Marine parts, fast fulfillment, real support

Get the right part without slowing down your season. PowerBoatSupply helps boat owners order with confidence, backed by trusted marine parts expertise and responsive support.

✓ Fast shipping ✓ Fitment help ✓ Secure checkout

Sierra EXHAUST FLAPPER 3 INCH 18-4456

Marine parts, fast fulfillment, real support

Get the right part without slowing down your season. PowerBoatSupply helps boat owners order with confidence, backed by trusted marine parts expertise and responsive support.

✓ Fast shipping ✓ Fitment help ✓ Secure checkout

Brand:: Sierra

Part Number:: 47-4456

$44.89 $34.99

— You save $9.90

Earn $1.05 in PBS Store Credit

Availability: In Stock - Ships same or next business day. Shipping: Free Shipping Over $99

Current Stock:

Quantity:

Get back on the water faster — ships next business day.

Trusted by boat owners & marine techs

Real OEM parts, fast shipping, and support from a Mercury Platinum Dealer.

✓ Best Price ✓ Fast Fulfillment ✓ Trusted Fitment ✓ Real Support

✓ 17,500+ verified 5-star reviews

Description

Sierra_47 - 18-4456 EXHAUST FLAPPER 3 INCH EXHAUST PROTECTOR VALVE (Sierra)

Includes:
• Stainless steel hose clamp
• Weather resistant rubber flapper valve

Replaces: MerCruiser 34565A1, A2

Size 3"

Alternate - SIE 4456 18-4456 47-4456

View AllClose

Specs

UPC:	47-4456
MPN:	18-4456

Reviews

View AllClose