{"product_id":"holley-terminator-x-stealth-4150-universal-550-1001","title":"Holley Terminator X Stealth 4150, Universal | 550-1001","description":"\u003cp\u003eThe Terminator X Stealth 4150 EFI system bolts on as a carburetor replacement and features four 100 lb\/hr fuel injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction. The self-learning Terminator X ECU handles fuel mapping and ignition timing control for improved idle stability, drivability, and wide-open-throttle horsepower, and the Stealth 4150 includes transmission kickdown provisions for GM TH350\/400, 200R4\/700R4 and Ford C4\/C6 applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBolt-on 4150 flange carburetor replacement\u003c\/li\u003e\n\u003cli\u003eSupports up to 650 HP with four 100 lb\/hr injectors\u003c\/li\u003e\n\u003cli\u003eTransmission kickdown provisions for GM TH350\/400, 200R4\/700R4 and Ford C4\/C6\u003c\/li\u003e\n\u003cli\u003eTerminator X Max versions (550-1011, 550-1012, 550-1013) add transmission control for pre-2009 GM 4L60E\/4L80E\u003c\/li\u003e\n\u003cli\u003eInternal 1bar MAP sensor built into the ECU\u003c\/li\u003e\n\u003cli\u003eAll wiring exits below the rear fuel injector cover for a stealth installation\u003c\/li\u003e\n\u003cli\u003eTimed spark port for vacuum advance distributors, located under the front fuel bowl\u003c\/li\u003e\n\u003cli\u003eAir entry machined to fit most stock-style air cleaners\u003c\/li\u003e\n\u003cli\u003eRequires an external fuel pressure regulator set to 58.5 PSI base (such as Holley 12-886)\u003c\/li\u003e\n\u003cli\u003eIntegrated ignition timing control improves idle stability, fuel economy, and WOT performance\u003c\/li\u003e\n\u003cli\u003eHigh-resolution full color touchscreen handheld for setup, tuning, and gauge displays\u003c\/li\u003e\n\u003cli\u003eSimple calibration wizard builds a base map from basic engine questions — no laptop required\u003c\/li\u003e\n\u003cli\u003eIncludes a genuine Bosch LSU 4.9 wideband oxygen sensor for real-time fuel map learning\u003c\/li\u003e\n\u003cli\u003eOEM-style TPS\/IAC for long-term reliability\u003c\/li\u003e\n\u003cli\u003eAvailable in Shiny, Black, and Gold finishes\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFlange Size\/Style: 4150 Squarebore\u003c\/li\u003e\n\u003cli\u003eCFM: 950\u003c\/li\u003e\n\u003cli\u003eThrottle Bore: 1.75 in.\u003c\/li\u003e\n\u003cli\u003eInjector Size: 100 lb\/hr @ 58.5 PSI\u003c\/li\u003e\n\u003cli\u003eInlet\/Outlet Size: 6 AN\u003c\/li\u003e\n\u003cli\u003eFuel Pressure: 58.5 PSI\u003c\/li\u003e\n\u003cli\u003eMAP Sensor: 1 bar (internal)\u003c\/li\u003e\n\u003cli\u003eMax Horsepower Rating: 650\u003c\/li\u003e\n\u003cli\u003eHandheld Included: Yes\u003c\/li\u003e\n\u003cli\u003eIgnition Type: Universal\u003c\/li\u003e\n\u003cli\u003eFinish: Shiny\u003c\/li\u003e\n\u003cli\u003ePart Number: 550-1001\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eRequires an external fuel pressure regulator (such as Holley 12-886) set to a base pressure of 58.5 PSI.\u003c\/p\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch5\u003eHow much horsepower can this system support?\u003c\/h5\u003e\u003cp\u003eUp to 650 HP naturally aspirated or 600 HP on forced induction, using the included four 100 lb\/hr injectors.\u003c\/p\u003e\u003ch5\u003eDoes it include a handheld tuner?\u003c\/h5\u003e\u003cp\u003eYes, a high-resolution full color touchscreen handheld is included for setup, tuning, and gauge displays.\u003c\/p\u003e\u003ch5\u003eDo I need an external fuel pressure regulator?\u003c\/h5\u003e\u003cp\u003eYes, an external regulator set to a base pressure of 58.5 PSI is required, such as Holley part 12-886.\u003c\/p\u003e\u003ch5\u003eDoes this system support transmission control?\u003c\/h5\u003e\u003cp\u003eThe base Stealth 4150 includes kickdown provisions for GM TH350\/400, 200R4\/700R4 and Ford C4\/C6. Full transmission control for pre-2009 GM 4L60E\/4L80E requires the Terminator X Max versions (550-1011, 550-1012, 550-1013).\u003c\/p\u003e\u003ch5\u003eWhat flange does this system use?\u003c\/h5\u003e\u003cp\u003eA 4150 squarebore flange with 1.75 in. throttle bores flowing 950 CFM.\u003c\/p\u003e\u003ch5\u003eWhat finish options are available?\u003c\/h5\u003e\u003cp\u003eShiny, Black, and Gold.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"How much horsepower can this system support?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Up to 650 HP naturally aspirated or 600 HP on forced induction, using the included four 100 lb\/hr injectors.\"}},{\"@type\":\"Question\",\"name\":\"Does it include a handheld tuner?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, a high-resolution full color touchscreen handheld is included for setup, tuning, and gauge displays.\"}},{\"@type\":\"Question\",\"name\":\"Do I need an external fuel pressure regulator?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, an external regulator set to a base pressure of 58.5 PSI is required, such as Holley part 12-886.\"}},{\"@type\":\"Question\",\"name\":\"Does this system support transmission control?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The base Stealth 4150 includes kickdown provisions for GM TH350\/400, 200R4\/700R4 and Ford C4\/C6. Full transmission control for pre-2009 GM 4L60E\/4L80E requires the Terminator X Max versions.\"}},{\"@type\":\"Question\",\"name\":\"What flange does this system use?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A 4150 squarebore flange with 1.75 in. throttle bores flowing 950 CFM.\"}},{\"@type\":\"Question\",\"name\":\"What finish options are available?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Shiny, Black, and Gold.\"}}]}\u003c\/script\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":42418589007920,"sku":"GVMR_550-1001","price":1949.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0586\/9548\/3440\/files\/550-1001_x-collage.jpg?v=1758385883","url":"https:\/\/berryperformancesales.com\/products\/holley-terminator-x-stealth-4150-universal-550-1001","provider":"Berry Performance Sales","version":"1.0","type":"link"}