{"title":"Jets, Air Bleeds, Boosters - Holley Tuning Parts","description":"","products":[{"product_id":"holley-main-jet-kit-sizes-60-through-to-69","title":"Holley Main Jet Kit - Sizes 60 through to 69","description":"\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e10 Pairs of Jets\u003c\/strong\u003e - Includes jet sizes from 60 to 69 for tuning flexibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Machined\u003c\/strong\u003e - High-quality brass jets for consistent fuel metering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuits Holley,Quickfuel,Barry Grant, Carburettors\u003c\/strong\u003e - Compatible with a wide range of  2 and 4 barrel carbs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis Holley main jet kit includes 10 matched pairs of main jets, ranging from size 60 to 69. Ideal for tuning your Holley carburettor for performance, economy, or altitude changes. These jets are precision machined to ensure consistent flow and easy installation. Not Cheap China Knock Offs  That Are Not Pin Sized \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eContents:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e10 x Jet Pairs (Sizes 60 to 69)\u003c\/li\u003e\n\u003cli\u003ePackaged in a compartmentalised case for easy storage\u003c\/li\u003e\n\u003cli\u003eGenuine Holley Jets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePerfect for racers, tuners, and DIY enthusiasts looking to optimise fuel delivery on Holley-equipped engines.\u003c\/p\u003e","brand":"Holley","offers":[{"title":"Default Title","offer_id":42473402826849,"sku":"HJK-60","price":125.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0568\/2282\/5057\/files\/holley_main_jets.png?v=1760256829"},{"product_id":"650-750-hp-body-annular-boosters","title":"Holley 650\/700\/750 HP Body Annular Boosters","description":"\u003cul\u003e\n\u003cli\u003eUpgrade your 650, 700, or 750 CFM Holley Double Pumper to a race-ready HP main body\u003c\/li\u003e\n\u003cli\u003eBoosts airflow, torque, and horsepower by removing choke tower restrictions\u003c\/li\u003e\n\u003cli\u003eFactory-calibrated for immediate performance gains across a wide range of setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis Holley HP retrofit kit transforms your existing Holley Double Pumper carburettor into a high-performance unit with modern airflow technology. The new aluminium HP main body features annular boosters and eliminates the restrictive choke horn, enabling smoother airflow and improved throttle response. Installation is simple with basic tools, and all required parts are included in the kit. Ideal for racers or street enthusiasts who want to unlock more power without a full carburettor replacement.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFits Holley Double Pumper models: 0-4777 (650 CFM), 0-4778 (700 CFM), 0-4779 \u0026amp; 0-76751 (750 CFM)\u003c\/li\u003e\n\u003cli\u003eMain body material: Lightweight aluminium\u003c\/li\u003e\n\u003cli\u003eFinish: Shiny polished aluminium\u003c\/li\u003e\n\u003cli\u003eBooster type: Annular\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThis HP main bodies come with a baseline air bleed calibration and are set up for 4 corner idle.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003eChoke tower and air horn: Removed for maximum airflow\u003c\/li\u003e\n\u003cli\u003eApplication: Suits a wide range of street and race applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e#73 Idle Air Bleed\u003c\/p\u003e\n\u003cp\u003e#33 High Speed Air Bleed\u003c\/p\u003e\n\u003cp\u003e#35 Pump nozzles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Gator","offers":[{"title":"Default Title","offer_id":42577953816673,"sku":"134-300","price":440.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0568\/2282\/5057\/files\/650-750-HP-Body-Annular-Boosters-134-300-img11.png?v=1762645092"},{"product_id":"650-750-hp-body-dropleg-boosters","title":"Holley 650,700,750 HP Body Dropleg Boosters","description":"\u003cul\u003e\n\u003cli\u003eConverts your 650 ,700, 750 CFM Holley Double Pumper into a high-performance HP main body with dropleg boosters\u003c\/li\u003e\n\u003cli\u003eEliminates choke tower to reduce turbulence and boost airflow\u003c\/li\u003e\n\u003cli\u003eFactory-assembled with gaskets and main jets included for simple installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUpgrade your street or strip Holley Double Pumper to full HP specification with this 650\/ 700\/ 750 CFM aluminium main body retrofit kit featuring dropleg boosters. Designed to fit 0-4777, 0-4778, 0-4779C, 0-4779S, 0-4779SA, and 0-76751 models, this kit delivers more torque, horsepower, and smoother airflow by