Page 805 - 2021 Sierra Catalog

Item No. Description OE No. Application
1 18-1951-1 MANIFOLD (STARBOARD) 774235A2
GM Small Block (V8) 305-350 cu.in. Models 198, 228, & 898. (Starboard)
2 18-1978 MANIFOLD ELBOW 76771A3
Use with Manifolds: 18-1950-1, 18-1951-1; Elbow Gasket 18-2833; Mounting Kit 18-4362.
3 18-3233 MOUNTING STUD 16-49545 3/8-24, 3/8-16 X 1 3/4. Included in 18-4362 mounting kit.
4 NSS MOUNTING STUD N/A Included in 18-8554 mounting kit.
5 NSS MOUNTING BOLT N/A Included in 18-8512 mounting kit.
6 18-2833 ELBOW GASKET 27-99777-2
Use with Elbows: 18-1971 & 18-1978. Included in 18-4362 mounting kit.
7 18-1971 MANIFOLD ELBOW 76351A2
Use with Manifolds: 18-1950-1, 18-1951-1; Elbow Gasket 18-2833; Mounting Kit 18-4362.
8 18-1906 MANIFOLD SPACER 61851
3" Spacer for Manifold: 18-1950-1, 18-1951-1. Use with mounting kit 18-8554 with 18-1971 or 18-1978 Elbows.
9 18-4008 BLOCK OFF PLATE 60207
Use with Manifolds 18-1950-1, 18-1951-1. Requires (2) 18-2833 elbow gaskets.
10 18-1950-1 MANIFOLD (PORT) 77234A2 GM Small Block (V8) 305-350 cu.in. Models 198, 228, & 898. (Port)
11 18-4009 END PLATE 60252A2
Use with (Port & Starboard) Manifolds: 18-1950-1 & 18-1951-1; Mounting Kit: 18-8512
12 18-2832-1 FRONT/END PLATE GASKET 27-48043-1
Fits Port & Starboard Caps of Manifolds: 18-1950-1, 18-1951-1. Use with Front Plate: 18-4009. Included in 18-8512 mounting kit.
13 NSS END PLATE 54870 Fits Manifold: 18-1950-1, 18-1951-1; Mounting Kit: 18-8512.
14 18-2949 MANIFOLD GASKET 96306 Use with Manifold: 18-1951-1
15 NSS MOUNTING BOLT N/A Included in 18-8520 mounting kit.
16 18-8520 MOUNTING KIT N/A
Use with Manifolds: 18-1950-1, 18-1951-1. Includes 18-2949 manifold gasket.
17 18-8512 MOUNTING KIT N/A
Use with Front/End Plates: 18-4009. Includes 18-2832-1 front end plate gasket.
Use with Manifold Spacer: 18-1908 with Riser 18-1971 or 18-1978 18 18-8554 MOUNTING KIT N/A Elbows. Included in 18-1908K. Includes (1) 18-2849-1 & 18-0897
elbow gaskets.
19 18-8514 MOUNTING KIT N/A
Use with Elbows: 18-1971 & 18-1978. Includes 18-2833 gasket & 18-4008 block off plate.
20 18-4362 MOUNTING KIT N/A
Use with Elbows: 18-1971 & 18-1978. Includes 18-2833 elbow gasket.
21 18-8548 HARDWARE KIT N/A
Includes only hardware for 18-1950-1 & 18-1951-1 manifolds. Included in 18-8520 mounting kit.
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I/O — MERCRUISER - Cooling System