Manifold Riser Spacer Kit 

Key Features:

• Packaged as a set, complete with mounting hardware
• 3" Riser Kit

Additional Details:

• Fits: MCM V-6 carb & TBI eng. w/ 2 piece exhaust manifolds (s/n 0M614999 & below)

Use With:

• 18-1952-1: Manifold
• 18-8554: Exhaust Elbow Mounting Kit
• 18-8555: Exhaust Elbow Mounting Kit
• 18-1953-2: Manifold
• 18-1957-2: Manifold

Interchanges/Replaces

GLM

• 50310

Mercruiser Stern Drive

• 807476A6
• 93320A13
• 93320A2
• 93320A3
• 93320A5
• 93320A6

List of Containing Parts

Sierra Item #	OE/Competitor #	Quantity	Description	Image	Comments
18-1908	Barr MC-20-93320A3 Mallory 9-40530 Mercruiser Stern Drive 93320 Osco 3320	2	Manifold Riser Spacer		N/A
18-4258	Crusader 113186 GLM 21892 Mallory 9-41205 Mercruiser Stern Drive 22-33198 22-33198A1 22-41622 22-46754 Osco 1016012	2	Pipe Plug		N/A
18-4263	Chrysler/Force/US Marine 22-328021 22-328022 F700633 FI5810151 GLM 21893 Mercruiser Stern Drive 22-32802 22-328021 22-328022 22-841908 Mercury Marine 22-30139 22-32802 22-328021 22-328022	2	Pipe Plug		N/A
18-2849-1	Barr MC 47 27 87105 GLM 32080 Mallory 9-61414 Mercruiser Stern Drive 27-818832 27-860232 27-863726 27-87105 27-871051 Osco 8503-GO	2	Exhaust Elbow Gasket		N/A
18-0897	Barr MC 20 99208 MC47-27-41813 GLM 30240 Mallory 9-61413 Mercruiser Stern Drive 27-41813 27-860233 27-863724 Osco 8503-GR	2	Exhaust Elbow Gasket		N/A
18-0672	Barr MC 20 87918 MC-47-27-41811 GLM 30220 Mallory 9-61422 Mercruiser Stern Drive 27-41811 27-860231 27-863725 27-8637251 Osco 8503-GB	2	Exhaust Elbow Gasket		N/A
NSS	Mercruiser Stern Drive 11-49838	8	Lockwasher	No Image	N/A