{"product_id":"henkyo-accelerator-pump-discharge-nozzle-set-for-holley-style-4150-4160-4500-carburetors-4-piece-brass-031-033-035-037-with","title":"HENKYO Accelerator Pump Discharge Nozzle Set for Holley‑style 4150\/4160\/4500 Carburetors — 4‑piece brass .031\/.033\/.035\/.037 with","description":"\u003cstrong\u003eHENKYO's 4-piece Ho-*lley accelerator pump discharge nozzle set supplies four precision brass nozzles (0.031\", 0.033\", 0.035\", 0.037\") for 4150\/4160\/4500-style carburetors.\u003c\/strong\u003e\n\n\u003cp\u003eIf you tune or restore classic performance carburetors, correctly sized accelerator pump discharge nozzles are essential for crisp throttle response and proper fuel atomization. This HENKYO kit gives you a selection of four straight brass jets machined to close tolerances so you can match the nozzle orifice to engine needs or drivability preferences. Each order includes one of each diameter: 0.031\", 0.033\", 0.035\", and 0.037\", plus copper gaskets designed to form a secure seal when installed.\u003c\/p\u003e\n\n\u003ch3\u003eHow does choosing the right nozzle diameter affect throttle response?\u003c\/h3\u003e\n\u003cp\u003eNozzle size changes how much fuel is shot into the carburetor throat during accelerator pump action. Smaller orifices deliver less volume and a sharper, leaner squirt; larger orifices increase volume for richer bursts. Picking the correct size helps reduce hesitation, stumbling, or excessive richness when you open the throttle quickly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e0.031\" – leaner, for mild cam or low-load tuning\u003c\/li\u003e\n  \u003cli\u003e0.033\" – slight increase for balanced response\u003c\/li\u003e\n  \u003cli\u003e0.035\" – mid-range volume for moderate performance setups\u003c\/li\u003e\n  \u003cli\u003e0.037\" – richest option for big cams or high-load needs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and manufacture quality should I expect from this kit?\u003c\/h3\u003e\n\u003cp\u003eThe set uses brass nozzles that resist corrosion and conduct heat steadily, helping consistent fuel flow in varied operating conditions. Each jet is produced on a high-precision CNC lathe to hold tight tolerances, and the included copper gaskets form a reliable seal to prevent leaks and maintain pump effectiveness.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBrass construction for durability and corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eCNC-machined for accurate orifice dimensions\u003c\/li\u003e\n  \u003cli\u003eCopper gasket included to ensure a leak-free seating\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich carburetors and applications are compatible with this nozzle set?\u003c\/h3\u003e\n\u003cp\u003eThese straight accelerator pump jets are designed for common square-bore performance carbs—specifically models in the 4150, 4160, and 4500 families, plus many Holley-pattern 2300 variants. They work for rebuilds, jetting experiments, or swapping to tune transient fueling when modifying cam, intake, or exhaust components.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits 4150\/4160\/4500-style carburetors and compatible 2300 variants\u003c\/li\u003e\n  \u003cli\u003eUseful for carb rebuilds, dyno jetting, and street tuning\u003c\/li\u003e\n  \u003cli\u003eSold as a 4-piece set covering common pump sizes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is it to install and test different nozzle sizes?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward: remove the accelerator pump cover or bowl, swap the nozzle and gasket, then reassemble. Testing involves assessing throttle response and adjusting until the vehicle no longer hesitates or bogs on sudden throttle application. Keep a log of which size produces the best result for each engine setup.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSimple swap—no special tools beyond basic carburetor tools\u003c\/li\u003e\n  \u003cli\u003eTest by quick-throttle pulls at idle and part-throttle transitions\u003c\/li\u003e\n  \u003cli\u003eRecord results so you can revert or refine jetting choices\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The HENKYO Ho-*lley accelerator pump discharge nozzle kit is aimed at mechanics, restorers, and performance hobbyists working on Holley-pattern carburetors. If you rebuild carbs, experiment with jetting, or need replacement pump nozzles for 4150\/4160\/4500-style units, this brass four-pack offers a practical range of sizes to fine-tune transient fuel delivery without sourcing individual jets.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will these nozzles fit my Holley 4150 carburetor?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the set is made for 4150\/4160\/4500-style carburetors and compatible Holley-pattern 2300 units.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the kit include gaskets and how many pieces?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The kit contains four brass nozzles (0.031\", 0.033\", 0.035\", 0.037\") and includes copper gaskets for each nozzle.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"HENKYO","offers":[{"title":"Default Title","offer_id":48086792470686,"sku":"B0DPQFZH4L","price":63.44,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/henkyo-holley-nozzles-front-packaging.jpg?v=1785905367","url":"https:\/\/northtrailauto.ca\/products\/henkyo-accelerator-pump-discharge-nozzle-set-for-holley-style-4150-4160-4500-carburetors-4-piece-brass-031-033-035-037-with","provider":"North Trail Auto","version":"1.0","type":"link"}