5" & 6" Exhaust Flapper Protector Valves for MerCruiser Stern Drives and Inboard Engines Manifold Replacement Sierra Marine 18-4458

Name: 5" & 6" Exhaust Flapper Protector Valves for MerCruiser Stern Drives and Inboard Engines Manifold Replacement Sierra Marine 18-4458
Brand: Soxa Marine Parts Manufacturer
Price: 20.5 USD
Availability: InStock

$20.50 USD

If you are unsure whether this product is compatible with your specific engine model, please feel free to contact our technical specialists at info@soxa-marine.com.

Our team will review your inquiry and respond within 48 hours.

Soxa Marine Stern Drive Exhaust Flapper Protector Valves Set

SoxaMarine 5 Inch Exhaust Manifold Flapper Valves with Clamps Set.
5" & 6" or 127mm & 152.4mm
5" Requires two 45° cuts, use on Chris-Craft Inboard, Chrysler Inboards, Crusader Inboards, Pleasurecraft (PCM) Waukesha and Mercury/Mariner Inboard/Outboard
Match to Aftermarket Sierra Marine 18-4458, 18-4458D, Mallory Marine 9-44002 and GLM Marine 89260
Compounded rubber flapper valves prevent water from entering the exhaust system made with weather resistant EPDM with UV stabilizer.
SoxaMarine is the aftermarket marine engine parts manufacturer and dealer, cover every major engine brand.

Mercury Mercruiser Stern Drive Models Specifications

Various MerCruiser stern drive and inboard engines exhaust manifolds installations
5" & 6" Inch

Package Include:

Exhaust Flapper Protector Valves

Our Store Include Most Marine Engine Part

GENERAL POLICY
Soxa Marine company reserves the right to open wholesale accounts to legitimate marine businesses who maintain a proper business establishment and purchase in wholesale quantities.
We carefully screen all new Dealer applications to be certain they come from legitimate Dealers.
We reserve the right to refuse to sell to any account meeting or not meeting Dealer requirements. Possession of this catalog does not constitute an offer to sell if without our confirm.

SHIPPING
All packages are shipped Standard Ground Shipping by default unless other arrangements are made. Orders received by 5:00 PM will be shipped the same day. However, orders placed after 5:00 PM will not ship until the following business day. In the case of a back-order or substitution, customer service will attempt to reach you via telephone. Please contact us immediately if your order is incomplete, damaged, or lost in transit.
A replacement will be sent at no additional cost if Soxa Marine or shipping carrier is at fault. The return policy may be applied to any order refused or canceled after shipment.
Shipping standards do not apply to failures caused by conditions beyond Soxa Marine’s control including, but not limited to, acts of God, riots, strikes, labor disputes, or disruptions in communication or transportation networks.

TERMS
Soxa Marine accepts COD, Visa, Mastercard, American Express & Discover or ACH (Electronic Check) for payment. There is no minimum order required to place an order.

RETURNS
If you are not satisfi ed for any reason, you must email for a return authorization within 15 days of purchase date for a full refund. All returns must be made within 30 days of the purchase date and all returned merchandise must be in the original package in good resalable condition.

Soxa Marine Limited Warranty
Soxa Marine warrants the products it produces to be free from defects in materials or workmanship under normal use for a period of ninety (90) days after the date of original purchase. If in this ninety (90) day period a defect in the product should occur, the product may be returned for replacement, free of charge. Your sole remedy in the event of a defect in a product is limited to replacement of the product as provided above. Except as expressly provided above, Soxa Marine makes no warranties, either express or implied, with respect to consequential damages arising out of or in connection with the product. Income, profi t or losses sustained as the result of injury (including death) to any person, or loss of or damage to property. Installation of these parts could adversely aff ect the motor manufacturers warranty coverage.

"Partner with SOXA Marine – Where Quality Meets Affordability!"

Founded in 1987, Soxa Marine Parts Manufacturer (上海松夏游艇设备有限公司) began as a specialized outboard motor repair workshop and has grown into a global distributor of marine engine parts. Our mission is simple: to provide top-tier OEM-compatible parts with unparalleled service, ensuring minimal downtime for commercial and recreational marine operators worldwide.

