Engines and Components› Oiling Systems

Boundary

BP I4 Oil Pump Assembly, 72 PSI

$469.00

SKU: bouBP-S2

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Overview

The Boundary 91.5-05 Ford/Mazda BP (All Types) I4 Oil Pump Assembly is a high-flow oil pump designed for specific engine applications. This assembly includes two shims and is rated for 72 PSI, without a crank seal.
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The Boundary 91.5-05 Ford/Mazda BP (All Types) I4 Oil Pump Assembly is engineered for enhanced performance in specific Ford and Mazda BP engines. This high-flow oil pump assembly comes with two shims and is rated to deliver 72 PSI, ensuring adequate oil pressure for demanding applications. Fitment information indicates this oil pump is designed for Mazda Miata models from 1991.5 to 2005. Additionally, it is compatible with Ford/Mazda BP (All Types) I4 engines. Some sources also list compatibility for 1990-1991 Mazda Miata models and specifically mention the 1.6L BP engine for 1989-1991.5 model years (though this may refer to a different variant or require manual verification). Note that some listings mention that customers will be responsible for providing their own OEM crank seal before installation. It is advisable to verify fitment manually for your specific vehicle and trim.

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.

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Specifications

BrandBoundary
Part NumberbouBP-S2
CategoryEngines and Components
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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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Shipping

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