Kenworth W900L 2018+ DPF & Battery Step Box Covers – Select Cab Style & Model Year

Description

Which Step Box Cover Do I Need for My 589?

If your Peterbilt 589 has the battery box on the driver side and it’s a weed burner (exhaust dumps under the truck) —
✅ You can use the same box cover on either side.

But if your truck is a DPF-style with the exhaust can (DPF) on the side,
🚫 You need the DPF-specific box cover for that side — the battery box one won’t fit.

Quick Rule
👉 Weed burner = same cover both sides
👉 DPF on side = use DPF box cover on passenger side

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