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New Products (updated 8-12-13)

TBA List
Dry Joint Replacement Sets No. 58650/58660
OMC/Volvo Penta Hi-Rise Elbow No. 51337
Manifold Set w/ Hi-Rise V6 GM No. 58487
Manifold Set w/ Hi-Rise V8 S.B. GM No. 58437
Manifold Set w/ Hi-Rise V8 S.B. Ford No.58492
Manifold Set w/ Hi-Rise V8 B.B. GM No. 58507
OMC 4-Cyl. Manifold No. 51450
Merc. Seawater Pump Service Kit No. 89700
OMC Shift Cable Assy. Kit No. 21455
Exhaust Tube for V8 S.B. Ford 5.8L No. 50700
OMC V8 Conversion Kit Ford 5.8L No. 58497
Product Image Inquiries
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Featured Products

Superior Marine Manifolds
Upper Gear Sets
Heavy Duty Gear Set
Water/Fuel Separator Kit
Gimbal Bearings
Johnson Outboards
Inline Fuel Filters
Aluminum Anode Kits
Needle & Caged Bearing
Water Pumps
Engine Couplers
Marine Service Tools

Manifold Minisite

Manifold Features
Product Pictures
Test Results
Manifold Catalog

Catalogs / Brochures

Catalog - Manifold
Catalog - Mercruiser
Catalog - OMC/Volvo Penta
Catalog - Johnson/Evinrude
Catalog - Mercury/Mariner/Force
Catalog - Yamaha
Brochure - Anodes
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Limited Warranty Terms
Warranty Procedure
Warranty Applications
Warranty Inquiries

Where to Buy

Global Inquiries
Interactive Distributor Map


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Privacy Policy
Image License Agreement Forms

News / Events

Press Releases
Events/Trade Shows

E-Newsletter "On The Horizon"

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On The Horizon - Current Issue
On The Horizon - Archived Issues

Technical Info

Instruction - Aluminum Manifolds
Instruction - V6 Conversion Kit
Instruction - V8 Conversion Kit
Instruction - Merc 120/140 - Inline 4-Cyl.
Instruction - Water Pump Installation
Instruction - Impeller Install No. 89710
Instruction - Seawater Pump No. 12088 Assy.
Instruction - Diaphragm No. 40280
Instruction - Check Valve Kit No. 40250
Instruction - 10 Hour Break-in for Gears
Instruction - V4 Prop Shaft & Clutch Dog
Instruction - Prop Shaft No. 22417
Instruction - Shift Cable Tool No. 90520
Instruction - Height Guage No. 90530
Instruction - Shimming Tool No. 90330
Dimension - Mercruiser Manifolds
Dimension - OMC Manifolds
Dimension - Volvo Penta Manifolds
Dimension - Barr/Indmar/MPower Manifolds
Dimension - Merc-OMC Overlap
Diagram - Water/Separator Fuel Filter
Article - GLM's Conversion Kits
Article - GLM's Superior Marine Manifolds
Article - GLM Offers Help for Dealers
Article - Lost Foam
Article - History of John/Evin V4 Outboards
Article - 30 Years of the OMC Sterndrive
Article - Sand-Cast vs. Die-Cast
Article - Piston: Cast vs. Forged
Article - Servicing Your Sterndrive


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