{"product_id":"gm-ls-compatible-427-c-i-engine-and-4l80e-automatic-transmission-800-horsepower-standard-edition-builder-series-with-polished-pulley-kit-supercharged","title":"GM LS Compatible 427 c.i. Engine and 4L80E Automatic Transmission - 830 Horsepower - Standard Edition Builder Series - Natural Pulley Kit - Holley Terminator X EFI System","description":"\u003ch4\u003eOverview:\u003c\/h4\u003e\n\u003carticle class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-6924602d-70fc-832b-9c68-b3fed109cbb1-5\" data-testid=\"conversation-turn-94\" data-scroll-anchor=\"true\" data-turn=\"assistant\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:--spacing(4)] thread-sm:[--thread-content-margin:--spacing(6)] thread-lg:[--thread-content-margin:--spacing(16)] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] thread-lg:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" tabindex=\"-1\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"0698276a-aaa2-4006-b1e8-b90b59260597\" dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal [.text-message+\u0026amp;]:mt-1\" data-message-model-slug=\"gpt-5-1\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden first:pt-[1px]\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert w-full break-words dark markdown-new-styling\"\u003e\n\u003cp data-start=\"240\" data-end=\"938\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eBluePrint Engines brings modern muscle to the forefront with this 830-horsepower LS 427 Builder Series package paired to the rock-solid 4L80E automatic transmission. Designed for drivers who want brutal power with everyday reliability, this setup features Holley’s Terminator X EFI system for dead-on fuel control, crisp throttle response, and easy tuning. The engine is built with premium internals, meticulous machining, and pro-series durability to handle hard launches, high rpm, and anything else you can throw at it. Finished with a clean natural pulley kit for a purposeful, performance-first look, this 427\/4L80E combo is the ultimate turnkey LS solution for serious street or strip builds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e\n\u003ch4\u003eDescription: \u003c\/h4\u003e\n\u003cdiv class=\"product-custom-info\"\u003e\n\u003cul\u003e\n\u003cli\u003eHorsepower \u0026amp; Torque: 830 Horsepower \/ 800 ft. lbs. Torque\u003c\/li\u003e\n\u003cli\u003eCompression Ratio: 9.5:1\u003c\/li\u003e\n\u003cli\u003eBluePrint Engines Aluminum Heads\u003c\/li\u003e\n\u003cli\u003eBluePrint Engines Hydraulic Roller Cam\u003c\/li\u003e\n\u003cli\u003eBluePrint Engines Forged Crank\u003c\/li\u003e\n\u003cli\u003eBluePrint Engines Forged Pistons\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eBlock:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eBluePrint Engines High Strength Cast Iron Block\u003c\/li\u003e\n\u003cli\u003eIncreased Deck Thickness and Strength Webbing\u003c\/li\u003e\n\u003cli\u003eExtended Cylinder Skirt\u003c\/li\u003e\n\u003cli\u003ePriority Main Oiling\u003c\/li\u003e\n\u003cli\u003e6-Bolt Main\u003c\/li\u003e\n\u003cli\u003e1-Piece Rear Main Seal\u003c\/li\u003e\n\u003cli\u003eImproved Water Jacket Design\u003c\/li\u003e\n\u003cli\u003eUtilizes OEM LS3 Front and Rear Covers\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eRotating Assembly:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eNew Forged Crankshaft\u003c\/li\u003e\n\u003cli\u003e4.125\" Stroke\u003c\/li\u003e\n\u003cli\u003eForged 6.125\" Connecting Rods\u003c\/li\u003e\n\u003cli\u003eForged Pistons\u003c\/li\u003e\n\u003cli\u003eFront and Rear Internally Balanced\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCylinder Heads:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eBluePrint Aluminum Cylinder Heads - \u003ca href=\"https:\/\/blueprintengines.com\/collections\/cylinder-heads\/products\/gm-ls-aluminum-cylinder-head-259cc-std-head-bolts-assembled-ps8015\" title=\"PS8015\" rel=\"noopener\" target=\"_blank\"\u003ePS8015\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e70cc Chamber\u003c\/li\u003e\n\u003cli\u003e2.165\" Intake \/ 1.590\" Exhaust Valves\u003c\/li\u003e\n\u003cli\u003e259cc Intake \/ 102cc Exhaust Runners\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCam Specs:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eHydraulic Roller\u003c\/li\u003e\n\u003cli\u003e.624 Intake \/ .624 Exhaust Lift\u003c\/li\u003e\n\u003cli\u003e239 Intake \/ 255 Exhaust Duration\u003c\/li\u003e\n\u003cli\u003e@.050-114 Degree Lobe Separation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eIgnition Timing:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eECM Supplied with Calibration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 class=\"product-custom-info\"\u003eHolley Terminator X Max Specific Features and Benefits:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eReal Time Fuel Map Learning Simplifies Tuning by Dynamically Adjusting the Base Fuel Rate\u003c\/li\u003e\n\u003cli\u003eOn Board Bosch LSU 4.9 Wideband Control, Enabling Accurate AFR Readings and Closed Loop Tuning\u003c\/li\u003e\n\u003cli\u003eEight High