience has lead us to the following general applications:

1966-77 Bronco with stock arms:
#6002 2° C Bushings, stock height
#6004 4° C Bushings, 1 - 2 1/2” lift
#6007 7° C Bushings, 3”+ lift

1966-77 Bronco with our Long Travel Radius Arms with 4.25° caster built in to the arms:
3.5” lift: #6004 4° C Bushings
5.5" lift: #6007 7° C Bushings

78-79 Bronco/F150 with our #5351 Long Travel Radius Arms with 4.25° built in:
2-4” lift: #6002 2°C Bushings
5-6” lift: #6004 4°C Bushings
6”+ lift: #6007 7° C Bushings

80-96 Bronco SAS:
Same as 78-79 Bronco but they will vary depending on what degree the C-Wedges are welded onto the housing.

Bronco II & 83-97 Ranger Dana 44 SAS with our Long Travel Radius Arms:
3-4” lift: #6004 4°C Bushings
5”+ lift: #6007 7° C Bushings
C- Bushings 4° 1"-2 1/2" Lift (4) Dana 30 Dana 44 1966-77 Classic Early Ford Bronco
4° C-Bushings, Set of 4, 1966-79 Bronco, F150 and Solid Axle Swaps
Our Price: $39.95

With 4° of positive caster adjustment built in, our C bushings will help recover the steering control lost from lift kits and wear and tear. High quality Blue polyurethane bushings. Fit 66-79 Broncos, F100 & F150s The best way to determine which ones you need is with a front end alignment but our experience has lead us to the following general applications:

1966-77 Bronco with stock arms:
#6002 2° C Bushings, stock height
#6004 4° C Bushings, 1 - 2 1/2” lift
#6007 7° C Bushings, 3”+ lift

1966-77 Bronco with our Long Travel Radius Arms with 4.25° caster built in to the arms:
3.5” lift: #6004 4° C Bushings
5.5" lift: #6007 7° C Bushings

78-79 Bronco/F150 with our #5351 Long Travel Radius Arms with 4.25° built in:
2-4” lift: #6002 2°C Bushings
5-6” lift: #6004 4°C Bushings
6”+ lift: #6007 7° C Bushings

80-96 Bronco SAS:
Same as 78-79 Bronco but they will vary depending on what degree the C-Wedges are welded onto the housing.

Bronco II & 83-97 Ranger Dana 44 SAS with our Long Travel Radius Arms:
3-4” lift: #6004 4°C Bushings
5”+ lift: #6007 7° C Bushings
1983-97 4WD 4x4 Standard Cab Ford Ranger 5-6" Stage 3 Suspension System Lift Kit Radius Arms Leaf Springs
83-97 4WD Std Cab Ranger 5-6" Stage 3 Suspension
Our Price: $2,295.00

Here’s the deal. We worked on our 5 1/2”-6” lifts for several years... but we hadn’t released them because we were unhappy using radius arm drop brackets. So, here they are — available only with our extended radius arms. We feel this is the BEST way to lift a TTB this much for the sake of safety, strength, handling and ground clearance. This means the lifts include: •5-6” Progressive Rate Coil Springs* •New Coil Tower Dual Shock mounts •Rod Ended Extended Radius Arms •HD Tranny Crossmember •Extended Stainless Brake lines •Drop pitman arm (fits PS only) •Axle pivot drop brackets •4 front shocks, 2 rear shocks, 6 shock boots •Urethane coil pads, leveling spacer •U-bolt kit •Leaf Blocks •Complete Replacement Leaf Spring Packs •Spring Eye Bushings •Axle Pivot Bushings

We will contact you with shipping rates.
Ford Bronco II 5-6" Stage 3 Suspension System Lift Kit Radius Arms Leaf Springs
Bronco II 5-6" Stage 3 Suspension Lift
Our Price: $2,395.00

Here’s the deal. We’ve been working on our 5 1/2”-6” lifts for several years... but we hadn’t released them because we were unhappy using radius arm drop brackets. So, here they are finally— available only with our extended radius arms. We feel this is the BEST way to lift a TTB this much for the sake of safety, strength, handling and ground clearance. This means the lifts include: •5-6” Progressive Rate Coil Springs* •New Coil Tower Dual Shock mounts •Rod Ended Extended Radius Arms •HD Tranny Crossmember •Extended Stainless Brake lines •Drop pitman arm (fits PS only) •Axle pivot drop brackets •4 front shocks, 2 rear shocks, 6 shock boots •Urethane coil pads, leveling spacer •Axle Pivot Bushings •U-bolt kit •Complete Replacement Leaf Spring Packs •Spring Eye Bushings

We will contact you with shipping rates.
1983-97 4WD Ford Ranger Supercab Xcab 5-6" Stage 3 Suspension system Lift Kit Radius Arms Leaf Springs
1983-97 4WD Ranger Xcab 5-6" Stage 3 Suspension
Our Price: $2,395.00

Here’s the deal. We’ve been working on our 5 1/2”-6” lifts for several years... but we hadn’t released them because we were unhappy using radius arm drop brackets. So, here they are finally— available only with our extended radius arms. We feel this is the BEST way to lift a TTB this much for the sake of safety, strength, handling and ground clearance. This means the lifts include: •5-6” Progressive Rate Coil Springs* •New Coil Tower Dual Shock mounts •Rod Ended Extended Radius Arms •HD Tranny Crossmember •Extended Stainless Brake lines •Drop pitman arm (fits PS only) •Axle pivot drop brackets •4 front shocks, 2 rear shocks, 6 shock boots •Urethane coil pads, leveling spacer •U-bolt kit •Leaf Blocks, if applicable •Complete Replacement Leaf Spring Packs •Spring Eye Bushings •Axle Pivot Bushings

We will contact you with shipping rates.
System P 5.5 Monster Suspension no body lift Early Classic Ford Bronco System Radius Arms Leaf Springs
System P: 5.5" Monster Suspension, no body lift, 1966-77 Bronco
Our Price: $2,595.00

These systems take our Ultimate and Long Travel Suspension all the way with the addition of our Stage 3 Radius Arms, Extended Length Brake Lines, E-brake cables, a Heavy Duty Bump Stop kit and a Drop Pitman Arm. 5.5” Progressive Rate Coils, 7° 14 piece Bushing Kit, 11 Leaf Springs, Stage 3 Radius Arms, HD Track Bar Drop Bracket, U-bolts, Original Stage 1 Shock Hoops, Stage 1 Rear Shock Mounts, 4-8114 Shocks, 4-8115 Shocks, Shackle Bushings, Brake hoses, E-brake cables, HD Bump stops and a Drop pitman arm.

This kit is for vehicles without a body lift. Shock boots are not included in kit.