{"product_id":"spectre-4-90-intake-boot-black-4-od-pvc-elbow-with-stainless-clamps-for-tight-engine-bays","title":"Spectre 4\" 90° Intake Boot — Black 4\" OD PVC Elbow with Stainless Clamps for Tight Engine Bays","description":"\u003cstrong\u003eSpectre Performance 9781 is a black 4-inch outside-diameter PVC 90° intake boot that joins two 4\" OD intake tubes and includes two stainless-steel worm-gear clamps.\u003c\/strong\u003e\n\n\u003cp\u003eThis compact 90-degree coupler is designed for simple, reliable connections between two 4\" outside-diameter air intake tubes in naturally aspirated applications. The molded PVC elbow gives a smooth airflow path while its small footprint helps route intake tubing where straight runs won't fit. Two stainless-steel worm-gear hose clamps are supplied so the boot can be mounted and sealed quickly without additional hardware.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this boot fit into tight engine-bay spaces?\u003c\/h3\u003e\n\u003cp\u003eThe 90° bend lets you redirect a 4\" intake run without long, angled tubing or custom fabrication. Because it’s a one-piece elbow, it reduces the need for multiple short sections and fittings that consume space and add leak points.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompact 90-degree shape for tight clearances\u003c\/li\u003e\n  \u003cli\u003eOne-piece PVC construction minimizes bulk\u003c\/li\u003e\n  \u003cli\u003eReduces number of joints compared with multiple straight couplers\u003c\/li\u003e\n  \u003cli\u003eSupplied clamps fasten quickly to save installation room\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this work with my 4\" intake tubing or components?\u003c\/h3\u003e\n\u003cp\u003eThe boot is made to join components that measure 4\" outside diameter. It seals externally onto the tube OD, so verify your tubing uses a 4.00\" outside measurement rather than a 4\" internal diameter spec. Ideal for many aftermarket and custom intake setups where wall thickness and OD are the fitting reference.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConnects two 4\" OD tubes or components directly\u003c\/li\u003e\n  \u003cli\u003eNot size-compatible if your tubing is specified by inner diameter only\u003c\/li\u003e\n  \u003cli\u003eUse calipers to confirm 4.00\" outside diameter before buying\u003c\/li\u003e\n  \u003cli\u003eWorks well with common custom intake tubing and silicone hoses sized by OD\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and secure is the connection?\u003c\/h3\u003e\n\u003cp\u003eThe elbow is molded from PVC for a balance of rigidity and slight flex to accommodate clamp pressure. Two stainless-steel worm-gear hose clamps are included to create a firm mechanical seal around the tube OD and resist loosening from vibration in normal driving conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePVC body resists common road heat and splashes\u003c\/li\u003e\n  \u003cli\u003eStainless-steel worm-gear clamps resist corrosion for longer life\u003c\/li\u003e\n  \u003cli\u003eClamps provide adjustable, repeatable tightening torque\u003c\/li\u003e\n  \u003cli\u003eSingle-piece design reduces joint count and leak potential\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre there situations where I should avoid using this boot?\u003c\/h3\u003e\n\u003cp\u003eThis coupler is intended for naturally aspirated systems and low-pressure intake uses. It is not recommended for turbocharged or supercharged applications where sustained positive boost pressures require reinforced or pressure-rated couplers.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUnsuitable for pressurized boost systems (turbo\/supercharged)\u003c\/li\u003e\n  \u003cli\u003eChoose reinforced or high-pressure silicone boots for boosted engines\u003c\/li\u003e\n  \u003cli\u003eBest used in cold-air or short-run intake plumbing in NA vehicles\u003c\/li\u003e\n  \u003cli\u003eInspect clamps and fittings periodically in high-vibration environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Spectre Performance 9781 fits DIY mechanics, custom fabricators, and enthusiasts who need a straightforward 90-degree 4\" OD connection in non-boosted intake systems. If you want a low-cost, easy-to-install elbow supplied with corrosion-resistant clamps for typical engine-bay routing, this PVC coupler is a practical choice. Avoid it if your setup operates under continuous boost pressure or requires a reinforced high-temperature silicone elbow.\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: Is the Spectre 9781 suitable for turbocharged engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. This PVC coupler is not recommended for turbocharged or supercharged engines—use pressure-rated reinforced couplers instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What diameter tubing does this boot accept?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It fits components with a 4.00\" outside diameter; confirm your tubing's OD rather than its ID before installing.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Spectre","offers":[{"title":"Default Title","offer_id":67587512991929,"sku":"B001OMM6WS","price":87.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/spectre-9781-front-view-black-90deg-boot.jpg?v=1790511246","url":"https:\/\/redleafauto.ca\/products\/spectre-4-90-intake-boot-black-4-od-pvc-elbow-with-stainless-clamps-for-tight-engine-bays","provider":"Redleaf Auto","version":"1.0","type":"link"}