Sierra 18-1970-2 Exhaust Riser Elbow for Mercruiser Exhaust Manifolds

The Sierra 18-1970-2 is an exhaust riser elbow built for Mercruiser exhaust manifold applications. It is manufactured as a direct OE replacement and is fully interchangeable with the original equipment part it replaces, so it drops into the same mounting points without modification. The riser elbow arrives primed and painted in white for added corrosion resistance and protection during storage and installation, and it is ready to install straight out of the box without additional finishing work.

This riser elbow is designed to work with specific mounting hardware rather than as a stand-alone bolt-on part. It is compatible with mounting kit 18-8529, which includes 18-0897 elbow gaskets, giving you the gaskets needed for a proper seal at installation. It is also compatible with mounting kit 18-8554, which is used together with the 18-1908 manifold spacer when mounting to manifold 18-1953-2. Selecting the correct mounting kit for your setup ensures the riser elbow seats and seals correctly against the manifold.

Because exhaust risers see constant exposure to combustion byproducts, raw water, and heat, the painted finish and OE-grade construction of the 18-1970-2 are intended to hold up under continuous marine engine operation. Confirm your existing riser and mounting kit part numbers before ordering to make sure this elbow matches your manifold setup.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-1970-2
• Product Category: Mercruiser Exhaust Manifolds
• Weight: 21.8 pounds
• Package Dimensions: 11 x 10.9 x 6.5 inches
• Color: White
• Finish: Primed and painted
• Country of Origin: Taiwan
• UPC: 808282374013
• Compatible Mounting Kits: 18-8529, 18-8554
• Package Quantity: 1

Fitment

• Use with mounting kit 18-8529 (includes 18-0897 elbow gaskets) for direct mounting.
• Use with mounting kit 18-8554 together with manifold spacer 18-1908 when mounting to manifold 18-1953-2.

Replaces (OEM)

• No OEM cross-reference numbers are listed for this specific part number.

Frequently Asked Questions

What is the Sierra 18-1970-2? The Sierra 18-1970-2 is an exhaust riser elbow used on Mercruiser exhaust manifold setups, manufactured as a direct OE replacement for the original riser elbow it replaces.

Does the 18-1970-2 come with gaskets? The riser elbow itself does not include gaskets, but mounting kit 18-8529 for the 18-1970-2 includes 18-0897 elbow gaskets needed for installation.

Which mounting kit should I use with this riser elbow? Mounting kit 18-8529 is used to mount the 18-1970-2 directly and includes the 18-0897 elbow gaskets; mounting kit 18-8554 is used instead when installing the 18-1970-2 with manifold spacer 18-1908 onto manifold 18-1953-2.

How much does the 18-1970-2 riser elbow weigh? The Sierra 18-1970-2 exhaust riser elbow weighs 21.8 pounds.

What color and finish does this part have? It has a white, primed and painted finish applied for added corrosion resistance and protection before installation.

Is the 18-1970-2 a genuine Sierra part or aftermarket? The 18-1970-2 is a Sierra branded part manufactured as a direct OE replacement, fully interchangeable with the original equipment part it is designed to replace.

Can this riser elbow be used with a manifold spacer? Yes, the 18-1970-2 can be paired with the 18-1908 manifold spacer when mounting kit 18-8554 is used, for installations on manifold 18-1953-2.

Where is the Sierra 18-1970-2 manufactured? The country of origin listed for this exhaust riser elbow is Taiwan.

What is included when I order the 18-1970-2? The package includes one 18-1970-2 exhaust riser elbow; mounting hardware and gaskets are supplied separately through the compatible mounting kits (18-8529 or 18-8554).

What are the package dimensions of the 18-1970-2? The 18-1970-2 exhaust riser elbow ships in a package measuring 11 x 10.9 x 6.5 inches.

Does the 18-1970-2 fit any exhaust manifold? The 18-1970-2 is intended for Mercruiser exhaust manifold applications and, when used with mounting kit 18-8554 and spacer 18-1908, is compatible with manifold 18-1953-2.

Is a UPC available for the Sierra 18-1970-2? Yes, the Sierra 18-1970-2 exhaust riser elbow carries UPC 808282374013.