removing the choke tower and air horn. Installation is straightforward using basic tools, and the pre-calibrated setup ensures instant gains in drivability and throttle response. \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eHolley 750 CFM HP Main Body is a great upgrade from standard flow main body. This main body will work in place of any 650-800 CFM mechanical secondary carburetor. It comes with .160 Step boosters which help with flow and throttle response. The main body will come as pictured with high flow nozzle screws and #35 pump nozzles. The air bleeds are #73 for the Idle air and #31 for the high speed. Both Nozzles\u003c\/span\u003e\u003cspan\u003e and Air Bleeds\u003c\/span\u003e\u003cspan\u003e are available to purchase for tuning.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCFM:650, 700, 750\u003c\/li\u003e\n\u003cli\u003eSuits Holley Double Pumper models:0-4777, 0-4778, 0-4779C, 0-4779S, 0-4779SA, 0-76751\u003c\/li\u003e\n\u003cli\u003eMain body material: Aluminium\u003c\/li\u003e\n\u003cli\u003eFinish: Shiny aluminium\u003c\/li\u003e\n\u003cli\u003eBooster style: Dropleg\u003c\/li\u003e\n\u003cli\u003eChoke: Choke tower and air horn deleted\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e#73 Idle Air Bleed\u003c\/p\u003e\n\u003cp\u003e#31 High Speed Air Bleed\u003c\/p\u003e\n\u003cp\u003e#35 Pump nozzles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eInstallation: Simple, uses common hand tools\u003c\/li\u003e\n\u003cli\u003ePre-calibrated: Yes, for a wide range of applications\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Gator","offers":[{"title":"Default Title","offer_id":42577953849441,"sku":"134-300SA","price":410.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0568\/2282\/5057\/files\/650-750-HP-Body-Dropleg-Boosters-HOL-134-300SA.png?v=1762649278"},{"product_id":"holley-main-jet-repair-kit-14-32","title":"Holley Main Jet Thread Repair Kit 14-32","description":"\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eComplete thread repair kit for Holley Main Jets (14-32 thread size)\u003c\/li\u003e\n\u003cli\u003eIncludes STI tap, 15 inserts, magnetic tang break tool, and drill bit\u003c\/li\u003e\n\u003cli\u003ePerfect for restoring damaged or stripped carburettor threads\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis Holley Main Jet Repair Kit is a specialised thread restoration kit designed to repair damaged 14-32 threads in Holley carburettor Metering Blocks. With premium tools and materials included, this kit is ideal for high-performance carb rebuilds, race prep, or workshop use.\u003c\/p\u003e\n\u003cp\u003eThe kit contains 15 stainless steel 1.5D inserts, a high speed steel STI tap, a combo tap and insert installation tool, a magnetic tang break tool, and the correct drill bit for precise hole sizing.\u003c\/p\u003e\n\u003ch3\u003eKit Contents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e15 x 1.5D stainless steel inserts\u003c\/li\u003e\n\u003cli\u003eMagnetic tang break tool\u003c\/li\u003e\n\u003cli\u003eCombo tap and insert installation tool\u003c\/li\u003e\n\u003cli\u003eHigh speed steel intermediate STI tap\u003c\/li\u003e\n\u003cli\u003eDrill bit (matched to thread size)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Gator","offers":[{"title":"Default Title","offer_id":42577954635873,"sku":"HCK-14-32","price":75.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0568\/2282\/5057\/files\/hck-14-32-holley-main-jet-repair-kit-img1.png?v=1762645045"},{"product_id":"holley-main-jet-kit-size-50-to-59","title":"Holley Main Jet Kit Size 50 to 59","description":"\u003cul\u003e\n  \u003cli\u003eGenuine Holley main jet set ranging from size 50 to 59\u003c\/li\u003e\n  \u003cli\u003eIdeal for tuning and jetting Holley 2 barrel and 4 barrel carburettors\u003c\/li\u003e\n  \u003cli\u003ePrecision-machined for consistent fuel delivery and performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\nThis Holley main jet set includes ten pairs of jets, covering sizes 50 through 59. Perfect for tuners and engine builders, this kit allows precise tuning of air-fuel ratios across a wide range of engine setups. Each jet is stamped with its size for easy identification and sorted for quick access in your workshop or track toolbox.\n\u003c\/p\u003e\n\n\u003cp\u003e\nCompatible with most Holley performance carburettors including 2300, 4150, 4160, and HP series. A must-have for serious tuning, dyno testing, or adapting to changes in altitude or fuel quality.