{"product_id":"coming-soon-chop-gun-rad-6-2l-ls-diy-full-build-kit","title":"COMING SOON - Chop Gun - RAD 6.2L LS DIY Full Build Kit","description":"\u003cdiv class=\"text-base my-auto mx-auto [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--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\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" dir=\"auto\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cdiv class=\"\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-15 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--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\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv dir=\"auto\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003ch2 dir=\"auto\" class=\"PDq2pG_selectionAnchorContainer\"\u003e\n\u003cspan role=\"text\"\u003eDo you have the need? The need for speed? Meet RAD’s \u003cem\u003eChop Gun\u003c\/em\u003e DIY Full Build Kit.\u003c\/span\u003e\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003ch1 dir=\"auto\"\u003eChop Gun — RAD DIY Full Build Kit\u003c\/h1\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eTransform your 6.2L into a RAD Chop Gun engine!\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eStarting at $4,999\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eAlready have a solid 6.2L LS? Chop Gun brings together the cam, supporting valvetrain, fuel system, oiling components, engine management, and RAD tune to give it a new personality. It has the chop and throttle response you came for, backed by a matched combination of parts instead of a pile of separate purchases.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThis is also a chance to take care of an engine whose history you may not know. The kit includes new lifters, a full top-end gasket and seal package, head bolts, selected sensors, and other components worth addressing while the engine is apart. Engines with factory DoD get the parts needed to remove it as part of the build.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eThe package covers four major jobs:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGive it Chop Gun character.\u003c\/strong\u003e The RAD-specified camshaft is paired with the springs, pushrods, lifters, timing components, and fueling selected for the combination.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefresh the top end.\u003c\/strong\u003e New head gaskets, valve-stem seals, head bolts, lifters, and upper-engine seals make the required head removal an opportunity to service the engine properly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpdate the oiling system. \u003c\/strong\u003eA new standard-volume, standard-pressure oil pump and complete rear-sump pan package provide a fresh, matched foundation for the build.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMake it run as one package.\u003c\/strong\u003e A standalone ECU, Gen IV LS engine harness, electronic-throttle connections, sensors, and RAD tune bring the mechanical and electronic pieces together.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003eYou supply a mechanically sound 6.2L engine and do the work yourself or with your chosen shop. RAD supplies the matched parts and calibration to build your own \u003cstrong\u003eChop Gun\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2 dir=\"auto\"\u003eWhat’s Included in the Chop Gun Build Kit\u003c\/h2\u003e\n\u003ch3 dir=\"auto\"\u003eCamshaft, Valvetrain \u0026amp; DoD Elimination\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRAD-specified Chop Gun camshaft\u003c\/li\u003e\n\u003cli\u003eNew camshaft mounting bolts\u003c\/li\u003e\n\u003cli\u003eCamshaft retainer and bolt kit\u003c\/li\u003e\n\u003cli\u003eNew performance timing set\u003c\/li\u003e\n\u003cli\u003eTiming-chain damper\u003c\/li\u003e\n\u003cli\u003eNew hydraulic roller lifters\u003c\/li\u003e\n\u003cli\u003eNew lifter guide trays\u003c\/li\u003e\n\u003cli\u003eValve-spring kit matched to the camshaft\u003c\/li\u003e\n\u003cli\u003eMatched pushrods\u003c\/li\u003e\n\u003cli\u003eNon-VVT front timing cover with cam-position sensor, wiring, gasket, and installation hardware\u003c\/li\u003e\n\u003cli\u003eReplacement valley cover for engines equipped with DoD\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eCylinder-head removal is required\u003c\/strong\u003e to install the new lifters and guide trays. If your engine has DoD, the included components allow its factory lifter hardware to be removed during that work.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eCylinder-Head \u0026amp; Top-End Service\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eComplete top-end gasket and seal kit, including new head gaskets and valve-stem seals\u003c\/li\u003e\n\u003cli\u003eValve-cover gaskets and other upper-engine seals supplied with the top-end kit\u003c\/li\u003e\n\u003cli\u003eNew cylinder-head bolts for reassembly\u003c\/li\u003e\n\u003cli\u003eRAD-logo valve covers with ignition-coil mounting provisions\u003c\/li\u003e\n\u003cli\u003eNew valve-cover mounting bolts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003eThe kit reuses your serviceable stock cylinder heads. Head machining, replacement heads, and short-block rebuilding are not part of the base package.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eOiling \u0026amp; Rear-Sump Pan Package\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNew standard-volume, standard-pressure oil pump\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eRear-sump oil pan with oil-filter mounting provision\u003c\/li\u003e\n\u003cli\u003ePickup matched to the supplied pan\u003c\/li\u003e\n\u003cli\u003eOil-pan gasket and installation hardware\u003c\/li\u003e\n\u003cli\u003eOil dipstick\u003c\/li\u003e\n\u003cli\u003eEngine oil and oil filter for customer installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003eThe \u003cstrong\u003erear-sump pan is the standard configuration\u003c\/strong\u003e. If your chassis calls for a front-sump or another pan arrangement, contact RAD before ordering so the oiling package can be specified for your build.