Exterior Components› Body Panels and Components

ATTWOOD MARI

VENT-CLAM SHELL SS LG

$19.28

SKU: A09O 66400-1

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Special Order
Ships in 4–6 weeks
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

The Attwood Marine 66400-1 is a large clam shell vent designed for hull mounting. It provides a seal and splash protection for vent holes, wire, and hose openings. The vent is constructed from durable 300 series stainless steel and features three holes for #6 fasteners.

This vent is designed for intake or exhaust and meets ABYC H-2 cross sectional area requirements. The ventilation hose, which is not included, twists into the bottom of the box to create a raised water barrier. Plastic vents are noted as corrosion-resistant and non-discoloring.

Fitment

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandATTWOOD MARI
Part NumberA09O 66400-1

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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