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Speedway Motors Ladder Bar Rear Suspension Kit, 38 Inch
Speedway Motors Ladder Bar Rear Suspension Kit, 38 Inch

Speedway Motors Ladder Bar Rear Suspension Kit, 38 Inch

Universal Fit, Solid Axle Rear Suspension Type, Radius Rod Trailing Arm Style, Shocks Included

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Speedway Motors Ladder Bar Rear Suspension Kit, 38 Inch
Speedway Motors Ladder Bar Rear Suspension Kit, 38 Inch
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Part # 91602054
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QA1 10 Inch Coil-Over Spring, 2-1/2 Inch I.D.
QA1 10 Inch Coil-Over Spring, 2-1/2 Inch I.D.
Quantity: 2
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Rear Suspension Type:
Solid Axle
Trailing Arm Style:
Radius Rod
Spring Type:
Shocks Included:
Axle Housing Included:
Lower Trailing Arms Included:
Upper Trailing Arms Included:
Trailing Arm Mount Braces Included:
Hardware Included:
Sold in Quantity:
Welding Required:


Give your street rod a complete rear suspension with this single universal kit from Speedway Motors.

Kit Includes:

  • (1) Rear Ladder Bar Set - 38" Long
  • (1) 4-Bar Rear Axle Bracket Set
  • (2) Carbon Steel Heim Joints - 3/4"-16 RH
  • (2) Thin Steel Jam Nuts - 3/4"-16 RH
  • (4) Stainless 4-Bar Rod Ends - 5/8"-18 RH, 11 Degree
  • (4) Stainless Jam Nuts - 5/8"-18 RH NF
  • (2) Coilover Shock Mount Bolts - 4-1/2", Polished
  • (1) Instruction Sheet
  • (1) Weld-On Rear Panhard Bar/Track Rod Kit
  • (2) QA1 Street Rod Shocks
  • (2) QA1 10" Coilover Spring - 2-1/2" I.D.
  • (2) Coilover Mounting Kit
  • (1) Chassis Tab Mounting Kit
  • (1) Shock Mounting Hardware Kit

38 Inch Ladder Bars

The front (chassis/frame end) of these ladder bars make use of 3/4" RH threads and the rears (axle end) make use of 5/8" RH threads. 

  • 38" long

916-45159 Instructions (pdf)

Four-Bar Rear Axle Brackets

Exclusive sandwich-style brackets give greater bar support and incorporate a multi-position lower coil-over mount. Weld to 3" O.D. axle tubes only.

  • Lower coil-over shock mount stud not included
  • Shock mount stud hole ID - 1/2"

Steel RH Male Heim Joints

Precision steel rod ends provide greater strength than our "standard" rod ends. They have close tolerance and have a 3 piece medium duty rod end. Carbon steel body, 5210 precision ground ball and feature a Teflon Kevlar race. Self lubrication teflon liner to seal out dirt and debris. Shank and hole are the same size.

  • Spherical Bearing rod end
  • 3/4"-16 thread pitch
  • RH Male Threads
  • Steel Construction
  • Natural finish

To ease assembly, be sure to run a tap or die through the threads on chrome plated fasteners and apply an anti-seize compound to prevent galling of the threads.

Standard Heim Sizes Chart (GIF)

Thin Steel Jam Nuts

Plain steel fine thread jam nut. Special half thickness nuts for securing steering heims to a panel or flange.

  • .41" thick
  • Hex wrench type
  • 1-1/8" wrench size
  • 3/4"-16 thread pitch
  • RH Female thread type
  • Steel construction
  • Zinc finish

Stainless Four-Bar Rod Ends

Don't settle for a weak 4-bar end made out of a piece of tubing welded to a bolt. These Speedway rod ends are made from fully polished investment cast stainless steel for superior strength and durability. All rod ends feature a 5/8"-18 RH threaded shank and the nylon bushing has a steel sleeve that accepts a 1/2" bolt.

  • 11¬į Shank
    • Mounting eye is offset 11¬į from perpendicular to threaded shank (with the bushing side down, the stud will be angled up at a 11¬į angle)
    • 5/8"-18 RH threads
  • Overall width: 1.370"
  • Rod end width: 1.050"
  • Rod end¬†I.D.: 1.125"
  • Steel sleeve O.D.: 0.750"
  • Steel¬†sleeve I.D.:¬†0.500"
  • Threaded shaft¬†length: 1-7/8"

Stainless Jam Nuts

If you've got spherical rod ends on your vehicle, you'll probably need jam nuts. You might also need them for tie-rod ends or other types of fittings and connectors. Our jam nuts are made from premium stainless steel and they're available with right hand threads.

