{"product_id":"proform-vacuum-advance-lock-out-plastic-gm-hei-distributors-each-67022c-67022c-2","title":"Proform Vacuum Advance Lock Out - Plastic - GM HEI Distributors - Each 67022C","description":"\u003ch2\u003eProform Vacuum Advance Lock Out - Plastic - GM HEI Distributors - Each\u003c\/h2\u003e\n\u003cp\u003eThe Proform Vacuum Advance Lock Out is a high-quality plastic component designed specifically for GM HEI distributors. This product is ideal for automotive enthusiasts, DIYers, and professional mechanics looking to enhance the performance of their ignition systems. By locking out the vacuum advance, this device helps to ensure consistent timing under various driving conditions, making it a valuable addition to any performance engine setup.\u003c\/p\u003e\n\u003cp\u003eManufactured by Proform, a trusted name in automotive performance parts, this vacuum advance lock out is built to meet the demands of both street and track applications. Whether you are tuning your vehicle for better responsiveness or simply looking to replace a worn-out part, this product delivers reliability and ease of installation.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConstructed from durable plastic for long-lasting performance.\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for GM HEI distributors.\u003c\/li\u003e\n\u003cli\u003eHelps maintain consistent ignition timing by locking out vacuum advance.\u003c\/li\u003e\n\u003cli\u003eEasy to install with basic hand tools.\u003c\/li\u003e\n\u003cli\u003eIdeal for performance tuning and racing applications.\u003c\/li\u003e\n\u003cli\u003eLightweight design contributes to overall vehicle efficiency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMaterial: Plastic\u003c\/li\u003e\n\u003cli\u003eApplication: GM HEI distributors\u003c\/li\u003e\n\u003cli\u003eType: Vacuum advance lock out\u003c\/li\u003e\n\u003cli\u003ePack size: Sold individually\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications \/ fitment\u003c\/h3\u003e\n\u003cp\u003eThis vacuum advance lock out is typically used in performance vehicles where ignition timing consistency is crucial.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSuitable for street performance cars.\u003c\/li\u003e\n\u003cli\u003eIdeal for racing applications.\u003c\/li\u003e\n\u003cli\u003eCompatible with modified engines requiring precise timing control.\u003c\/li\u003e\n\u003cli\u003eApplicable in various GM vehicle models with HEI distributors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy buy from Mick’s Gone Bush?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTrusted Australian business focused on reliable power, auto-electrical, and service parts.\u003c\/li\u003e\n\u003cli\u003eStock sourced from reputable distributors and brands.\u003c\/li\u003e\n\u003cli\u003ePractical support for trade, off-grid, and fleet customers.\u003c\/li\u003e\n\u003cli\u003eClear shipping, warranty, and customer service.\u003c\/li\u003e\n\u003cli\u003eExpertise in automotive performance parts to assist your needs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003ch4\u003eWhat is a vacuum advance lock out?\u003c\/h4\u003e\n\u003cp\u003eA vacuum advance lock out is a device that prevents the vacuum advance mechanism in an ignition distributor from adjusting timing based on engine load, ensuring fixed ignition timing for improved performance.\u003c\/p\u003e\n\u003ch4\u003eHow do I install the Proform Vacuum Advance Lock Out?\u003c\/h4\u003e\n\u003cp\u003eThe installation involves removing the distributor cap, locating the vacuum advance mechanism, and securing the lock out in place. Basic hand tools are generally sufficient for this process.\u003c\/p\u003e\n\u003ch4\u003eIs this product compatible with all GM HEI distributors?\u003c\/h4\u003e\n\u003cp\u003eWhile designed specifically for GM HEI distributors, it's advisable to check compatibility with your specific model to ensure proper fitment.\u003c\/p\u003e\n\u003ch4\u003eWill using this lock out affect my vehicle's drivability?\u003c\/h4\u003e\n\u003cp\u003eYes, locking out the vacuum advance can improve performance but may affect drivability, especially at low RPMs. It's recommended for performance applications where consistent timing is desired.\u003c\/p\u003e\n\u003ch4\u003eWhat maintenance is required for this product?\u003c\/h4\u003e\n\u003cp\u003eMinimal maintenance is required; however, regular inspections are advised to ensure it remains securely attached and free from debris.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is a vacuum advance lock out?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A vacuum advance lock out is a device that prevents the vacuum advance mechanism in an ignition distributor from adjusting timing based on engine load, ensuring fixed ignition timing for improved performance.\"}},{\"@type\":\"Question\",\"name\":\"How do I install the Proform Vacuum Advance Lock Out?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The installation involves removing the distributor cap, locating the vacuum advance mechanism, and securing the lock out in place. 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