{"product_id":"ls1-ls2-ls6-intake-manifold-650-cfm-carburetor-kit","title":"EVIL ENERGY LS1 LS2 LS6 Cathedral Port Single Plane Intake Manifold \u0026 650 CFM Carburetor Kit","description":"\u003cp\u003e---!@!start!@!---Specifications---!@!end!@!---\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\"\u003e\n\u003cdiv align=\"left\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/www.ievilenergy.com\/products\/ls-single-plane-carburetor-intake-manifold-ls1-ls2-ls6\"\u003eEVIL ENERGY LS1 LS2 LS6 Single Plane Carburetor Intake Manifold\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\n\u003cdiv align=\"left\"\u003eBrand\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd\u003e\n\u003cdiv align=\"left\"\u003eEVIL ENERGY\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\n\u003cdiv align=\"left\"\u003ePart Number\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd\u003e\n\u003cdiv align=\"left\"\u003e300-132\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\n\u003cdiv align=\"left\"\u003eProduct Name\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd\u003e\n\u003cdiv align=\"left\"\u003eLS Single Plane Carburetor Intake Manifold for LS1\/LS2\/LS6 Cathedral Port Engines\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\n\u003cdiv align=\"left\"\u003eManifold Type\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd\u003e\n\u003cdiv align=\"left\"\u003eSingle Plane Carburetor Intake Manifold\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\n\u003cdiv align=\"left\"\u003eFuel System Compatibility\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd\u003e\n\u003cdiv align=\"left\"\u003eCarburetor\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\n\u003cdiv align=\"left\"\u003eIntake Style\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd\u003e\n\u003cdiv align=\"left\"\u003eHigh-RPM single plane LS carburetor intake layout\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\n\u003cdiv align=\"left\"\u003eRPM Range\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd\u003e\n\u003cdiv align=\"left\"\u003e5000-7500+ RPM, depending on the full engine combination\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\n\u003cdiv align=\"left\"\u003eMaterial\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd\u003e\n\u003cdiv align=\"left\"\u003eCast Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\n\u003cdiv align=\"left\"\u003eColor \/ Variant\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd\u003e\n\u003cdiv align=\"left\"\u003eSilver \/ Black \/ Polished Silver\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\n\u003cdiv align=\"left\"\u003eCompatible Engine Family\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd\u003e\n\u003cdiv align=\"left\"\u003eGM LS Gen III or Gen IV engines equipped with LS1\/LS2\/LS6 style cathedral port cylinder heads\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\n\u003cdiv align=\"left\"\u003eCompatible Engines\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd\u003e\n\u003cdiv align=\"left\"\u003eLS1 5.7L Gen III, LS2 6.0L Gen IV, LS6 5.7L Gen III, and compatible cathedral port LS combinations\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\n\u003cdiv align=\"left\"\u003eNot Compatible With\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd\u003e\n\u003cdiv align=\"left\"\u003eLS3\/L92\/L99\/L76 rectangular port cylinder heads unless the engine has been converted to compatible cathedral port heads\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\n\u003cdiv align=\"left\"\u003eCommon Reference Applications\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd\u003e\n\u003cdiv align=\"left\"\u003eChevrolet Corvette C5, Chevrolet Camaro, Pontiac Firebird \/ Trans Am, Cadillac CTS-V, Holden Monaro \/ Commodore \/ HSV, Pontiac GTO, Chevrolet SSR, and other compatible LS1\/LS2\/LS6 cathedral port applications. Final fitment depends on engine, cylinder heads, carburetor setup, ignition control, hood clearance, and installation configuration.