These stainless steel fine thread jam nuts are for use with rod ends, heim joints, and clevis.

  • 5/8 Inch-18 RH NF Fine Thread

Coilover Shock Mount Bolts

Speedway sells the ONLY fully engineered shock mount. The 5/8" forged button head bolt looks good while offering maximum support.  The 1-3/4" x 1-3/4" billet aluminum support spacer has internal threads. This allows you to properly support this shock without crushing the bushing like others do, which leads to shock failures. There's a reason major chassis builders use this mount.

  • Billet aluminum
  • 4-1/2" from base of head to end of threads
  • 1-1/4" shock mount base
  • Safely mounts to brackets 1/2" thick
  • Includes required washers and nylon lock nut

916-36010 Instructions (PDF)

  1. Coil-Over Mounting Guide (GIF)
  2. Uses a 1/2" Allen head wrench for holding it while tightening.

Weld-On Rear Panhard Bar/Track Rod Kit

Use on almost any street rod. Required for coil spring and coil-over rear suspensions. Complete kit includes rod, brackets and 5/8" hardware. Ready to install.

  • 25.5" length
  • 5/8" hardware

916-49022 Instructions (PDF)

QA1 Street Rod Shocks

QA1 Street Rod Series shock feature beautifully chrome plated 1.63" OD steel bodies. These three-way adjustable, gas pressurized and radial tuned shocks provide an excellent ride. Shock accepts 7/16" or 5/8" bolt for top bushing and 5/8" bolt in bottom bushing.

  1. This shock is three-way adjustable. Choose between a soft, medium, or firm ride quality. To adjust the shock, fully compress the shock and twist the shock shaft clockwise. Each "click" indicates a different firmess has been set.
  2. Coil-Over Mounting Guide (Link)

QA1 10 Inch Coilover Springs

QA1 coil-over racing springs are guaranteed to remain within 2% of rate and length - forever! Springs are coil wound of chrome-silicon wire, the strongest spring steel known. This gives more travel and lighter weight. Heat treated and chrome plated. 

  • 10 Inch height
  • 2-1/2 Inch inside diameter
  • Choose your desired rate

QA1 Spring Rate Chart

Coil-Over Mounting Guide (GIF)

Coilover Mounting Kit

For coil over shocks with 1.63" O.D. body. Use with 2-1/2" I.D. springs.

  • Overall length of threaded sleeve is 4"
  • Length of threaded area is 3-3/8"
  • O.D. is nearly 2"
  • I.D. is nearly 1-11/16"

255-1951 Instructions (PDF)

Replacement snap ring 255-1930

Replacement safety clip 582-525

Chassis Mounting Tabs

These weld-on chassis tabs are great for installing radius rods and ladder bar suspension components.  They are 1/4" thick with a 1/2" mounting hole diameter.

  • Weld-on chassis tabs
  • 1/4" thick
  • 1/2" hole
  • Set of 8
Some parts are not legal for use in California or other states with similar laws/regulations

Related Products

What's In The Kit

Each kit from Speedway Motors is carefully packaged and delivered right to your door. Below is a list of all the items you should expect to receive when you order this kit. Some of these items may also be available for sale individually if you're here looking for replacement parts.
  • 38 Inch Rear Ladder Bars
    Qty x 1
  • Speedway Four-Bar Rear Axle Brackets
    Qty x 1
  • Precision Carbon Steel RH Male Heim Joint Rod Ends, 3/4 Inch
    Qty x 2
  • Thin Steel Jam Nuts, 3/4-16 RH
    Qty x 2
  • Speedway Stainless 4-Bar Rod End, 5/8-18 RH Thread, 11 Degree Shank
    Qty x 4
  • Stainless Jam Nut, 5/8 Inch-18 RH NF Fine Thread
    Qty x 4
  • Speedway Coilover Shock Mount Bolt w/ Polished Support Collar, 4-1/2
    Qty x 2
  • Instruction for Ladder Bars
    Qty x 1
  • Speedway Universal Weld-On Rear Panhard Bar Track Rod Kit
    Qty x 1
  • QA1 SR2254P Street Rod Shock
    Qty x 2
  • QA1 10 Inch Coil-Over Spring, 2-1/2 Inch I.D.
    Qty x 2
  • Coilover Mounting Kit, 1.63 Inch Body
    Qty x 2
  • Chassis Weld Tabs for Suspension Install, 1/2 Inch Hole, Set of 8
    Qty x 1
  • Shock Mounting Bolts and Nuts
    Qty x 1

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