{"title":"Subaru Ascent","description":"\u003cp\u003eBrowse parts listed for Subaru Ascent. Filter by version and year, then check the exact application on each product.\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/collections\/all-products?vehicle_selection_id=sbv-model-v1-0cf36cf62e0ebf034f3ce495688aba13\"\u003eView Subaru Ascent parts\u003c\/a\u003e\u003c\/p\u003e","products":[{"product_id":"nostrum-subaru-fa24-upgraded-high-pressure-fuel-pump","title":"Nostrum Subaru FA24 2.4 Upgraded High Pressure Fuel Pump","description":"\u003ch2\u003eSummary\u003c\/h2\u003e\u003cp\u003eSubaru's FA24 responds well to basic bolt-ons, then the factory fuel system holds it back. This Nostrum pump fixes the delivery side: 37% more displacement than standard, rated to 200 bar, fully assembled and flow tested before sale. More volume in the mid range means the tune can bring boost in earlier and hold it, felt as low-end torque rather than a single number at the top. It is ethanol compatible, so a 2022-on WRX, Ascent or Legacy can run pump E85 with the high pressure side keeping up.\u003c\/p\u003e\u003ch2\u003eBest For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eA bolt-on FA24 WRX where the tuner is already pulling boost in the mid range to keep rail pressure honest.\u003c\/li\u003e\n\u003cli\u003eAscent and Legacy owners who tow or cover long distances and want usable low-end torque rather than a peak figure.\u003c\/li\u003e\n\u003cli\u003eCars moving onto pump E85, where the high pressure side has to move considerably more volume.\u003c\/li\u003e\n\u003cli\u003eStaged builds - the pump can be fitted and driven on now, with the injectors following later.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eLow-End Boost And The FA24 Fuel Ceiling\u003c\/h2\u003e\u003cp\u003eThis pump is driven off the camshaft at half crank speed, so what it delivers is tied to engine speed. In the mid range there is plenty of crank angle per injection event but not enough volume behind it, and that is where the standard FA24 pump gives up once boost climbs. Adding 37% displacement lets the calibrator ask for boost sooner and keep the fuel target. That changes the shape of the torque curve, not just its ceiling.\u003c\/p\u003e\u003ch2\u003eAdding The Injectors Later\u003c\/h2\u003e\u003cp\u003ePump and injectors solve different halves of the same problem: pump limits show in the mid range, injector limits at high rpm as time per injection event runs short. Nostrum recommends pairing this pump with the \u003ca href=\"\/products\/nostrum-subaru-fa24-upgraded-direct-injectors\"\u003eFA24 upgraded direct injectors\u003c\/a\u003e to finish the job, and the \u003ca href=\"\/products\/nostrum-nostrum-subaru-fa24-bundle-h186-2058\"\u003eFA24 bundle\u003c\/a\u003e supplies both together. Because the pump can be driven on without a tune, it is a reasonable place to start if you are spreading the spend.\u003c\/p\u003e\u003ch2\u003eKey Specs\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eManufacturer: Nostrum High Performance\u003c\/li\u003e\n\u003cli\u003eProduct type: high pressure fuel pump (HPFP), fully assembled\u003c\/li\u003e\n\u003cli\u003eSKU: H136-1769\u003c\/li\u003e\n\u003cli\u003eDisplacement: 37% more than the factory pump\u003c\/li\u003e\n\u003cli\u003eMax operating pressure: 200 bar\u003c\/li\u003e\n\u003cli\u003e100% flow tested before sale; ethanol compatible, E85 recommended\u003c\/li\u003e\n\u003cli\u003eIncluded: direct fit pump and installation instructions; COBB recommended\u003c\/li\u003e\n\u003cli\u003eWarranty: Nostrum limited lifetime\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment And Setup Checks\u003c\/h2\u003e\u003cp\u003eNostrum covers the 2022-on WRX, 2019-on Ascent and 2020-2024 Legacy - turbocharged FA24 only. The pump can be installed and driven on without a tune, but Nostrum recommends calibrating to use its full capacity, so treat the tuning as part of the plan. The 725 whp gasoline and 585 whp E85 figures are the fuel system's supported potential on a build with matching air handling, mechanical strength and calibration. On ethanol, full pump E85 is preferred to intermediate blends, which can leave residue in any fuel system.\u003c\/p\u003e\u003ch3\u003eVehicle Fitment\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e2022+\u003c\/td\u003e\n\u003ctd\u003eSubaru WRX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2019+\u003c\/td\u003e\n\u003ctd\u003eSubaru Ascent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2020-2024\u003c\/td\u003e\n\u003ctd\u003eSubaru Legacy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eNostrum High Performance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eHigh pressure fuel pump (HPFP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH136-1769\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Application\u003c\/td\u003e\n\u003ctd\u003eSubaru FA24 2.4 turbo (direct injection)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplacement Increase\u003c\/td\u003e\n\u003ctd\u003e37% over stock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Operating Pressure\u003c\/td\u003e\n\u003ctd\u003e200 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly\u003c\/td\u003e\n\u003ctd\u003eFully assembled, 100% flow tested\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel Compatibility\u003c\/td\u003e\n\u003ctd\u003eEthanol compatible, E85 recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Items\u003c\/td\u003e\n\u003ctd\u003eDirect fit pump, installation instructions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTune Requirement\u003c\/td\u003e\n\u003ctd\u003eDriveable untuned; calibration recommended (COBB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel System Capacity\u003c\/td\u003e\n\u003ctd\u003e725 whp gasoline \/ 585 whp E85 with full supporting build\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003eLimited lifetime\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eWill the pump on its own give me more peak power?