The Automann MPB452 is a premium leaf spring shackle kit engineered for Peterbilt heavy-duty trucks (e.g., Model 379, COE 1987–1997). This OE-quality kit includes bushings, side bars, high-strength bolts, and grease fittings—designed to restore proper spring travel, reduce noise, and ensure smooth suspension articulation.
Side Bars: ≈ 6 in length (eBay listing: “2‑M1500 Sidebar (6 inch)” )
Bushings: MPB60 (2 included) – OEM replacement for Automann and Peterbilt spring eye bushings
Spring Pins: B1420‑75 (2 units) – Heavy-duty pins with locknuts and bolts
Bolts & Nuts: 4 Grade‑5 cap screws (F120300 GR5) and 4 SLN813 lock nuts
Grease Fittings: 2 G1803 zerks included for proper lubrication
This kit matches or is equivalent to multiple OEM and aftermarket part numbers:
| Brand | Part Number(s) |
|---|---|
| Automann | MPB452, M1500, M5308 |
| Dayton | 330‑191 (Kit), 330‑186 (Sidebar) |
| ATRO | SK75‑10200 (bushing kit with bushings, pins, sidebars) |
| Flagg | E627‑75 (sidebars), B1420‑75 (spring pins), PB103 (kit) |
| Peterbilt | 02‑01783, 02‑01784, 02‑01805 (COE 4″ cast eyes ‘87–’97) |
Also cross-linked to other items: Freightliner ABP/N3271471, UCF Impex SPB‑103, Network PE15D
Complete Suspension Renewal: All parts in one kit—makes resetting spring geometry and eliminating noise easy and efficient.
OE-Quality Fitment: Exactly matches OEM dimensions, ensuring proper load distribution and travel.
Enhanced Durability: Heavy-duty steel pins and bars joined with top-grade bushings.
Easy Grease Access: Guaranteed longevity with grease fitting integration.
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