Overview
The Pro Comp 58402 is a 4 inch rear lift block kit for leaf spring vehicles from Pro Comp Suspension. The kit gives the rear a 4 inch lift using two cast iron riser blocks that sit between the axle and the leaf springs.
Taper is intended to help driveshaft angles hold once the rear sits higher. Fit depends on your axle and spring pack, so measure both before buying.
Key features
- 4 inch rear lift height
- Tapered cast iron riser blocks
- Four U-bolts for mounting the blocks
- Eight heavy duty flat washers and eight hi-nuts in the box
Checking the spring pack
A leaf spring rear lift works by raising the axle relative to the frame, so the spring pack sits at a new angle. Check that the springs still have arch and that the pack has no broken or shifted leaves. Blocks cannot correct a sagging spring, so worn springs should be serviced or replaced first.
Once the lift is in, watch U-bolt clearance against the axle tube and brake lines, and check that the shocks still reach their full travel without binding. Overextended shocks can be a sign that a longer set is needed, which is worth discussing with a shop that handles your vehicle.
- Inspect spring leaves and center bolt
- Confirm shock travel after install
- Check U-bolt clearance at full droop
Specifications
| Brand | Pro Comp Suspension |
|---|---|
| Part number | 58402 |
| UPC | 614901111316 |
| Type | Rear block with U-bolt kit |
| Lift height | 4 in |
| Block material | Cast iron |
| Block shape | Tapered |
| Hardware | 4 U-bolts, 8 heavy duty flat washers, 8 hi-nuts |
Vehicle fitment
Fit is set by axle and spring type, so measure both before ordering.
Confirm your vehicle’s year, model and trim before ordering.
What’s included
Two cast iron riser blocks, four U-bolts, eight heavy duty flat washers and eight hi-nuts, packed in a box.