Quality-Driven Operations

Despite our compact team of 8 dedicated professionals, SOXA MARINE maintains rigorous quality standards through a vertically integrated workflow:

Engineering Excellence: 2 senior engineers oversee R&D and technical specifications.
Stringent Quality Control: A dedicated 2-person QA team performs multi-stage inspections.
Efficient Logistics: 3 warehouse specialists manage global shipping via platforms like Shopify, ensuring timely delivery.

Business Models

Model	Clients	Advantages
Retail	End-users/Workshops	Tech support + global shipping in 72hrs
Dropshipping	E-commerce distributors	Zero inventory, custom packaging
Wholesale	Regional distributors	Volume discounts + territory protection

Who We Are

Founded in 1987, Soxa Marine began as a specialized outboard motor repair workshop and has grown into a global distributor of marine engine parts. Our mission is simple: to provide top-tier OEM-compatible parts with unparalleled service, ensuring minimal downtime for commercial and recreational marine operators worldwide.

Global Reach, Local Service
With 12 warehouses across key maritime regions, we guarantee:
✔ Fast Local Delivery – 48-72 hours to most ports
✔ Smart Inventory Allocation – 85% of orders ship from within your region
✔ Seamless Backorder Solutions – Automatic rerouting to backup hubs (U.S. or China)
✔ Freight Cost Coverage – All shipping expenses included in your order

📍 Our Warehouse Locations:

Americas: 3 U.S. hubs (East/West/Gulf Coast) + Brazil

Europe: Spain, Germany, France, Norway, UK

Asia-Pacific: China, Malaysia, Indonesia, Australia

Core Products & Expertise

We supply 2,000+ marine engine parts for leading brands, including:

🔧 Outboard Motor Parts
Yamaha • Mercury • Suzuki • Honda • Evinrude • Johnson • Tohatsu
(Propellers, ignition systems, Coling, fuel pumps, gaskets, and more)

⚙️ Marine Engine Components
Yanmar • Volvo Penta • Onan
(Engine Cooling , cylinder heads, injectors, ECM modules, and more)

Flexible Business Solutions
We cater to all types of customers through three tailored service models:

1️⃣ Retail – For workshops & boat owners

Technical support + 72-hour global shipping

2️⃣ Dropshipping – For e-commerce sellers

Hassle-free fulfillment with custom packaging

3️⃣ Wholesale – For distributors

Volume discounts + exclusive territory protection

Quality You Can Trust

✅ ISO 9001:2015 certified manufacturing

✅ 12-24 month warranty on select parts

✅ 3D-scanned precision engineering for OEM compatibility

Why Customers Choose Soxa Marine
🌎 Global stock, local speed – Orders route to the nearest warehouse

💰 No hidden fees – Shipping costs always covered by us

🚢 Emergency ready – Critical parts available for air freight

Join thousands of satisfied customers worldwide who rely on Soxa Marine for dependable marine engine solutions. Let’s keep the world’s vessels moving—together.

📞 Contact us today to discuss your specific needs via info@soxa-marine.com !

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.

To start a return, you can contact us at info@soxa-marine.com. Please contact us by email before returning any items, and we will check for the nearest return warehouse address for your shipment.

If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.

You can always contact us for any return question at info@soxa-marine.com.

Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

Exceptions / non-returnable items
Certain types of items cannot be returned, like perishable goods (such as food, flowers, or plants), custom products (such as special orders or personalized items), and personal care goods (such as beauty products). We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item.

Unfortunately, we cannot accept returns on sale items or gift cards.

Exchanges
The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.

European Union 14 day cooling off period
Notwithstanding the above, if the merchandise is being shipped into the European Union, you have the right to cancel or return your order within 14 days, for any reason and without a justification. As above, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.

Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method within 10 business days. Please remember it can take some time for your bank or credit card company to process and post the refund too.
If more than 15 business days have passed since we’ve approved your return, please contact us at info@soxa-marine.com.