{"product_id":"cathedral-port-intake-manifold","title":"Cathedral Port Intake Manifold","description":"The GM 12580420 intake manifold, originally found on the 6.0L Trailblazer SS, serves as a performance upgrade for LS engines. Unlike earlier truck intakes designed primarily for low-end torque or the LS6 intake focused on peak horsepower, the Trailblazer SS manifold offers a balance, providing more torque than older truck intakes while also increasing horsepower beyond the LS6.\n\nConstructed from durable polymer, this manifold is a direct AC Delco part. However, it is sold bare and requires additional components for installation. These include fuel rails, injectors, a throttle body (a 4-bolt mounting type is necessary, unlike the 3-bolt systems on some early truck manifolds), a MAP sensor, and potentially an EFI controller. Adapters may be needed for the throttle body and fuel rail connections, depending on the existing setup.\n\nInstallation of the TBSS intake may present height challenges, potentially causing clearance issues with the hood, although it is known to fit the stock hood on first-generation Chevelles. Users often adapt LS1\/LS6 fuel rails, which can be a more affordable option than specific TBSS rails, but careful attention must be paid to ensure proper injector seal to prevent dangerous fuel leaks. A 4-bolt throttle body is also required, and an adapter may be needed if only a 3-bolt throttle body is available.\n\nFor full functionality, an EFI controller is recommended, especially if further engine modifications are planned. Stand-alone EFI systems can manage engine and even transmission control. The manifold is noted as fitting wet sump applications only and is for non-Variable Valve Timing (Non-VVT) engines. It is considered a performance upgrade for 2006 and older 5.3L\/6.0L LS engines.","brand":"ACDelco","offers":[{"title":"Default Title","offer_id":52688563896632,"sku":"12580420","price":139.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/663689588.jpg?v=1784891084","url":"https:\/\/store.motormia.co\/products\/cathedral-port-intake-manifold","provider":"MOTORMIA","version":"1.0","type":"link"}