{"product_id":"ls-efi-intake-manifold-fuel-rails-cathedral-port","title":"EVIL ENERGY LS1 LS2 LS6 EFI Intake Manifold with Fuel Rails","description":"\u003cp\u003e---!@!start!@!---Specifications---!@!end!@!---\u003c\/p\u003e\n\n\u003ch2\u003eIntake Manifold Product Details\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003cth\u003eBrand\u003c\/th\u003e\n      \u003ctd\u003eEVIL ENERGY\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003ctd\u003e300-137\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProduct Name\u003c\/th\u003e\n      \u003ctd\u003eLS EFI Intake Manifold with Fuel Rails for LS1\/LS2\/LS6 Cathedral Port Engines\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eManifold Type\u003c\/th\u003e\n      \u003ctd\u003eSingle Plane \/ Hybrid Performance EFI Intake Manifold\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eFuel System Compatibility\u003c\/th\u003e\n      \u003ctd\u003eEFI\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eIncluded Fuel Delivery\u003c\/th\u003e\n      \u003ctd\u003eFuel rails included\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eIntake Style\u003c\/th\u003e\n      \u003ctd\u003ePerformance LS EFI intake layout\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eOperating Range\u003c\/th\u003e\n      \u003ctd\u003eApprox. 3,500-5,500 RPM torque range and approx. 6,000-7,200 RPM horsepower range, depending on the full engine combination\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eMaterial\u003c\/th\u003e\n      \u003ctd\u003eCast Aluminum\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eColor \/ Variant\u003c\/th\u003e\n      \u003ctd\u003eSilver \/ Black\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eCompatible Engine Family\u003c\/th\u003e\n      \u003ctd\u003eGM LS Gen III or Gen IV engines equipped with LS1\/LS2\/LS6 style cathedral port cylinder heads\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eCompatible Engines\u003c\/th\u003e\n      \u003ctd\u003eLS1 5.7L Gen III, LS2 6.0L Gen IV, LS6 5.7L Gen III, and compatible cathedral port LS combinations\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eNot Compatible With\u003c\/th\u003e\n      \u003ctd\u003eLS3\/L92\/L99\/L76 rectangular port cylinder heads unless the engine has been converted to compatible cathedral port heads\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eCommon Reference Applications\u003c\/th\u003e\n      \u003ctd\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, throttle body, injectors, fuel system, hood clearance, and installation configuration.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eBest Use\u003c\/th\u003e\n      \u003ctd\u003ePerformance street cars, muscle cars, LS swaps, drift builds, track-day LS platforms, and EFI cathedral port intake upgrades\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e---!@!start!@!---Description---!@!end!@!---\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0590\/5403\/0984\/files\/A_1_dcd6938c-de9c-420f-a93c-7f25222c219b.webp?v=1783419492\" alt=\"EVIL ENERGY LS EFI intake manifold with fuel rails for LS1 LS2 LS6 cathedral port engines\"\u003e\u003c\/p\u003e\n\n\u003ch2\u003eEVIL ENERGY LS EFI Intake Manifold with Fuel Rails\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eEVIL ENERGY LS EFI intake manifold\u003c\/strong\u003e is designed for compatible \u003cstrong\u003eGM LS1, LS2, and LS6 cathedral port engines\u003c\/strong\u003e that need an EFI-ready intake upgrade with included fuel rails. This \u003cstrong\u003eLS intake manifold\u003c\/strong\u003e uses a cast aluminum performance layout for cathedral port LS combinations and is suitable for performance street cars, LS swaps, muscle car builds, drift cars, and track-day projects when the full engine setup supports the intake configuration.\u003c\/p\u003e\n\n\u003cp\u003eFor builders upgrading an \u003cstrong\u003eLS engine intake manifold\u003c\/strong\u003e, the included fuel rails help simplify the EFI intake setup, but final compatibility still depends on injector style, fuel line fittings, regulator setup, throttle body size, MAP\/IAT sensor needs, hood clearance, and tuning. This manifold is intended for LS1\/LS2\/LS6 style \u003cstrong\u003ecathedral port cylinder heads\u003c\/strong\u003e, not LS3\/L92\/L99\/L76 rectangular port heads.