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e\n\u003cdiv align=\"left\"\u003eBest Use\u003c\/div\u003e\n\u003c\/th\u003e\n\u003ctd\u003e\n\u003cdiv align=\"left\"\u003eHigh-RPM LS carburetor builds, drag applications, track-day platforms, performance street cars, LS swaps, and compatible boosted LS combinations\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable width=\"\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/www.ievilenergy.com\/products\/650-cfm-4-barrel-carburetor-adjustable-air-valve\"\u003eEVIL ENERGY 650 CFM 4-barrel Carburetor Adjustable Air Valve\u003c\/a\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eEVIL ENERGY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBarrels\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCFM\u003c\/td\u003e\n\u003ctd\u003e650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarburetor Flange\u003c\/td\u003e\n\u003ctd\u003eSquare bore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChoke Type\u003c\/td\u003e\n\u003ctd\u003emanual control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSecondary Throttle Type\u003c\/td\u003e\n\u003ctd\u003eAdjustable Air Valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel Inlet\u003c\/td\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalibration\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003eMain Jets:#101\u003cbr\u003eSecondary Jets:#98\u003cbr\u003eAccelerator Pump Nozzle:0.028 inch\u003cbr\u003eMetering Rods:0.070'x 0.037' inch\u003cbr\u003ePower Valve :Metering rod system\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVenturi Diameter\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e1.19 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThrottle Bore Diameter\u003c\/td\u003e\n\u003ctd\u003ePrimary throttle Bore: 1.44 inch\u003cbr\u003eSecondary throttle Diameter: 1.69 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCarburetor Height\u003cbr\u003e\n\u003c\/td\u003e\n\u003ctd\u003e3.25 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility \u003c\/td\u003e\n\u003ctd\u003eGM, Ford, Chrysler AT Shift Linkage Assemblies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemanufactured\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e---!@!start!@!---Description---!@!end!@!---\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"EVIL ENERGY LS1 LS2 LS6 single plane LS carburetor intake and 650 CFM carburetor kit\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0590\/5403\/0984\/files\/EVIL_ENERGY_LS1_LS2_LS6_Single_Plane_Carburetor_Intake_Manifold-black-7.7-a1.webp?v=1783476855\"\u003e\u003c\/p\u003e\n\u003ch2\u003eLS1 LS2 LS6 Single Plane Intake Manifold \u0026amp; 650 CFM Carburetor Kit\u003c\/h2\u003e\n\u003cp\u003eConverting a compatible LS engine from EFI to a carbureted setup requires the intake manifold, carburetor, ignition control, fuel delivery, and mechanical interfaces to work together. This EVIL ENERGY \u003cstrong\u003eLS carburetor intake\u003c\/strong\u003e kit combines a single plane manifold for compatible \u003cstrong\u003eLS1, LS2, and LS6-style cathedral-port engines\u003c\/strong\u003e with a \u003cstrong\u003e650 CFM carburetor\u003c\/strong\u003e for performance-oriented LS combinations where higher-RPM airflow and adjustable secondary response are priorities.\u003c\/p\u003e\n\u003cp\u003eThe 650 CFM configuration provides a more moderate airflow option than stepping directly into a larger carburetor, but carburetor size still needs to match the complete engine combination. The single plane manifold is designed around higher engine speeds, so displacement, camshaft, cylinder heads, exhaust, gearing, ignition control, and intended RPM range should all be considered before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment first:\u003c\/strong\u003e This intake is designed for compatible cathedral-port LS configurations. It is \u003cstrong\u003enot intended for LS3, L92, L99, L76, or other rectangular-port cylinder heads\u003c\/strong\u003e unless compatible cathedral-port heads have been installed.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"EVIL ENERGY LS single plane carburetor intake for LS1 LS2 LS6 high RPM performance builds\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0590\/5403\/0984\/files\/EVIL_ENERGY_LS1_LS2_LS6_Single_Plane_Carburetor_Intake_Manifold-black-7.7-a2.webp?v=1783476872\"\u003e\u003c\/p\u003e\n\u003ch2\u003eIs This Kit Right for Your LS Build?\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eEngine Configuration\u003c\/th\u003e\n\u003cth\u003eWhat to Know Before Ordering\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLS1 \/ LS2 \/ LS6-style cathedral-port heads\u003c\/td\u003e\n\u003ctd\u003eCompatible intake platform when the remaining fuel, ignition, linkage, gasket, and clearance requirements are verified.