{"product_id":"shlpdfm-carburetor-spacer-1-open-aluminum-1in-square-bore-fit-for-holley-edelbrock-3-8-vacuum-tube-hardware","title":"SHLPDFM Carburetor Spacer 1\" Open Aluminum — 1in Square-Bore Fit for Holley\/Edelbrock, 3\/8\" Vacuum Tube \u0026 Hardware","description":"\u003cp\u003e\u003cstrong\u003eSHLPDFM's 1-inch aluminum open carburetor spacer raises plenum volume and positions the carburetor to help optimize airflow for stronger high-rpm performance on square-bore Holley and Edelbrock setups.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your classic Chevy, Ford, or Mopar runs a square-bore Holley or Edelbrock carburetor and you want a durable, lightweight spacer to tune airflow characteristics, this 1\" open-design spacer is a direct, budget-friendly option. Crafted from corrosion-resistant aluminum, it ships as a complete kit with hardware, a 3\/8\" vacuum tube and plug so you can install it without scavenging extra parts.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this spacer change engine breathing at high RPM?\u003c\/h3\u003e\n\u003cp\u003eAn open 1\" spacer increases plenum volume and slightly changes the intake tract geometry, encouraging better high-rpm airflow and throttle response for many naturally aspirated V8 applications. It’s targeted at gains in the upper rev range rather than low-speed torque.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOpen center design enlarges plenum for improved top-end flow.\u003c\/li\u003e\n  \u003cli\u003eOne-inch thickness alters runner length subtly for higher-rpm tuning.\u003c\/li\u003e\n  \u003cli\u003eFits square-bore carburetors that benefit from increased volume.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this spacer fit my carburetor and engine manifold?\u003c\/h3\u003e\n\u003cp\u003eThis spacer is made for square-bore Holley and Edelbrock carburetors and will not fit spread-bore Holley or Rochester Quadrajet models. Ensure your manifold has a compatible bolt pattern and clearance for the 1\" height before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible: most Holley and Edelbrock square-bore carburetors.\u003c\/li\u003e\n  \u003cli\u003eNot compatible: Holley spread-bore and Quadra-jet carburetors.\u003c\/li\u003e\n  \u003cli\u003eIncludes bolts, washers, nuts, vacuum tube and plug for straightforward mounting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and hardware are included, and how durable is it?\u003c\/h3\u003e\n\u003cp\u003eThe spacer is machined from high-quality aluminum for light weight and corrosion resistance, suitable for varied operating temperatures. The package contains the spacer plus all necessary fasteners and a 3\/8\" vacuum tube so you can complete the installation without ordering extra components.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaterial: corrosion-resistant aluminum for long service life.\u003c\/li\u003e\n  \u003cli\u003eThickness: precisely 1\" for consistent tuning effect.\u003c\/li\u003e\n  \u003cli\u003eKit includes: spacer, bolts, washers, nuts, 3\/8\" vacuum tube and plug.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow difficult is the installation and what should I check?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward for anyone familiar with carburetor removal and installation; basic hand tools suffice. Verify gasket condition, manifold flatness and vacuum port routing to avoid leaks and ensure the supplied vacuum tube reaches the intended connection.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBasic hand tools required—no special equipment.\u003c\/li\u003e\n  \u003cli\u003eReplace intake and carburetor gaskets for a proper seal.\u003c\/li\u003e\n  \u003cli\u003eConfirm vacuum tube length and routing before final assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this product is for: Enthusiasts and mechanics running square-bore Holley or Edelbrock carburetors on Chevy, Ford, or Mopar V8s who want a simple, durable spacer to tune high-rpm performance and intake sound. If you need gains at the top end, want a repeatable one-inch stack-up, and appreciate a complete mounting kit, this SHLPDFM spacer delivers a cost-effective, easy-to-install option. Avoid this spacer if your carburetor is a spread-bore or Quadra-jet type; check fitment details before purchase.\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: Does this spacer fit spread-bore carburetors?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. It fits square-bore Holley and Edelbrock carburetors only, not Holley spread-bore or Quadra-jet models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is hardware included for installation?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit includes bolts, washers, nuts, a 3\/8\" vacuum tube and a plug for complete installation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"SHLPDFM","offers":[{"title":"Default Title","offer_id":48082897502366,"sku":"B0B8Z6FYG7","price":55.85,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/shlpdfm-spacer-front-view.jpg?v=1785818720","url":"https:\/\/northtrailauto.ca\/products\/shlpdfm-carburetor-spacer-1-open-aluminum-1in-square-bore-fit-for-holley-edelbrock-3-8-vacuum-tube-hardware","provider":"North Trail Auto","version":"1.0","type":"link"}