1973-1991 C20/C30 3 inch Front / 4 inch Rear Complete Lowering Kit (Shocks Included)
$1,140.62
Drop Front 3″ | Rear Lowered by 4″ | Includes Premium Shocks
This complete Chevy C20 and Chevy C30 lowering kit delivers both style and comfort with easy installation, premium components, and superior durability for a smooth ride and enhanced handling.
Transform your 1973-1991 C20/C30 into a sleek, lowered machine with this 3-inch front and 4-inch rear lowering kit. Complete with high-quality shocks, this kit provides superior handling and a smoother ride.
- Front 3″ drop for perfect stance
- Rear 4″ drop for balance and style
- Loop SuperShock (1409) and Loop SuperShock (1800)
- Ball Joint 6129
- Bushing kit BK2655L
- Description
- Additional information
- Lower Control Arm Instructions
- Rear Hanger & Shackle Instructions
- Replacement Parts
Description
Why Buy from DJM Suspension
High-Quality Components
Our lowering kits are crafted with precision and built to last, ensuring your vehicle gets the best performance with minimal maintenance.
Easy Installation
Designed for a hassle-free installation with included instructions, you can enjoy the improved ride and appearance without professional help.
Improved Ride Comfort
The included shocks improve handling, providing a smooth and controlled driving experience while maintaining the lowered look.
About DJM Suspension
DJM Suspension, a family-owned and operated American manufacturer, has been leading the lowering industry since the early 1970s. With a passion for aftermarket automotive products, including this 1985 C20 lowering kit, we provide top-tier performance and style for your vehicle.
Frequently Asked Questions
Upgrade Your Truck’s Suspension
Get your truck the look and ride it deserves with DJM Suspension’s 1985 C20 lowering kit, which fits perfectly to any C20/C30 model between 1973 and 1991. You’ll enjoy a smooth ride, better handling, and a more aggressive stance. Shop now and take your ride to the next level!
Additional information
1973 – 1991 C20 / C30 Front 3″ lower control arms (8 lug trucks only)
| Weight | 50 lbs |
|---|
1973–1991 C20/C30 (8 LUG) 4 inch Rear Lowering Leaf Spring Hanger and Shackle Kit
| Weight | 20 lbs |
|---|
14.5″ Loop / Loop SuperShock (1409)
| Weight | 3 lbs |
|---|
18.5″ Loop / Loop SuperShock (1800)
| Weight | 3 lbs |
|---|
Download Lower Control Arms Instructions (PDF)
1973–1991 Chevy C30 Pickup
Lower Control Arms
Important — Read Before Installing
Hardware Parts List
- 1 Left Lower Control Arm
- 4 Pivot Bushings (Installed)
- 2 Sleeves (Installed)
- 1 Ball Joint (Installed, #6129)
- 1 DJM Cross Shaft (Installed)
- 1 Tube Loctite
- 2 Grease Fitting & Cotter Pin Bags
- 4 Grease Fittings (pivot bushings)
- 1 Right Lower Control Arm
- 4 Pivot Bushings (Installed)
- 2 Sleeves (Installed)
- 1 Ball Joint (Installed, #6129)
- 1 DJM Cross Shaft (Installed)
Installation Procedure
On the bottom of the pivot tubes are threaded holes for the grease fitting. Using a 1/8" drill bit, drill through the bushing and sleeve to create a path for grease. Remove any burrs on the inner sleeves, then carefully thread in the grease fitting.
Line up the pins for the cross shaft and install using the factory u-bolts. Install with the factory coil spring only.
Before installing the sway bar bracket to the control arm, loosen the bolts that hold the D-bushings to the frame under the bumper. Raise the lower control arm to ride height, install the sway bar brackets, then tighten.
Apply grease to all grease fittings on both arms. Review all procedures and confirm that all parts are tight and correctly installed.
Replace wheels and torque lug nuts. Verify the tires rotate in both directions without making contact with any component.
Turn the steering wheel to center. By sighting down the tires and truck you can get the toe fairly close. Adjustment is made with the tie rod ends — loosen the nuts at the rack and turn the tie rod ends until the tires are in a straight line from front to rear. Your alignment shop will finalize this. Do not forget to tighten the nuts.
With the vehicle on the ground, measure the front ride height and record it on the installation helper. Your measurements should be approximately 3" less than the before-installation measurement.
After Test Drive
Download Lower Control Arms Instructions (PDF)
Download Rear Hanger & Shackle Instructions (PDF)
1973–1991 Chevy C30
Rear Hangers & Shackles
Important — Read Before Installing
Hardware Parts List
- 2 Spring Eye Hangers
- 2 Shackles w/ Bushings (SH1012-2)
- 8 7/16" x 14 Nylock Nuts
- 8 7/16" x 14 x 1-1/4" Bolts
- 16 7/16" Flat Washers
Installation Procedure
Working one side at a time, remove the u-bolts holding the springs to the axle. To keep the spring pack together while removing the overload, use two large C-clamps placed close to the center bolt on the leaf spring and tighten. Remove the center bolt nut. Slowly loosen the C-clamps and remove the upper overload spring. Clamp springs back together, reinstall the center bolt and tighten. Remove C-clamps.
The spring center bolt must be seated in the hole on top of the axle — verify this before tightening u-bolts. When the center bolt is in place, install the u-bolts, bottom plate, and nuts. Tighten u-bolts.
Remove the two striker pad brackets attached to the frame.
Loosen and remove the two shackle bolts and remove the stock shackle. Test fit the new shackle and check for interference on the bottom of the bed. On some trucks a square bed brace will be in the way of the shackle — cut a notch in the brace wide enough for the bolts.
Remove the bolt holding the front of the leaf spring to the front spring hanger. Remove the rivets holding the spring hanger to the frame using an air chisel or by drilling out the rivets.
Mount the new DJM spring hanger in the original holes on the frame using the hardware provided. The gas tank may need to be moved to gain access to bolts on the driver side. Raise the axle so the front of the springs can be located in the new hanger. With factory bolts, attach the spring to the hanger and install nuts — do not tighten yet. (Some may find it easier to attach the spring to the hanger before bolting the hanger to the frame.) See Fig. #1 for typical hanger installation.
Apply grease to the bushings and inside sleeves. Attach the new shackle on the frame mount and bolt in place with factory bolts (Fig. #2). Shackle installs with bushings down and open side forward. The hole farthest from the bushing will lower the truck more than the closer hole. Raise the rear axle high enough to align the spring eye and shackle. Insert the remaining bolt and install nuts.
Install rear wheels and torque lug nuts. Remove the jack stand and floor jack. Check the height of the rear — you can adjust the height by moving the spring to the other hole in the shackle. When satisfied with the height, install new shocks (DJM #1800) and tighten all bolts.
After Test Drive
Download Rear Hanger & Shackle Instructions (PDF)