Exhaust Flapper for OMC Cobra and Volvo Penta SX Sterndrive I/O Engines
Marine exhaust flapper designed to prevent water from backing up into the exhaust manifolds and risers. Installs on the exhaust Y-pipe with one flapper required per side. Compatible with OMC Cobra (1988 and up) and Volvo Penta SX sterndrive inboard/outboard systems including V6, small block, and most big block engines. Sold individually, not as a pair.
OEM PART NUMBERS:
OMC/Volvo Penta: 3853864, 985749, 765166
Additional Cross-References: 984467, 765590, 778183, PM-83864
SPECIFICATIONS:
Product Type: Exhaust Flapper / Shutter
Sold: Each (one per side of Y-pipe, two required per engine)
Prevents water backflow into manifolds and risers
Approximate Size: 3.5" x 2.88"
APPLICATIONS:
OMC Cobra Sterndrive (1988 and Up) - V6, Small Block, Big Block
Volvo Penta SX Sterndrive (1994-1998) - 4.3L, 5.0L, 5.7L, 5.8L, 7.4L, 8.2L
Engine Configurations: 4-Cylinder, V6, V8
⚠️ Verify OEM part number from your original unit before ordering. Sold each, not by the pair.