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Always confirm cylinder head port shape, throttle body compatibility, injector length, fuel rail fittings, hood clearance, sensor placement, vacuum ports, gasket style, and tuning requirements before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0590\/5403\/0984\/files\/A_2_173bfbe7-d9cf-45e5-94d6-b5345f1d4b41.webp?v=1783419520\" alt=\"LS1 LS2 LS6 cathedral port EFI intake manifold with cast aluminum body and fuel rails\"\u003e\u003c\/p\u003e\n\n\u003ch2\u003eVehicle and Engine Fitment\u003c\/h2\u003e\n\n\u003cp\u003eThis \u003cstrong\u003eEVIL ENERGY LS intake manifold\u003c\/strong\u003e is designed for GM LS Gen III or Gen IV engines equipped with LS1, LS2, or LS6 style cathedral port cylinder heads. Common reference applications include Chevrolet Corvette C5, Chevrolet Camaro, Pontiac Firebird \/ Trans Am, Cadillac CTS-V, Holden Monaro, Holden Commodore, Holden HSV, Pontiac GTO, Chevrolet SSR, and compatible LS-swapped platforms.\u003c\/p\u003e\n\n\u003cp\u003eVehicle names are provided as reference examples only. Engine swaps, cylinder head changes, throttle body selection, injector length, fuel rail fittings, hood clearance, accessory routing, sensor placement, and tuning can affect final fitment. Always verify that your engine uses \u003cstrong\u003ecathedral port LS cylinder heads\u003c\/strong\u003e before installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0590\/5403\/0984\/files\/A_3_dc7b3b6c-022f-4e38-ba20-56b459b1a54e.webp?v=1783419536\" alt=\"EVIL ENERGY cathedral port LS intake manifold for EFI performance builds with fuel rails\"\u003e\u003c\/p\u003e\n\n\u003ch2\u003eKey Features - EVIL ENERGY LS EFI Intake Manifold\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLS1\/LS2\/LS6 Cathedral Port Fitment:\u003c\/strong\u003e Designed for compatible GM LS Gen III or Gen IV engines using LS1, LS2, or LS6 style cathedral port cylinder heads.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEFI Intake Manifold Upgrade:\u003c\/strong\u003e Built for fuel-injected LS applications where the user needs an EFI-compatible intake manifold with fuel rails included.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFuel Rails Included:\u003c\/strong\u003e The included fuel rails help support the EFI plumbing layout. Confirm injector size, O-ring style, fuel line fittings, regulator setup, and fuel pressure requirements before installation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePerformance RPM Focus:\u003c\/strong\u003e The listed operating range targets mid-range and upper-RPM performance, depending on the full engine combination, camshaft, cylinder heads, throttle body, exhaust, and tuning.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCast Aluminum Construction:\u003c\/strong\u003e The cast aluminum body provides a durable intake platform for compatible LS performance street cars, muscle cars, LS swaps, drift builds, and track-day projects.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCathedral Port LS Build Support:\u003c\/strong\u003e A practical choice for builders working with LS1 intake manifold, LS2 intake manifold, or LS6 intake manifold upgrade paths where cathedral port compatibility is required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePackage Contents and Installation Checklist\u003c\/h2\u003e\n\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003cth\u003eEVIL ENERGY Intake Manifold, Part No. 300-137 x 1\u003c\/th\u003e\n      \u003ctd\u003eOne EVIL ENERGY LS EFI intake manifold for compatible GM LS1, LS2, and LS6 style cathedral port engines.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eEFI Fuel Rails x 1 Set\u003c\/th\u003e\n      \u003ctd\u003eIncludes matching fuel rails for the LS EFI intake manifold setup. Confirm injector length, O-ring size, fuel line fittings, regulator setup, and fuel pressure compatibility with your build before final installation.\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003eInstallation Hardware Kit x 1\u003c\/th\u003e\n      \u003ctd\u003eIncludes mounting hardware and installation accessories. Confirm all hardware against your engine, cylinder heads, intake gaskets, throttle body, sensors, and accessory setup before final installation.\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eBefore Installation, Check These Items\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003eConfirm that your engine uses LS1\/LS2\/LS6 style cathedral port cylinder heads.\u003c\/li\u003e\n  \u003cli\u003eDo not use this manifold on LS3\/L92\/L99\/L76 rectangular port heads unless your engine has compatible cathedral port heads installed.