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLS3 \/ L92 \/ L99 \/ L76 rectangular-port heads\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eNot compatible\u003c\/strong\u003e unless compatible cathedral-port cylinder heads have been installed.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModified 5.7L LS1 \/ LS6\u003c\/td\u003e\n\u003ctd\u003e650 CFM can be a practical candidate when airflow demand, camshaft, cylinder heads, and operating RPM are appropriately matched.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6.0L LS2 performance combination\u003c\/td\u003e\n\u003ctd\u003eVerify airflow requirements against the complete engine combination and intended maximum RPM.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigher-RPM performance build\u003c\/td\u003e\n\u003ctd\u003eThe single plane intake is better aligned with higher-speed operation than a combination focused primarily on low-RPM torque.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHighly modified or increased-displacement LS\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eVerify carburetor airflow.\u003c\/strong\u003e Some combinations may require more airflow than 650 CFM can provide.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow-RPM cruising build\u003c\/td\u003e\n\u003ctd\u003eA different intake design may provide characteristics better matched to lower-speed operation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eIs a 650 CFM Carburetor Right for Your LS?\u003c\/h2\u003e\n\u003cp\u003eA \u003cstrong\u003e650 CFM carburetor\u003c\/strong\u003e should be selected from the airflow demand of the complete engine rather than displacement alone. Maximum RPM, volumetric efficiency, camshaft profile, cylinder-head airflow, compression ratio, exhaust, gearing, and intended use all influence the required carburetor size.\u003c\/p\u003e\n\u003cp\u003eThis combination can provide a useful middle ground for compatible performance LS builds that need more airflow than a mild street setup without automatically moving to a larger 750 or 850 CFM carburetor. However, an aggressively modified engine operating near the upper end of the manifold's intended range may require additional airflow.\u003c\/p\u003e\n\u003cp\u003eThe included \u003cstrong\u003eperformance carburetor\u003c\/strong\u003e uses an adjustable air valve secondary system. Secondary airflow increases with engine demand, while adjustment allows the secondary response to be better matched to the engine and vehicle combination instead of relying on one fixed response for every setup.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0590\/5403\/0984\/files\/A_PC_-1_4eb73f48-f0ba-4ec4-af25-cc334ec0a8bc.jpg?v=1751339464\" alt=\"EVIL ENERGY 650 CFM high performance carburetor with adjustable air valve secondaries\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003ch2\u003eWhy Use a Single Plane Intake with a 650 CFM Carburetor?\u003c\/h2\u003e\n\u003cp\u003eA single plane intake uses a common plenum feeding the intake runners and generally shifts the intake system toward higher-RPM airflow rather than maximizing low-speed response. This makes the manifold better suited to appropriately configured performance street, street\/strip, track, hot rod, and carbureted LS swap combinations.\u003c\/p\u003e\n\u003cp\u003ePairing the manifold with a \u003cstrong\u003e650 CFM carburetor\u003c\/strong\u003e creates a different balance than using a larger carburetor. The 650 CFM unit can provide adequate airflow for many appropriately matched combinations while retaining adjustable secondary response, but final sizing still depends on actual engine airflow demand.\u003c\/p\u003e\n\u003cp\u003eThe manifold's listed RPM range describes its intended operating characteristics; it is \u003cstrong\u003enot a safe engine-speed guarantee\u003c\/strong\u003e. Maximum engine RPM must be established from the rotating assembly, valvetrain, cylinder heads, camshaft, oiling system, ignition control, and calibration.