Quicksilver 864908A1 6-Inch Dry Joint Riser Kit Standard Raw Water Cooling MerCruiser

The Quicksilver 864908A1 is a genuine OEM 6-inch dry joint exhaust riser extension kit designed for MerCruiser inboard and sterndrive engines with standard (raw water) cooling systems. This riser kit adds critical height to the exhaust system, helping to prevent water from backing up through the exhaust piping and into the engine — a common and serious concern for marine inboard applications.

Engineered specifically for 14° dry joint risers, this kit is compatible with bolt lengths of 5-3/4" and 7-1/2" and is designed for warm riser configurations on a wide range of MerCruiser V-6 and V-8 gasoline engines including the 4.3L, 5.0L, 5.7L, 6.2L, 350 MAG, 357 MAG, and 383 MAG Stroker. Fits 2004–2016 MCM V-6, 2002–2016 MCM V-8 Non-EC, and MIE V-8 Non-EC engine applications.

Kit Includes:

• 2 – 6" Riser Spacers
• 2 – Restricted Gaskets
• 2 – Full Flow Gaskets
• 8 – (.375-16 x 7.50) Bolts
• 8 – (.375-16 x 1.00) Bolts
• 8 – (.375-16) Washers
• 6 – (.250-20 x .625) Hex Screws
• 2 – (.250-20 x .375) Hex Screws
• 4 – Pipe Plugs
• 2 – Brackets

Important Notes:

• Designed for raw water (standard) cooling systems only — additional block-off gaskets are required for closed cooling applications
• Gaskets must be replaced in the same configuration as removed
• OEM Quicksilver / MerCruiser Part Number: 864908A 1