\n\u003c\/p\u003e\n\n\u003ch3\u003eContents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eJet sizes included: 50, 51, 52, 53, 54, 55, 56, 57, 58, 59\u003c\/li\u003e\n  \u003cli\u003e2 jets per size (20 jets total)\u003c\/li\u003e\n  \u003cli\u003eEach jet clearly stamped with size\u003c\/li\u003e\n  \u003cli\u003eSupplied in organised storage case\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Holley","offers":[{"title":"Default Title","offer_id":42577954668641,"sku":"HJK-50","price":125.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0568\/2282\/5057\/files\/HJK-50-holley-main-jets-50-to-59.png?v=1762769840"},{"product_id":"holley-main-jet-kit-size-70-to-79","title":"Holley Main Jet Kit Size 70 to 79","description":"\u003cul\u003e\n\u003cli\u003eComprehensive jet set covering Holley sizes 70 to 79\u003c\/li\u003e\n\u003cli\u003ePerfect for performance tuning across a wide range of engines\u003c\/li\u003e\n\u003cli\u003ePrecision machined and clearly stamped for accurate fuel delivery\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis genuine Holley main jet set includes ten matched pairs of jets, sized 70 through 79, to help dial in the perfect air-fuel ratio for your application. Designed for Holley 2300, 4150, 4160 and HP series carburettors, these jets are ideal for fine-tuning on the street, strip or dyno. \u003cmeta charset=\"utf-8\"\u003eThese are precision manufactured, they are NOT cheap china knock-offs that are not pin-sized. \u003c\/p\u003e\n\u003cp\u003eThe set is neatly packed in a reusable storage case for quick access and organisation. Each jet is precision drilled and marked, making it easy to identify and swap during tuning.\u003c\/p\u003e\n\u003ch3\u003eContents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eJet sizes included: 70, 71, 72, 73, 74, 75, 76, 77, 78, 79\u003c\/li\u003e\n\u003cli\u003e2 jets per size (20 jets total)\u003c\/li\u003e\n\u003cli\u003eReusable storage case included\u003c\/li\u003e\n\u003cli\u003eCompatible with most Holley performance carburettors\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Holley","offers":[{"title":"Default Title","offer_id":42577954734177,"sku":"HJK-70","price":125.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0568\/2282\/5057\/files\/HJK-70-holley-main-jets-70-to-79.png?v=1762769815"},{"product_id":"holley-main-jet-kit-size-80-to-89","title":"Holley Main Jet Kit Size 80 to 89","description":"\u003cul\u003e\n\u003cli\u003eJet kit includes Holley sizes 80 to 89 for tuning flexibility\u003c\/li\u003e\n\u003cli\u003eIdeal for high-performance and race applications\u003c\/li\u003e\n\u003cli\u003ePrecision stamped brass jets in a labelled storage case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis set of Holley main jets includes ten pairs of jets, ranging from size 80 through 89. It is the ideal choice for tuners and racers who need accurate fuel delivery at higher performance levels. Whether you're chasing consistency at the track or fine-tuning on the dyno, this kit has you covered. \u003cmeta charset=\"utf-8\"\u003eThese are precision manufactured, they are NOT cheap china knock-offs that are not pin-sized. \u003c\/p\u003e\n\u003cp\u003eEach jet is precision drilled and clearly stamped for identification. The kit comes packaged in a durable storage case to keep your parts organised and ready for quick swaps.\u003c\/p\u003e\n\u003ch3\u003eContents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eJet sizes included: 80, 81, 82, 83, 84, 85, 86, 87, 88, 89\u003c\/li\u003e\n\u003cli\u003e2 jets per size (20 jets total)\u003c\/li\u003e\n\u003cli\u003eReusable compartment case included\u003c\/li\u003e\n\u003cli\u003eCompatible with Holley 2300, 4150, 4160, HP and Ultra carburettors\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Holley","offers":[{"title":"Default Title","offer_id":42577954766945,"sku":"HJK-80","price":125.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0568\/2282\/5057\/files\/HJK-80-holley-main-jets-80-to-89.png?v=1762769791"},{"product_id":"holley-main-jet-kit-size-90-to-99","title":"Holley Main Jet Kit Size 90 to 99","description":"\u003cul\u003e\n\u003cli\u003eJet kit includes Holley sizes 90 to 99 for maximum tuning range\u003c\/li\u003e\n\u003cli\u003ePerfect for heavily modified or high-fuel-demand engines\u003c\/li\u003e\n\u003cli\u003ePrecision brass jets organised in a reusable storage case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis set of genuine Holley main jets features sizes 90 through 99, making it an essential tuning solution for high-horsepower or race-built engines. Whether you're compensating for forced induction, alcohol fuels, or heavy mods, this kit gives you the headroom you need to fine-tune your air-fuel ratio. \u003cmeta charset=\"utf-8\"\u003eThese are precision manufactured, they are NOT cheap china knock-offs that are not pin-sized. \u003c\/p\u003e\n\u003cp\u003eManufactured from high-quality brass and stamped for easy identification, each jet ensures consistent performance. The set is housed in a durable compartment case for fast access in the workshop or at the track.