\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0590\/5403\/0984\/files\/A_PC_-2_96974851-3be2-4e88-8f51-710d6bf7e707.jpg?v=1751339464\" alt=\"EVIL ENERGY 650 CFM square bore carburetor with adjustable air valve secondaries and manual choke\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003ch2\u003eLS1 LS2 LS6 Cathedral-Port Fitment\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eLS carburetor intake\u003c\/strong\u003e is designed around compatible GM LS Gen III and Gen IV engines equipped with \u003cstrong\u003eLS1, LS2, or LS6-style cathedral-port cylinder heads\u003c\/strong\u003e. Compatible combinations may include 5.7L LS1 and LS6 engines, 6.0L LS2 engines, and other verified cathedral-port LS configurations.\u003c\/p\u003e\n\u003cp\u003eReference applications may include Corvette C5, Camaro, Firebird \/ Trans Am, Pontiac GTO, Cadillac CTS-V, Chevrolet SSR, Holden Monaro \/ Commodore \/ HSV, and LS-swapped vehicles using a compatible engine and cylinder-head configuration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo not determine fitment from the vehicle model or LS engine name alone.\u003c\/strong\u003e Engine swaps and cylinder-head changes can alter intake compatibility. Confirm the actual intake-port architecture installed on the engine before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot compatible with LS3, L92, L99, or L76 rectangular-port cylinder heads\u003c\/strong\u003e unless compatible cathedral-port heads have been installed.\u003c\/p\u003e\n\u003ch2\u003eWhat Else Is Needed for an LS Carburetor Conversion?\u003c\/h2\u003e\n\u003cp\u003eAn \u003cstrong\u003eLS carburetor conversion\u003c\/strong\u003e requires more than replacing the EFI intake manifold. The carburetor controls airflow and fuel metering, but compatible ignition control, carburetor-pressure fuel delivery, mechanical linkage, choke operation, vacuum connections, and installation clearance still need to be established separately.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSystem\u003c\/th\u003e\n\u003cth\u003eWhat to Verify\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIgnition Control\u003c\/td\u003e\n\u003ctd\u003eA compatible LS ignition-control solution is generally required because the carburetor does not control ignition timing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel System\u003c\/td\u003e\n\u003ctd\u003eConfirm the fuel pump, regulator, filter, fuel lines, and fittings are configured for the carburetor's required operating pressure.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThrottle Linkage\u003c\/td\u003e\n\u003ctd\u003eVerify throttle cable, bracket, return springs, full throttle travel, and transmission linkage where applicable.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManual Choke\u003c\/td\u003e\n\u003ctd\u003eConfirm a compatible choke cable, correct routing, and full choke movement.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVacuum \/ PCV\u003c\/td\u003e\n\u003ctd\u003eIdentify PCV, brake-booster, and other required vacuum connections and properly seal unused ports.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir Cleaner \u0026amp; Clearance\u003c\/td\u003e\n\u003ctd\u003eCheck total induction-system height, including the manifold, carburetor, gasket, any spacer or adapter, and air cleaner.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eLS Single Plane Intake Manifold x 1\u003c\/th\u003e\n\u003ctd\u003eEVIL ENERGY carburetor intake manifold for compatible LS1, LS2, LS6, and verified cathedral-port LS applications.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003e650 CFM 4-Barrel Carburetor x 1\u003c\/th\u003e\n\u003ctd\u003eEVIL ENERGY square-bore carburetor with adjustable air valve secondaries and manual choke.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupplied Installation Hardware \u0026amp; Accessories\u003c\/th\u003e\n\u003ctd\u003eIncludes the mounting hardware and accessories supplied with the individual components.