MERCRUISER 8M0174306 Exhaust Manifolds Catalyst Freshwater 6.2

( Brand: Mercruiser ), ( Manufacturer Part Number: 8M0174306 ), ( Part Type: Exhaust Manifold )

Review MERCRUISER 6.2 Exhaust Manifolds Catalyst Freshwater Complete fits 300 350

Introducing the Mercruiser 8M0174306 Exhaust Manifolds, a crucial component of your 6.2 liter, 300-350 horsepower engine. These manifolds are specifically designed for use in freshwater applications, ensuring optimal performance and reliability in marine environments.

The 8M0174306 Exhaust Manifolds feature a sophisticated catalytic converter design, which plays a pivotal role in reducing harmful emissions. This advanced technology converts exhaust gases into less toxic forms before they are released into the water. The catalyst is designed to be durable and efficient, ensuring long-lasting performance and compliance with current emission regulations.

The manifolds are engineered using high-quality materials, such as corrosion-resistant cast iron and stainless steel. This construction not only ensures durability but also offers excellent heat resistance, ensuring optimal engine performance even under heavy load conditions.

The design of the manifolds ensures a smooth and efficient exhaust flow, which translates to increased power output and improved fuel efficiency. The exhaust ports are strategically placed to minimize backpressure, allowing the engine to breathe freely and deliver maximum power.

The 8M0174306 Exhaust Manifolds are easy to install and come complete with all necessary hardware. The OEM design ensures a perfect fit, and the manifolds can be easily integrated into your existing exhaust system. Additionally, the manifolds are covered by Mercruiser's industry-leading warranty, providing you with peace of mind and protection against manufacturing defects.

In summary, the Mercruiser 8M0174306 Exhaust Manifolds are a must-have for anyone looking to upgrade their 6.2 liter, 300-350 horsepower engine for freshwater applications. With their advanced catalytic converter technology, durable construction, and efficient design, these manifolds offer superior performance, reliability, and compliance with emission regulations.

Pros and Cons of Buying Mercruiser 8M0174306 6.2 300 350 Exhaust Manifolds with Catalyst (Freshwater)

The Mercruiser 8M0174306 6.2 300 350 Exhaust Manifolds with Catalyst (Freshwater) are essential components for your Mercruiser engine, responsible for directing exhaust gases away from the engine and reducing harmful emissions. This article provides an in-depth analysis of the pros and cons of purchasing these exhaust manifolds.

1. Emission Compliance: These exhaust manifolds come with integrated catalytic converters, ensuring compliance with emission regulations.

2. Efficient Combustion: The manifolds are designed to optimize combustion efficiency, leading to improved engine performance and fuel economy.

3. Reduced Exhaust Gas Temperature: The catalytic converters help reduce exhaust gas temperature, which in turn protects the engine from thermal damage and prolongs its lifespan.

4. Improved Engine Sound: The exhaust manifolds can contribute to a more pleasing engine sound, enhancing the overall boating experience.

5. OEM Quality: These manifolds are manufactured by MerCruiser, ensuring a perfect fit and OEM quality.

1. Cost: The price point of these exhaust manifolds may be higher compared to aftermarket alternatives, which could be a deterrent for some buyers.

2. Weight: The inclusion of catalytic converters adds weight to the exhaust system, potentially affecting the overall weight and balance of the boat.

3. Limited Availability: These exhaust manifolds may not be readily available at local marine parts stores, which could require ordering online or through a dealership.

The Mercruiser 8M0174306 6.2 300 350 Exhaust Manifolds with Catalyst (Freshwater) provide several benefits, including emission compliance, efficient combustion, reduced exhaust gas temperature, improved engine sound, and OEM quality. However, they come with potential drawbacks like higher cost, increased weight, and limited availability. Ultimately, the decision to purchase these manifolds depends on your personal priorities, budget, and the specific requirements of your Mercruiser engine.

If you prioritize emission compliance, improved engine performance, and OEM quality, the Mercruiser 8M0174306 6.2 300 350 Exhaust Manifolds with Catalyst (Freshwater) are a worthy investment. However, if you're budget-conscious or prefer a lighter exhaust system, aftermarket alternatives might be a more suitable option. It's essential to assess your needs and consider all factors before making a final decision.

Details:

Roughly 120 hours on them. They come complete with all sensors, as well the catalysts. Very nice shape with minimal to no corrosion. Motor ran great with no codes for 02 sensors or catalysts.

Listed is a set of freshwater exhaust manifolds off 2016 Mercruiser 6.2 300.

part #: 8m0174306 price

• $1300.00

specifications exhaussyste:

• for models: 300, 350
• brand: Mercruiser
• mpn: 8m0174306
• part type: Exhaust Manifold

seller exhaussyste:

• city: Mokena, Illinois
• rating: 100.0%
• # reviews: 184

general exhaussyste:

• Boat Parts > Inboard Engines Components > Exhaust Systems
• condition: Used

offer exhaussyste:

• options: Ship-to-home
• quantity: 1
• availability: In Stock
• best offers: True
• sold: 0
• started: December 11, 2025

returns exhaussyste:

• policy: No Returns

shipping exhaussyste:

• class: Standard
• transit: 3-7 Days
• type: Fixed
• carrier: UPS
• service: UPS Ground
• cost: $150.00

payments exhaussyste:

• credit card: Diners-club
• other
• wallet: Google-pay

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