\u003c\/li\u003e\n  \u003cli\u003eConfirm throttle body size, bolt pattern, cable or drive-by-wire setup, and throttle linkage requirements.\u003c\/li\u003e\n  \u003cli\u003eCheck injector length, injector O-ring style, fuel rail fittings, fuel pressure regulator setup, and fuel line routing.\u003c\/li\u003e\n  \u003cli\u003eCheck MAP sensor, IAT sensor, vacuum ports, PCV routing, brake booster vacuum, and any required adapters.\u003c\/li\u003e\n  \u003cli\u003eCheck hood clearance, accessory bracket clearance, firewall clearance, and air intake tube routing.\u003c\/li\u003e\n  \u003cli\u003eUse suitable intake gaskets and follow the proper torque sequence during installation.\u003c\/li\u003e\n  \u003cli\u003eEFI intake manifold changes may require tuning or calibration adjustments depending on the vehicle and build.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0590\/5403\/0984\/files\/A_4_d1c59a34-cbc8-4cab-8cf6-54f878a6ab81.webp?v=1783419555\" alt=\"LS engine intake manifold with fuel rails for cathedral port EFI performance applications\"\u003e\u003c\/p\u003e\n\n\u003ch2\u003eWhy Choose This LS EFI Intake Manifold?\u003c\/h2\u003e\n\n\u003cp\u003eThis \u003cstrong\u003eLS EFI intake manifold with fuel rails\u003c\/strong\u003e is designed for builders who want an EFI-ready intake solution for compatible cathedral port LS engines. For many LS performance builds, airflow, injector compatibility, fuel rail setup, throttle body selection, sensor placement, and tuning support all matter when choosing the right manifold.\u003c\/p\u003e\n\n\u003cp\u003eFor Corvette, Camaro, Firebird, GTO, CTS-V, Holden, Chevrolet SSR, or LS-swapped projects using compatible \u003cstrong\u003eLS1\/LS2\/LS6 cathedral port heads\u003c\/strong\u003e, this \u003cstrong\u003eEVIL ENERGY LS engine intake manifold\u003c\/strong\u003e provides a practical upgrade path for performance street use, drift builds, track-day vehicles, and EFI LS projects. Final results depend on the full engine combination, throttle body, injectors, fuel system, camshaft, exhaust, tuning, and installation quality.\u003c\/p\u003e\n\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What engines does this LS EFI intake manifold fit?\u003c\/strong\u003e\u003cbr\u003e\nA: This intake manifold is designed for compatible GM LS Gen III or Gen IV engines equipped with LS1, LS2, or LS6 style cathedral port cylinder heads. Always confirm your cylinder head port shape before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Will this fit LS3 heads?\u003c\/strong\u003e\u003cbr\u003e\nA: No. LS3\/L92\/L99\/L76 style engines commonly use rectangular port heads, while this manifold is intended for LS1\/LS2\/LS6 style cathedral port heads.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Are fuel rails included?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. This LS EFI intake manifold includes fuel rails. Confirm injector length, O-ring size, fitting size, fuel pressure regulator setup, and fuel line routing before installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this a carburetor intake manifold?\u003c\/strong\u003e\u003cbr\u003e\nA: No. This is an EFI intake manifold for fuel-injected LS applications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What should I check before buying?\u003c\/strong\u003e\u003cbr\u003e\nA: Check cylinder head port shape, throttle body size, injector compatibility, fuel rail fittings, MAP\/IAT sensor needs, vacuum ports, hood clearance, gasket style, and tuning requirements before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does this intake manifold require tuning?\u003c\/strong\u003e\u003cbr\u003e\nA: EFI intake manifold changes may require tuning or calibration adjustments depending on the vehicle, throttle body, injectors, airflow changes, camshaft, and ECU setup.\u003c\/p\u003e","brand":"EVIL ENERGY","offers":[{"title":"Silver","offer_id":46169537282184,"sku":"EVBUH0007001","price":219.99,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":46169537314952,"sku":"EVBUH0007002","price":239.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0590\/5403\/0984\/files\/EVILENERGYLS1LS2LS6EFIIntakeManifoldwithFuelRails-Silver-7.6-m1.webp?v=1783419730","url":"https:\/\/www.ievilenergy.com\/products\/ls-efi-intake-manifold-fuel-rails-cathedral-port","provider":"EVILENERGY","version":"1.0","type":"link"}