\u003c\/p\u003e\n\u003ch3\u003eContents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eJet sizes included: 90, 91, 92, 93, 94, 95, 96, 97, 98, 99\u003c\/li\u003e\n\u003cli\u003e2 jets per size (20 jets total)\u003c\/li\u003e\n\u003cli\u003eReusable compartment case included\u003c\/li\u003e\n\u003cli\u003eCompatible with Holley 2300, 4150, 4160, HP and Ultra carburettors\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Holley","offers":[{"title":"Default Title","offer_id":42577954799713,"sku":"HJK-90","price":125.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0568\/2282\/5057\/files\/HJK-90-holley-main-jets-90-to-99.png?v=1762769765"},{"product_id":"holley-main-jets-pair-sizes-50-thru-90","title":"Holley Main Jets Pair Choose Sizes 50 thru 99","description":"\u003cul\u003e\n\u003cli\u003eSold as a matched pair for consistent tuning across dual fuel bowls\u003c\/li\u003e\n\u003cli\u003ePrecision Holley main jets available in sizes 50 through 99\u003c\/li\u003e\n\u003cli\u003eSuits Holley 2300, 4150, 4160 and most modular Holley carburettors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese Holley main jets are supplied as a matched pair, ensuring both primary and secondary metering blocks (where fitted) receive identical fuel calibration. Main jets are the core component that determines fuel delivery at cruise and wide-open throttle, making correct sizing essential for drivability, economy and performance. Manufactured to Holley specifications, these jets provide precise fuel flow and maintain consistency across heat cycles and long-term use. Suitable for Holley modular carburettors including 2300 two-barrels, and 4150 and 4160 four-barrel models used on street, strip and marine applications. Available in sizes 50 through 99 to suit both stock and modified engines.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProduct: Holley Main Jets (Pair)\u003c\/li\u003e\n\u003cli\u003eJet Range: Sizes 50 to 99\u003c\/li\u003e\n\u003cli\u003eJet Type: Main metering jet\u003c\/li\u003e\n\u003cli\u003eCompatible Carburettors:\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eHolley 2300 series (2 barrel)\u003c\/li\u003e\n\u003cli\u003eHolley 4150 series\u003c\/li\u003e\n\u003cli\u003eHolley 4160 series\u003c\/li\u003e\n\u003cli\u003eMost modular-style Holley carburettors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eMaterial: Brass\u003c\/li\u003e\n\u003cli\u003eQuantity: 2 jets (matched pair)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInclusions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2 x Holley main jets in selected 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2300 4150 4160 Annular Booster Insert 12 Hole .500 I.D. Black QFT AED CCS","description":"\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnnular booster inserts with 12 discharge holes\u003c\/strong\u003e to improve fuel atomisation and throttle response\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.500 inch internal diameter\u003c\/strong\u003e suitable for performance Holley-style carburettors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBillet construction\u003c\/strong\u003e supplied as a complete set of four inserts and four banjos\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese annular booster inserts are designed to upgrade or replace existing boosters in Holley-style carburettors, improving fuel atomisation and drivability across the rpm range. Each insert features twelve precisely sized discharge holes to deliver a finer fuel spray, helping reduce flat spots and improve throttle response.\u003c\/p\u003e\n\u003cp\u003eThe inserts press into the booster banjo and are supplied with matching billet annular booster banjos. Installation requires a swedging booster installation tool to correctly seat and secure the banjos.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert internal diameter:\u003c\/strong\u003e .500 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDischarge holes:\u003c\/strong\u003e 12 holes, .062 inch each\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePress-in surface diameter:\u003c\/strong\u003e .80 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall insert length:\u003c\/strong\u003e .88 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Billet aluminium\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eKit contents:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e4 x annular booster inserts\u003c\/li\u003e\n\u003cli\u003e4 x annular booster banjos\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e A swedging booster installation tool is required for installation, or contact us for fitting service. Always confirm compatibility with your carburettor before purchase.