Sierra Exhaust Manifold 18-1932 for Volvo Penta GM V6 AQ 175, 205, 430 A/B, 432, 434 - Replaces 856894-1

The Sierra 18-1932 is a cast iron exhaust manifold engineered as a direct replacement for the OEM manifold on GM V6-powered Volvo Penta stern drive engines, model years 1993 and before, in the AQ 175, 205, 430 A/B, 432, and 434 applications. The manifold routes exhaust gases away from the engine while cooling water jackets around the casting help manage engine heat, protecting the engine block from thermal stress during operation. Built from cast iron with a machined exterior finish, it is designed to meet or exceed the fit, form, and function of the original equipment part it replaces, giving boat owners a durable, drop-in solution for manifold replacement or rebuild projects. This manifold fits port and starboard applications. When installing, pair the 18-1932 with the 18-2909 manifold gasket for a proper seal at the mounting surface; the matching 18-2971-1 elbow gasket is used where an 18-1936 elbow is installed alongside this manifold. Because exhaust manifolds are wear items subject to salt water corrosion and thermal cycling, replacing a cracked or leaking manifold with a properly specified part like the 18-1932 helps restore reliable engine cooling and exhaust flow. Always confirm the OE number cast into your existing manifold or stamped on your engine documentation against the cross-reference below before ordering.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-1932
• Product Type: Exhaust Manifold
• Material: Cast Iron
• Finish: Machined
• Weight: 32 pounds
• OEM Cross Reference: 856894-1
• Application: GM V6 (1993 & Before), Volvo Penta Model AQ 175, 205, 430 A/B, 432, 434
• Companion Part: Use with 18-2909 Manifold Gasket
• UPC: 808282257613

Fitment

• GM (V6) (1993 & Before)
• Volvo Penta Model AQ 175
• Volvo Penta Model AQ 205
• Volvo Penta Model AQ 430 A/B
• Volvo Penta Model AQ 432
• Volvo Penta Model AQ 434

Replaces (OEM)

• 856894-1

Frequently Asked Questions

What engines does the Sierra 18-1932 manifold fit? The 18-1932 fits GM V6-powered Volvo Penta stern drive engines built in 1993 and before, specifically model AQ 175, 205, 430 A/B, 432, and 434.

What OEM part number does the 18-1932 replace? This manifold is a direct cross-reference for OEM number 856894-1 on the applicable Volvo Penta GM V6 engines.

Is the 18-1932 manifold for port or starboard? The Sierra 18-1932 exhaust manifold fits both port and starboard applications on the applicable GM V6 Volvo Penta engines.

What material is the 18-1932 manifold made from? It is constructed from cast iron with a machined exterior finish for durability in the marine exhaust environment.

How much does the 18-1932 manifold weigh? The Sierra 18-1932 exhaust manifold weighs 32 pounds.

What gasket should I use with the 18-1932 manifold? Use the 18-2909 manifold gasket with the 18-1932 to ensure a proper seal at installation.

Does the 18-1932 manifold work with the 18-1936 elbow? Yes, when the 18-1936 elbow is used with the 18-1932 manifold, the 18-2971-1 elbow gasket is the matching gasket for that connection.

Is the Sierra 18-1932 a genuine OEM part or aftermarket? The 18-1932 is a Sierra-manufactured replacement manifold, built to meet or exceed the specification of the original 856894-1 manifold it replaces rather than being a factory OEM part.

Will the 18-1932 manifold fit any Volvo Penta engine? No, fitment is limited to GM V6 engines from 1993 and before in the AQ 175, 205, 430 A/B, 432, and 434 models; it is not a universal fit across all Volvo Penta engines.

What is the difference between the 18-1932 and the 18-1936? The 18-1932 is the exhaust manifold itself, while the 18-1936 is a separate elbow component used alongside it, each requiring its own matching gasket.