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Engines and Components› Oiling Systems
Milodon
BBM Steel Oil Pump Drive Gear
SKU: M01Q 21503
Easy — 1–2 hours
Overview
With an overall length of 8.187 inches and a gear face to end of shaft measurement of 6.625 inches, the 21503 is designed to handle high-rpm applications and heavy racing oils. It is sold individually and requires a compatible Milodon oil pump and oil system for proper function.
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Part #: 21503
Oil Pump Drive Shaft - 8.187 in Long - Steel Gear - Chromoly - Mopar B / RB-Series / 426 Hemi - Each
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | Milodon |
| Part Number | M01Q 21503 |
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
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