{"product_id":"boundary-91-05-mazda-miata-1-6l-1-8l-martenwear-high-flow-oil-pump-assembly","title":"Boundary Stage 2 MartenWear High Flow Oil Pump, 1991.5–2005 Miata | BP-S2-M","description":"\u003ch2\u003eBoundary Stage 2 MartenWear High Flow Oil Pump for Mazda Miata\u003c\/h2\u003e\n\u003cdiv style=\"border-left: 4px solid #333; padding: 10px 16px; margin-bottom: 16px; background: #f9f9f9;\"\u003e\n\u003cstrong\u003eCrank configuration is critical:\u003c\/strong\u003e Boundary lists the BP-S2 pump family for \u003cstrong\u003e1991.5–2005 Miata\u003c\/strong\u003e. Early 1.6L small-\/short-nose crank engines require the separate SNC version, not this BP-S2-M listing. Confirm the installed engine and crank configuration, especially on transition-year cars or engine swaps. \u003cstrong\u003eAn OEM crank seal must be supplied separately.\u003c\/strong\u003e Professional engine-builder installation and oil-system priming are recommended.\u003c\/div\u003e\n\u003cp\u003eThe Boundary BP-S2-M is a Stage 2 high-flow assembled oil pump with MartenWear-treated billet gears for the listed Mazda Miata application. A deeper machined gear pocket accommodates larger gears, increasing pump displacement compared with the standard configuration. Ships fast across Canada and the US.\u003c\/p\u003e\n\u003ch3\u003eStage 2 Design\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDeeper machined pump pocket with larger gears.\u003c\/li\u003e\n\u003cli\u003eBillet gear set with a mirror-finished surface.\u003c\/li\u003e\n\u003cli\u003eMartenWear treatment on the billet gear wear surfaces.\u003c\/li\u003e\n\u003cli\u003eStage 2 design described by Boundary as compatible with Miata VVT applications.\u003c\/li\u003e\n\u003cli\u003eSupplied as an assembled pump, rather than a gear-only kit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMartenWear Treatment\u003c\/h3\u003e\n\u003cp\u003eBoundary describes MartenWear as a second-stage heat treatment that hardens the exterior wear surfaces of its billet steel components while retaining the core properties. It is intended to improve wear resistance. Manufacturer bench-test speeds are not a safe engine RPM limit or a guarantee against oil starvation, debris damage or pump failure.\u003c\/p\u003e\n\u003ch3\u003eAssembly Preparation\u003c\/h3\u003e\n\u003cp\u003eBoundary's assembled-pump process includes disassembly, ultrasonic cleaning, inspection and hand deburring. The published process also specifies stainless Torx fasteners, controlled fastener torque, thread-locking compound, sealant at critical areas, assembly lubricant and blueprinting with a specification sheet.\u003c\/p\u003e\n\u003ch3\u003eListed Fitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMazda Miata, 1991.5–2005, with the compatible later crank\/pump configuration.\u003c\/li\u003e\n\u003cli\u003eListed 1.6L and 1.8L applications must be matched to the actual engine and crank, not just vehicle registration year.\u003c\/li\u003e\n\u003cli\u003eEarly small-\/short-nose crank engines require a separate SNC pump.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor VVT engines or a swapped engine, verify the pump and oil-system configuration with Boundary or the engine builder before purchase. No blanket Escort, Protege or other Mazda\/Ford fitment is promised by this listing.\u003c\/p\u003e\n\u003ch3\u003eSpecifications and Package Scope\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Boundary\u003c\/li\u003e\n\u003cli\u003ePart number: BP-S2-M\u003c\/li\u003e\n\u003cli\u003eStage: 2 \/ high flow\u003c\/li\u003e\n\u003cli\u003eProduct: Assembled engine oil pump\u003c\/li\u003e\n\u003cli\u003eGear treatment: MartenWear\u003c\/li\u003e\n\u003cli\u003eCrank seal: OEM seal required separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDo not assume an optional billet backplate, spare gaskets, pickup tube or additional engine service parts are included. Confirm the supplied pump configuration and specification sheet before installation.\u003c\/p\u003e\n\u003ch3\u003ePressure and Installation Notes\u003c\/h3\u003e\n\u003cp\u003eBoundary's current pump page offers multiple relief-valve shim configurations. Confirm the supplied setting for BP-S2-M rather than assuming a fixed pressure. Actual oil pressure depends on oil temperature and viscosity, bearing clearances, engine speed and the complete oiling system.\u003c\/p\u003e\n\u003cp\u003eFollow the current pump instructions and factory service procedure. Check crank engagement, pump and pickup compatibility, sealing surfaces and engine clearances. Prime the system as directed, verify oil pressure before placing the engine under load, and inspect for leaks. A high-flow pump does not by itself correct pickup starvation, excessive bearing clearance or an unsuitable sump arrangement.\u003c\/p\u003e\n\u003cp\u003eShips fast across Canada and the US.\u003c\/p\u003e","brand":"Boundary","offers":[{"title":"Default Title","offer_id":51675161100455,"sku":"BOUBP-S2-M","price":579.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/8344\/1063\/files\/8202bcf29676b858be3c6227ec9680a5L.png?v=1793140857","url":"https:\/\/www.straightsiximports.com\/en-us\/products\/boundary-91-05-mazda-miata-1-6l-1-8l-martenwear-high-flow-oil-pump-assembly","provider":"Straight Six Imports","version":"1.0","type":"link"}