Sierra 18-1848 Exhaust Manifold for GM and Ford Center Rise Engines

The Sierra 18-1848 is an exhaust manifold built to fit many GM and Ford engines that use a center rise manifold configuration. It is a direct-fit replacement designed to route exhaust gases away from the engine and into the riser and exhaust hose system, maintaining proper cooling water flow and exhaust flow through the powerhead.

This manifold is designed to work as part of a complete exhaust system. It pairs with riser gasket 18-0943-2 to seal the connection between the manifold and riser, and with mounting kit 18-8507 for a proper installation. It also cross-references to alternate manifold part number 18-1986-1, so buyers researching either number can confirm they are looking at compatible hardware for the same engine family.

Because it fits many GM and Ford applications using the center rise manifold layout, the 18-1848 is a common replacement choice when an original manifold has cracked, corroded, or otherwise failed. At 32 pounds, it is built to the same general weight and duty class as the OEM hardware it replaces.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-1848
• Product Type: Exhaust Manifold
• Fitment: Fits many GM and Ford center rise manifolds
• Companion Riser Gasket: 18-0943-2
• Companion Mounting Kit: 18-8507
• Alternate Manifold Reference: 18-1986-1
• Weight: 32 pounds
• UPC: 808282266431

Fitment

• Fits many GM and Ford engines with a center rise manifold configuration
• Use with riser gasket 18-0943-2 and mounting kit 18-8507 for a complete installation
• Alternate manifold reference: 18-1986-1

Frequently Asked Questions

What engines does the Sierra 18-1848 exhaust manifold fit? The Sierra 18-1848 fits many GM and Ford engines that use a center rise manifold configuration.

Does the 18-1848 come with a riser gasket? No, the manifold itself does not include the riser gasket. It is designed to be used with riser gasket 18-0943-2, which should be ordered separately for a proper seal.

Is a mounting kit needed to install the 18-1848 manifold? Yes, mounting kit 18-8507 is the companion mounting kit designed for use with the Sierra 18-1848 manifold.

How much does the Sierra 18-1848 manifold weigh? It weighs 32 pounds.

Is 18-1986-1 the same as the 18-1848? 18-1986-1 is listed as an alternate manifold reference alongside the 18-1848, so the two are associated part numbers for compatible manifold hardware rather than identical part numbers.

Is this a direct OEM replacement manifold? The Sierra 18-1848 is designed to fit many GM and Ford engines that use a center rise manifold layout, making it a direct-fit replacement manifold for those applications.

What is the UPC for the Sierra 18-1848? The UPC for this manifold is 808282266431.

What material is the 18-1848 exhaust manifold made from? Material is not specified for the Sierra 18-1848 in current product data.

Can I use the 18-1848 with any riser? The 18-1848 manifold is designed to be used with riser gasket 18-0943-2; using a mismatched gasket can affect the seal between the manifold and riser.

Does the Sierra 18-1848 fit both GM and Ford engines? Yes, the 18-1848 is designed to fit many GM and Ford engines that share the center rise manifold configuration.