{"product_id":"boundary-91-05-mazda-miata-1-6l-1-8l-martenwear-high-flow-oil-pump-assembly","title":"Boundary High-Flow MartenWear Oil Pump for Mazda Miata","description":"\u003ch4\u003eHigh-Flow Oiling for the Correct Long-Nose-Crank Miata Engine\u003c\/h4\u003e\u003cp\u003eBoundary BP-S2-M combines the Stage 2 high-flow pump design with MartenWear-treated billet gears for the mid-1991–2005 Mazda Miata 1.6L\/1.8L with a long-nose crank. The crank configuration matters: early small-nose-crank engines require a different pump.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBP-S2-M uses the Stage 2 deeper-pocket design and larger gears.\u003c\/li\u003e\n\u003cli\u003eMartenWear treatment hardens the billet gear wear surfaces.\u003c\/li\u003e\n\u003cli\u003eManufacturer lists compatibility with the supported VVT application.\u003c\/li\u003e\n\u003cli\u003eAssembled, inspected and supplied with a pump specification sheet.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eEngine \/ Requirements\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e1991 (late production only)–2005\u003c\/td\u003e\n\u003ctd\u003eMazda\u003c\/td\u003e\n\u003ctd\u003eMiata\u003c\/td\u003e\n\u003ctd\u003e1.6L \/ 1.8L; Long-nose crank only. Mid-year 1991 change; confirm the actual crank before ordering. Excludes small\/short-nose crank.\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eMatch BP-S2-M to the actual engine and pump configuration, especially on engine-swapped or modified vehicles.\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eBoundary Racing Pumps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMPN\u003c\/td\u003e\n\u003ctd\u003eBP-S2-M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly\u003c\/td\u003e\n\u003ctd\u003eStage 2 high-flow oil pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGear construction\u003c\/td\u003e\n\u003ctd\u003eBillet steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTreatment\u003c\/td\u003e\n\u003ctd\u003eMartenWear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack plate\u003c\/td\u003e\n\u003ctd\u003eStandard configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eManufacturer lifetime warranty; terms apply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eWhat's Included\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eOne BP-S2-M assembled oil pump.\u003c\/li\u003e\n\u003cli\u003eOEM crank seal must be supplied separately.\u003c\/li\u003e\n\u003cli\u003eOnly the specified assembly; related parts and service consumables are separate.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eAbout Boundary\u003c\/h4\u003e\u003cp\u003eBoundary Racing Pumps develops billet oil-pump gears and assembled pumps in the USA. Its range includes engine-specific pump revisions, high-flow designs and optional MartenWear surface treatment.\u003c\/p\u003e\u003ch4\u003eRelated Parts\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e\n\u003ca href=\"\/products\/boundary-89-05-ford-mazda-bp-all-types-i4-shim-kit-7-14-21-28-35-psi-w-retaining-pin\"\u003eBoundary BP-SH-K pump shim kit\u003c\/a\u003e — optional pressure-adjustment hardware. Match the pump and required pressure with your engine builder; it is not included.\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eFAQ\u003c\/h4\u003e\u003cstrong\u003eWhat is the BP-S2-M?\u003c\/strong\u003e\u003cp\u003eA Stage 2 high-flow assembled oil pump with MartenWear-treated gears for the listed long-nose-crank Miata engines.\u003c\/p\u003e\u003cstrong\u003eWill it fit every 1991 Miata?\u003c\/strong\u003e\u003cp\u003eNo. The manufacturer starts this pump's application at mid-1991. Verify the actual crank configuration.\u003c\/p\u003e\u003cstrong\u003eDoes it fit an early small-nose crank?\u003c\/strong\u003e\u003cp\u003eNo. Boundary lists a separate small-nose-crank pump.\u003c\/p\u003e\u003cstrong\u003eIs the crank seal supplied?\u003c\/strong\u003e\u003cp\u003eBoundary requires the customer to supply an OEM crank seal before installation.\u003c\/p\u003e\u003cstrong\u003eWhat does Stage 2 change?\u003c\/strong\u003e\u003cp\u003eThe pump uses a deeper pocket and larger gears to increase flow.\u003c\/p\u003e\u003cstrong\u003eWhat does MartenWear treat?\u003c\/strong\u003e\u003cp\u003eIt hardens the exterior wear surfaces of the billet gear components.\u003c\/p\u003e\u003cstrong\u003eWhat oil pressure will my engine make?\u003c\/strong\u003e\u003cp\u003eThat depends on the supplied pump\/shim configuration, oil, temperature and engine clearances. Confirm the specification sheet rather than assuming a fixed pressure.\u003c\/p\u003e\u003cstrong\u003eIs this the same as buying only gears?\u003c\/strong\u003e\u003cp\u003eNo. This listing is for an assembled pump; the separate gear photo illustrates the treatment.\u003c\/p\u003e\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\u003col\u003e\n\u003cli\u003eRead the pump specification sheet and current manufacturer instructions; verify the actual engine, crank and pump revision.\u003c\/li\u003e\n\u003cli\u003eHave a qualified technician follow the vehicle service procedure for access, engine timing and sealing.\u003c\/li\u003e\n\u003cli\u003eInstall BP-S2-M using the specified clearances, priming method and fastener torques; no universal torque value applies.\u003c\/li\u003e\n\u003cli\u003eVerify oil pressure, sealing and correct operation before loading the engine.\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003e\u003cstrong\u003eImage note:\u003c\/strong\u003e Manufacturer and supplier product-family views illustrate the assembly and gear design. Treatment and back-plate contents follow the exact part number above; representative open views do not show every supplied component.\u003c\/p\u003e","brand":"Boundary","offers":[{"title":"Default Title","offer_id":67817243181135,"sku":"BOUBP-S2-M","price":569.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/boundary-bp-s2-m-front-1000.webp?v=1792540151","url":"https:\/\/www.blackopsautoworks.com\/products\/boundary-91-05-mazda-miata-1-6l-1-8l-martenwear-high-flow-oil-pump-assembly","provider":"Black Ops Auto Works","version":"1.0","type":"link"}