\u003c\/p\u003e","brand":"Holley","offers":[{"title":"Default Title","offer_id":42955950981217,"sku":"HP-45291B","price":185.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0568\/2282\/5057\/files\/HP-45291S_Holley_QFT_AED_CCS_Billet_Annular_Booster_Insert_12_Hole_.500_I.D._Black_b48dff31-b87e-4b3c-b16a-682ee3f64779.png?v=1769506337"},{"product_id":"holley-2300-4150-4160-annular-booster-insert-12-hole-500-i-d-silver-qft-aed-ccs","title":"Holley 2300 4150 4160 Annular Booster Insert 12 Hole .500 I.D. Silver QFT AED CCS","description":"\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnnular booster inserts with 12 discharge holes\u003c\/strong\u003e to improve fuel atomisation and throttle response\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e.500 inch internal diameter\u003c\/strong\u003e suitable for performance Holley-style carburettors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBillet construction\u003c\/strong\u003e supplied as a complete set of four inserts and four banjos\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese annular booster inserts are designed to upgrade or replace existing boosters in Holley-style carburettors, improving fuel atomisation and drivability across the rpm range. Each insert features twelve precisely sized discharge holes to deliver a finer fuel spray, helping reduce flat spots and improve throttle response.\u003c\/p\u003e\n\u003cp\u003eThe inserts press into the booster banjo and are supplied with matching billet annular booster banjos. Installation requires a swedging booster installation tool to correctly seat and secure the banjos.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert internal diameter:\u003c\/strong\u003e .500 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDischarge holes:\u003c\/strong\u003e 12 holes, .062 inch each\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePress-in surface diameter:\u003c\/strong\u003e .80 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall insert length:\u003c\/strong\u003e .88 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Silver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Billet aluminium\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eKit contents:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e4 x annular booster inserts\u003c\/li\u003e\n\u003cli\u003e4 x annular booster banjos\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e A swedging booster installation tool is required for installation, or contact us for fitting service. Always confirm compatibility with your carburettor before purchase.\u003c\/p\u003e","brand":"Holley","offers":[{"title":"Default Title","offer_id":42955951767649,"sku":"HP-45291S","price":185.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0568\/2282\/5057\/files\/HP-45291S_Holley_QFT_AED_CCS_Billet_Annular_Booster_Insert_12_Hole_.500_I.D._Silver_a8873a00-32f7-4ace-92c5-a9bac0b4d6aa.png?v=1769506311"},{"product_id":"holley-main-jet-extension-122-5000","title":"Holley Main Jet Extension 122-5000","description":"\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelps control fuel uncovering\u003c\/strong\u003e - Used with secondary main jets during hard acceleration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrag strip useful part\u003c\/strong\u003e - Designed to help maintain fuel pickup as fuel moves to the rear of the bowl.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRequires a notched float\u003c\/strong\u003e - Must be used with a compatible notched float.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eHolley 122-5000 is a main jet extension for secondary main jet applications. Holley notes it can help prevent the jets from being uncovered as fuel rushes to the back of the bowl during extreme acceleration. It is commonly used in strip or hard launch setups and requires a notched float.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart Number: 122-5000\u003c\/li\u003e\n\u003cli\u003eBrand: Holley\u003c\/li\u003e\n\u003cli\u003eProduct Type: Main jet extension Qty 2\u003c\/li\u003e\n\u003cli\u003eUse: Secondary main jet applications\u003c\/li\u003e\n\u003cli\u003eInstallation Note: Requires notched float\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePart 122-5000 is a Holley main jet extension for secondary main jet applications on performance carburettors. 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