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eAdditional Parts to Check Before Ordering\u003c\/h3\u003e\n\u003cp\u003eThe exact installation parts depend on the engine and vehicle configuration. Check whether the build requires:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCompatible LS ignition controller\u003c\/li\u003e\n\u003cli\u003eIntake manifold and carburetor gaskets\u003c\/li\u003e\n\u003cli\u003eCarburetor-compatible fuel pump and\/or fuel pressure regulator\u003c\/li\u003e\n\u003cli\u003eFuel filter, fuel lines, fittings, and adapters\u003c\/li\u003e\n\u003cli\u003eThrottle cable bracket and return springs\u003c\/li\u003e\n\u003cli\u003eTransmission kickdown or TV cable components where applicable\u003c\/li\u003e\n\u003cli\u003eManual choke cable\u003c\/li\u003e\n\u003cli\u003eVacuum and PCV fittings\u003c\/li\u003e\n\u003cli\u003eAir cleaner assembly\u003c\/li\u003e\n\u003cli\u003eCarburetor spacer or adapter if required by the final installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eBefore Installation\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfirm the cylinder heads:\u003c\/strong\u003e Verify LS1, LS2, LS6, or another compatible cathedral-port configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck intake fitment:\u003c\/strong\u003e Verify intake-port alignment, bolt pattern, and intake gasket compatibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck the carburetor interface:\u003c\/strong\u003e Confirm mounting pattern, gasket, studs, and whether a spacer or adapter is required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlan ignition control:\u003c\/strong\u003e Establish the ignition-control strategy before converting from EFI to carburetor operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVerify the fuel system:\u003c\/strong\u003e Confirm the pump, regulator, filter, lines, fittings, and operating pressure are appropriate for carburetor operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck throttle operation:\u003c\/strong\u003e Verify throttle cable, bracket, return springs, and transmission linkage through the full range of travel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck manual choke operation:\u003c\/strong\u003e Confirm cable routing and full choke travel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck vacuum connections:\u003c\/strong\u003e Identify required PCV, brake-booster, and accessory vacuum ports before startup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck clearance:\u003c\/strong\u003e Include the manifold, carburetor, spacer or adapter, and air cleaner when checking hood and surrounding engine-bay clearance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInitial Setup \u0026amp; Tuning\u003c\/h2\u003e\n\u003cp\u003eA \u003cstrong\u003ehigh performance carburetor\u003c\/strong\u003e still requires the supporting systems and initial setup to be correct before metering changes are made. Final calibration depends on the complete engine combination.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eInspect the intake manifold, carburetor base, vacuum connections, and fuel connections for leaks.\u003c\/li\u003e\n\u003cli\u003eConfirm that fuel pressure and fuel delivery are suitable for carburetor operation.\u003c\/li\u003e\n\u003cli\u003eVerify ignition control and timing operation.\u003c\/li\u003e\n\u003cli\u003eCheck throttle and manual choke movement through their full range.\u003c\/li\u003e\n\u003cli\u003eSet and evaluate idle speed and idle mixture after the engine reaches operating temperature.\u003c\/li\u003e\n\u003cli\u003eEvaluate throttle transition and secondary response before changing metering components.\u003c\/li\u003e\n\u003cli\u003eAdjust the air valve secondary response only after the basic engine and fuel-system conditions have been verified.\u003c\/li\u003e\n\u003cli\u003eChange one calibration variable at a time and record the result.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eRich, lean, bogging, unstable-idle, or hard-start conditions should not automatically be treated as a carburetor jetting problem. Check for vacuum leaks, incorrect fuel pressure, fuel-delivery restrictions, float or needle-seat problems, ignition faults, and timing issues before changing carburetor calibration.\u003c\/p\u003e","brand":"EVILENERGY","offers":[{"title":"Black","offer_id":46377530228872,"sku":null,"price":399.99,"currency_code":"USD","in_stock":true},{"title":"Silver","offer_id":46377530261640,"sku":null,"price":389.99,"currency_code":"USD","in_stock":true},{"title":"Polished Silver","offer_id":46377530294408,"sku":null,"price":419.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0590\/5403\/0984\/files\/BUH0007019_FS23-00059SR-015-L.webp?v=1786613266","url":"https:\/\/www.ievilenergy.com\/products\/ls1-ls2-ls6-intake-manifold-650-cfm-carburetor-kit","provider":"EVILENERGY","version":"1.0","type":"link"}