New Sierra 18-1999 exhaust riser elbow for Ford and GM/Chevrolet V8 marine gas engines. Riser has 3" OD, 10° down-angle outlet. This is a direct replacement for many center-rise Barr, Indmar, Mastercraft, and Marine Power exhaust risers, and is compatible with any of these Indmar manifolds. Compare your casting numbers to the cross-reference below. This riser comes with gasket and bolts. It will fit either side of the engine. Each purchase is for one riser.

Riser mating bolt dimensions are 4" (101.6mm) by 2-5/8" (66.7mm) bolt center-to-center.

This part is new and high-quality cast iron construction. To determine if this is the correct replacement for you, look on your current part for casting numbers and match them to the cross reference below:

Cross Reference	Part Number
Marine Power	0992-000
Osco Motors	992
Barr Marine	20-0082
Sierra Marine	18-1999
Aqua Power	5705
GLM Products	56110

About Sierra
Sierra provides premium-quality aftermarket replacements for over 6,000 marine parts, tools, and components. Sierra products are engineered to meet or exceed OEM standards, and stand up in harsh marine environments. Every new Sierra part comes with a limited lifetime warranty that covers the useful life of the product against any defects in workmanship and materials.

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