Impedance Injector Drivers, Ideal for Stock LS Injectors and Holley EFI Injectors\u003c\/li\u003e\n\u003cli\u003eIntegrated 1-Bar MAP Sensor for Naturally Aspirated or Nitrous Setups, with Harness Support for External Higher Bar Sensors if needed\u003c\/li\u003e\n\u003cli\u003e4 Configurable Inputs (12V, Ground, 5V, Frequency) and 2 Outputs (Ground, PWM) - Ideal for Electric Fans, Boost Control Solenoids, Nitrous Control and more\u003c\/li\u003e\n\u003cli\u003eFree PC Tuning Software via USB\/CAN Interface for Full Laptop Control and Advance Setup\u003c\/li\u003e\n\u003cli\u003eIntegrated 3.5\" Touchscreen Handheld with Setup Wizard, Internal Data Logging, and Real Time Gauge Displays\u003c\/li\u003e\n\u003cli\u003eTerminator X Max ECU will Include a Base Timing Map Pre-Configured for this engine.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAlso Includes:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e2.3L Magnuson TVS Super Charger\u003c\/li\u003e\n\u003cli\u003eUpgraded Motor tron S107 Injectors\u003c\/li\u003e\n\u003cli\u003eElectronic Fuel Injection\u003c\/li\u003e\n\u003cli\u003eCoil Packs\u003c\/li\u003e\n\u003cli\u003eValve Covers\u003c\/li\u003e\n\u003cli\u003eOil Pan\u003c\/li\u003e\n\u003cli\u003eDrive by Wire Throttle Body\u003c\/li\u003e\n\u003cli\u003eTiming Cover\u003c\/li\u003e\n\u003cli\u003eSpark Plugs and Wires\u003c\/li\u003e\n\u003cli\u003eHarmonic Balancer\u003c\/li\u003e\n\u003cli\u003eNatural Front Accessory Drive\n\u003cul\u003e\n\u003cli\u003eLT1 Style 150-amp Alternator\u003c\/li\u003e\n\u003cli\u003eLT1 Style Water Pump\u003c\/li\u003e\n\u003cli\u003eType II Power Steering Pump\u003c\/li\u003e\n\u003cli\u003eCompact Style A\/C Compressor \u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAssembled with Complete HD 4l80e Transmission Package:\u003c\/h4\u003e\n\u003ch4\u003e      Includes the following: \u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e4L80E Complete Package\u003c\/li\u003e\n\u003cli\u003eElectronic Transmission Controller Included\u003c\/li\u003e\n\u003cli\u003e3200+ Stall Torque Converter\u003c\/li\u003e\n\u003cli\u003eFlex Plate\u003c\/li\u003e\n\u003cli\u003eStarter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e4L80E Gear Ratios:\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul style=\"font-weight: 400;\"\u003e\n\u003cli\u003e1: 2.482\u003c\/li\u003e\n\u003cli\u003e2: 1.482\u003c\/li\u003e\n\u003cli\u003e3: 1.00\u003c\/li\u003e\n\u003cli\u003e4: 0.750\u003c\/li\u003e\n\u003cli\u003eR: 2.077\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eNotes:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eThis Holley EFI Equipped engine has a fully calibrated ECU by BluePrint Engines. Please \u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eDO NOT\u003c\/span\u003e \u003c\/strong\u003efollow the Holley EFI manual for the calibration of the ECU.\u003c\/li\u003e\n\u003cli\u003eRetro fit oil pan will fit most 1955-1995 GM front engine, RWD, V8 cars\u003cbr\u003eNot for use in pollution-controlled vehicles or in dry sump applications.\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal; mso-list: l0 level1 lfo1; tab-stops: list .5in;\"\u003e\n\u003cspan style=\"mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 0pt; mso-ligatures: none;\"\u003eThe front accessory drive on this engine fits many vehicles, however it is the customer responsibility to accurately measure and confirm fitment.  Note this is a low-profile design, but things such as power steering hoses, alternator wiring, and additional fittings\/fabrication may be required on some vehicles.\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBluePrint Engines Recommends Air Intake Kit \u003ca href=\"https:\/\/blueprintengines.com\/products\/blueprint-engines-air-intake-kit-for-ls-engines\"\u003eBPPLS01013\u003c\/a\u003e to ensure correct MAF calculations and Dyno calibration are maintained with the provided ECU \/ tuning.\u003c\/li\u003e\n\u003cli\u003eEngine\/Trans Package Ships assembled\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-custom-info\"\u003e\n\u003ca style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\" href=\"https:\/\/www.p65warnings.ca.gov\/\" title=\"https:\/\/www.p65warnings.ca.gov\/\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2160\/9839\/files\/warning.png?v=1634161036\"\u003e \u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2160\/9839\/files\/emissions5.png?v=1634153040\"\u003e\u003c\/a\u003e\u003cbr\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-custom-info\"\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"BluePrint Engines","offers":[{"title":"Default Title","offer_id":50468178428190,"sku":"BLS4279SCTK4L8","price":49203.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7171\/1262\/files\/BLS4279SCTK4L8.png?v=1767160542","url":"https:\/\/platinumhpsolutions.myshopify.com\/fr\/products\/gm-ls-compatible-427-c-i-engine-and-4l80e-automatic-transmission-800-horsepower-standard-edition-builder-series-with-polished-pulley-kit-supercharged","provider":"Platinum High Performance Solutions, LLC.","version":"1.0","type":"link"}