\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eFuel \u0026amp; Ignition Service\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFuel rails\u003c\/li\u003e\n\u003cli\u003eMatched set of fuel injectors\u003c\/li\u003e\n\u003cli\u003eTwo sets of spark plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"auto\"\u003eECU, Engine Harness \u0026amp; Sensors\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStandalone engine ECU with support for the OEM LS3 electronic throttle\u003c\/li\u003e\n\u003cli\u003eTerminated Gen IV LS engine harness\u003c\/li\u003e\n\u003cli\u003eElectronic-throttle and accelerator-pedal adapter harnesses\u003c\/li\u003e\n\u003cli\u003eInjector, alternator, and applicable sensor adapter harnesses supplied with the ECU package\u003c\/li\u003e\n\u003cli\u003eManual-transmission speed-sensor harness supplied with the ECU package\u003c\/li\u003e\n\u003cli\u003eWideband oxygen sensor and installation fitting\u003c\/li\u003e\n\u003cli\u003eIntake-air-temperature sensor and installation fitting\u003c\/li\u003e\n\u003cli\u003eFlex-fuel sensor\u003c\/li\u003e\n\u003cli\u003eNew crank-position sensor\u003c\/li\u003e\n\u003cli\u003eMAP sensor\u003c\/li\u003e\n\u003cli\u003eEngine coolant-temperature sensor\u003c\/li\u003e\n\u003cli\u003eFuel-pressure sensor\u003c\/li\u003e\n\u003cli\u003eOil-pressure sensor\u003c\/li\u003e\n\u003cli\u003eOil-temperature sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"auto\"\u003eRAD Chop Gun Tune\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThe included ECU receives a RAD Chop Gun calibration developed for the supplied camshaft, injectors, sensors, and engine-management package. It covers startup, idle, throttle response, normal driving, flex-fuel operation, and full-throttle performance. The installer should verify the completed installation and calibration in the vehicle before driving.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eThe customer’s sound 6.2L block, rotating assembly, cylinder heads, intake manifold, throttle body, rocker arms, ignition components, and compatible accessories provide the starting point for the build.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 dir=\"auto\"\u003eStarting Engine and Vehicle Requirements\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThe standard Chop Gun DIY Full Build Kit is specified around a sound, largely stock Gen IV 6.2L LS. Before ordering, the following are assumed:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eA complete, serviceable Gen IV 6.2L engine core.\u003c\/strong\u003e The block, crankshaft, connecting rods, pistons, rocker arms, ignition coils, and other reused components must be suitable for continued service. Engines with or without VVT and\/or DoD are acceptable. Tell RAD which systems your engine has so the correct conversion components are supplied.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGood underlying engine condition.\u003c\/strong\u003e Check compression, leakdown, and oil pressure before disassembly where possible. The core must be free of material defects, including damaged cylinder walls, bearing damage, cracks, overheating damage, and oil or coolant contamination. Machine work and short-block repairs are not included.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStock, unmodified OEM rectangular-port cylinder heads, typically 821 or 823 castings.\u003c\/strong\u003e The heads must not have been milled, ported, or otherwise altered, and their decks, valves, and guides must be serviceable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAn OEM LS3 car-style intake manifold and OEM LS3 electronic throttle body.\u003c\/strong\u003e Both are assumed to be supplied with your engine or sourced separately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA compatible electronic accelerator pedal and vehicle-side systems.\u003c\/strong\u003e The ECU package includes the specified pedal adapter harness, but the pedal and the vehicle’s fuel supply, cooling, exhaust, charging, starting, and other installation systems must be compatible and supplied separately as needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoom for the included rear-sump oil pan.\u003c\/strong\u003e Confirm chassis, crossmember, steering, and ground-clearance requirements before ordering. Other pan configurations can be discussed with RAD.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAn installer equipped for head-off engine work.\u003c\/strong\u003e Installation includes removing the cylinder heads, changing the camshaft and lifters, fitting the valve springs and oiling components, and checking clearances and operation before startup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eHave a different combination?\u003c\/strong\u003e Contact RAD before ordering if your engine, heads, intake, throttle body, pedal, or vehicle installation differs from these assumptions. RAD can accommodate many configurations once the starting point is clear.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3 dir=\"auto\"\u003eThe Parts Behind the RAD Badge\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eTypical component brands across RAD packages include BTR, Texas Speed, Cam Motion, AFR, PRC, Mahle, ARP, GM Performance, Engine Pro, Fuel Injector Clinic, Bosch, Haltech, and MaxxECU. For turbo systems, that roster also includes Garrett, BorgWarner, and Turbosmart. RAD favors American-made performance hardware and proven specialists throughout each combination. Every part is selected for quality, durability, and fit, so you can have confidence in both the components and the RAD engineering behind them.\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\/section\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\/div\u003e","brand":"RAD","offers":[{"title":"Default Title","offer_id":46531863642169,"sku":null,"price":4999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0809\/8512\/9017\/files\/Chop_Gun_Logo.png?v=1789588396","url":"https:\/\/rad-power.com\/products\/coming-soon-chop-gun-rad-6-2l-ls-diy-full-build-kit","provider":"RAD","version":"1.0","type":"link"}