\u003c\/h3\u003e\u003cp\u003eNot usually. The pump lifts the mid range where volume is short; peak power is normally injector limited. Your tuner's logs will show which limit you meet first.\u003c\/p\u003e\u003ch3\u003eDoes it fit the naturally aspirated FA24 in the BRZ?\u003c\/h3\u003e\u003cp\u003eNo. This pump is for the turbocharged FA24 in the WRX, Ascent and Legacy. The BRZ and GT86 use a different fuel system entirely.\u003c\/p\u003e\u003ch3\u003eCan I drive the car before it is tuned?\u003c\/h3\u003e\u003cp\u003eNostrum lists no tune requirement for the pump and says it can be driven on, but recommends a calibration to use its full capacity. Book the tune sooner rather than later.\u003c\/p\u003e","brand":"Nostrum High Performance","offers":[{"title":"Default Title","offer_id":54805988311382,"sku":"H136-1769","price":1738.27,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/files\/H136-1769_14-Enhanced-NR__33968.1731537206_f02402d5-4486-4820-90d0-a7565ed2f5a8.png?v=1784905318"},{"product_id":"nostrum-nostrum-subaru-fa24-bundle-h186-2058","title":"Nostrum Subaru FA24 Turbo Fuel Bundle | H186-2058","description":"\u003cp\u003e\u003cstrong\u003eGive your turbo FA24 more fuel to work with.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eA bigger turbo or an ethanol calibration can ask more of the fuel system than the original pump and injectors can supply. This Nostrum FA24 bundle upgrades the high-pressure pump and direct-injection side together, so the fuelling can be developed alongside the rest of your build.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e H186-2058\u003c\/p\u003e\u003ch2\u003eWhy a complete fuelling upgrade?\u003c\/h2\u003e\u003cp\u003ePump capacity and injector capacity become limiting in different ways. The pump must maintain the required rail supply under load; the injectors must deliver the fuel within a shrinking window as revs rise. Addressing both gives your calibrator more room to use the engine's airflow instead of stopping at the next fuel-system restriction.\u003c\/p\u003e\u003ch2\u003eKeep the direct-injection system\u003c\/h2\u003e\u003cp\u003eThe upgrade works through the engine's direct-injection system and original ECU. That is useful if you want to increase fuel capacity without adding a separate port-injection controller or relying on a supplementary methanol tank. The calibration still needs to be developed for the exact pump and injector data.\u003c\/p\u003e\u003ch2\u003eFor the turbo FA24\u003c\/h2\u003e\u003cp\u003eThis is a turbo FA24 fuel-system bundle. It is not for the naturally aspirated FA24 in the Subaru BRZ or Toyota GR86, which uses the different Toyota D-4S injection system. The WRX FA24F is the relevant engine type, not the earlier FA20.\u003c\/p\u003e\u003ch2\u003eWhat the purchase covers\u003c\/h2\u003e\u003cp\u003eThe H186-2058 bundle combines an upgraded high-pressure pump with upgraded direct injectors. Custom calibration is separate. Choose the bundle when the engine needs both, rather than treating a larger fuel pump alone as a complete answer to a high-power build.\u003c\/p\u003e\u003ch2\u003eInstallation and calibration\u003c\/h2\u003e\u003cp\u003eArrange the calibration alongside fitting. The pump and injectors need the correct data in the ECU before the upgraded system is used. Your tuner should assess low-pressure supply, fuel choice and the rest of the engine build together, then validate the result in logs. The hardware purchase does not include a custom tune.\u003c\/p\u003e\u003ch2\u003eWarranty\u003c\/h2\u003e\u003cp\u003eNostrum's limited lifetime warranty covers manufacturing defects in its manufactured parts, subject to its terms. Installation and removal labour, diagnostics, misuse and damage from incorrect installation or tuning are excluded.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cdiv class=\"table-scroll\"\u003e\u003ctable class=\"technical-specifications\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eSpecification\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eNostrum High Performance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH186-2058\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eTurbocharged Subaru FA24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003eHigh-pressure pump and direct-injector bundle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel delivery\u003c\/td\u003e\n\u003ctd\u003eDirect injection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eECU control\u003c\/td\u003e\n\u003ctd\u003eOriginal ECU with suitable calibration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExcluded applications\u003c\/td\u003e\n\u003ctd\u003eNaturally aspirated BRZ\/GR86 FA24 D-4S; FA20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalibration\u003c\/td\u003e\n\u003ctd\u003eRequired; separate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eDoes this fit a BRZ or GR86?\u003c\/h3\u003e\u003cp\u003eNo. Their naturally aspirated FA24 uses a different D-4S injection system.\u003c\/p\u003e\u003ch3\u003eWhy upgrade the injectors as well as the pump?\u003c\/h3\u003e\u003cp\u003eExtra pump supply does not increase the amount a standard injector can deliver in its available injection window. A build can need more capacity in both.\u003c\/p\u003e\u003ch3\u003eIs this a bolt-on power increase without a tune?\u003c\/h3\u003e\u003cp\u003eNo. The bundle needs calibration for the upgraded fuelling hardware. The pump-only tuning advice does not apply to a pump-and-injector bundle.\u003c\/p\u003e\u003ch3\u003eCan I keep the original ECU?\u003c\/h3\u003e\u003cp\u003eYes, with suitable calibration for the direct-injection hardware. A separate port-injection controller is not part of this approach.\u003c\/p\u003e","brand":"Nostrum High Performance","offers":[{"title":"Default Title","offer_id":54805996437846,"sku":"H186-2058","price":3399.39,"currency_code":"GBP","in_stock":true}]}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/1849\/9926\/collections\/hoonies-model-subaru-ascent-20261010-7ed1c9b04fca.webp?v=1791643092","url":"https:\/\/hooniesadrenaline.co.uk\/collections\/subaru-ascent.oembed","provider":"Hoonies Adrenaline","version":"1.0","type":"link"}