My Account
Shopping Cart

Quicksilver 8M0103774 Port Side Exhaust Manifold Single Catalyst V8 MerCruiser EC

Manufacturer

Quicksilver

<h3>Quicksilver: The Marine Enthusiast&apos;s Trusted OEM Brand</h3><p>For boaters who refuse to compromise on quality, <strong>Quicksilver</strong> has been the benchmark for marine parts, accessories, and engine care products since 1950. Based in Fond du Lac, Wisconsin, Quicksilver operates as the parts and accessories brand of Mercury Marine — and that heritage is central to everything it makes. As the only marine aftermarket brand manufactured and recommended by an original-equipment manufacturer, Quicksilver brings factory-level engineering directly to boat owners, professional technicians, and weekend warriors alike.</p><p>What sets Quicksilver apart from generic aftermarket suppliers is its direct lineage to the engineers who designed the engines in the first place. Every component is engineered, tested, and manufactured with the same exacting standards as the original equipment it replaces. The result is a product line that fits right the first time and delivers the reliability boaters depend on — whether they&apos;re navigating calm inland lakes or pushing through demanding saltwater conditions.</p><p>Quicksilver&apos;s catalog spans more than 40,000 parts across 12 product lines, covering outboard and sterndrive engines from Mercury, Mariner, Yamaha, Honda, Evinrude, Johnson, Suzuki, and more. Among the most critical components in that lineup are Quicksilver Fuel Pumps, which are built to deliver factory fit and consistent fuel delivery across a wide range of outboard applications. Reliable fuel delivery is the foundation of engine performance, and Quicksilver&apos;s fuel system components are engineered to handle the demanding conditions of marine use — including compatibility with current fuel formulations.</p><p>Beyond fuel systems, Quicksilver is a go-to source for Propeller Parts &amp; Accessories that help boaters maintain and optimize their propulsion systems. From hub kits that protect both prop and gearcase to installation hardware and prop tools, these components are designed to the same tolerances as the drives they support. Proper propeller maintenance is one of the most impactful things a boat owner can do for performance, efficiency, and engine longevity — and Quicksilver makes that job straightforward.</p><p>The brand&apos;s commitment extends across lubricants, impellers, thermostats, anodes, fuel filters, oil filters, maintenance kits, and complete service packages — all engineered for the marine environment and tested to meet or exceed the standards of major engine manufacturers. Whether you&apos;re performing routine seasonal maintenance or tackling a more involved repair, Quicksilver provides the parts that restore your engine to peak operating condition.</p><ul style="list-style:disc"><li>OEM-backed engineering from Mercury Marine</li><li>Compatible with Mercury, Yamaha, Honda, Evinrude, Johnson, Suzuki, and Mariner engines</li><li>Over 40,000 parts spanning 12 product lines</li><li>Formulated and tested for freshwater and saltwater environments</li><li>Trusted by DIY boaters and professional marine technicians since 1950</li></ul><p>When reliability on the water is non-negotiable, Quicksilver delivers the peace of mind that only a true OEM-backed brand can provide.</p>

Part Number

8M0103774
09/12/2036 7:03 AM
Sale Price

$937.04

In Stock (10+)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Quicksilver 8M0103774 is a genuine Mercury Marine OEM port side exhaust manifold engineered specifically for EC (Emission Compliant) catalytic V8 MerCruiser sterndrive and inboard engines. Designed for the 305, 350, and 377 CID (3.5L, 5.7L, and 6.2L) engine families on model year 2008 and newer applications, this manifold features a single catalyst design and is sold as a port side (left bank) unit only.

Key Features:

  • Port side only — designed exclusively for the left bank of V8 MerCruiser EC engines (order 8M0103773 for starboard side)
  • Single catalyst configuration — built for newer emission-compliant (EC) MerCruiser engine applications
  • Corrosion-resistant coatings — applied to internal coolant passages and exterior surfaces for extended service life
  • OEM specifications — produced to Mercury Marine factory tolerances for proper fit and optimal engine performance
  • Compatible engine families: GM V8 305, 350, and 377 CID MPI sterndrive and inboard engines, model year 2008 and newer
  • Supersedes legacy part number 879288A04

As a Quicksilver genuine factory part, the 8M0103774 ensures a direct-fit replacement with no modifications required. For a complete exhaust manifold and elbow kit covering both port and starboard sides, this manifold pairs with part number 8M0103773 (starboard). Always replace exhaust manifolds with a matching elbow assembly and fresh gaskets to maintain a leak-free system.

great so far

This item was priced very attractively and shipped promptly. It was ordered on Sunday,<br>June 10th and shipped the next day, arriving at my address on Tuesday, June 12th. A very<br>satisfacory buying experience for me.

Great experience.

Thanks Autoplicity you had the best prices I could find, fast shipping, and everything I ordered was exactly what I was looking for! Great Customer Service!

Nice site. Checked you folks against RockAuto and liked you way better!

Great Place to shop for Auto Parts Very Fast shipping

First off I gotta say that my item arrived much quicker than expected. Funny thing is I ordered a part from another site a few days before I ordered the one from Autoplicity... and I received the Autoplicity item before the other item. In fact the other item hasn't arrived it. Plus the one I ordered from Autoplicty is significantly larger. The item arrived in perfect condition. Pretty impressed. This company is on my recommendations list for sure. They even offer a small reimbursement for writing review. Sheesh they deserve it.

I placed the order on Monday, and the package was delivered two days later, on Wednesday...and that was with FREE SHIPPING!!! It was also at the best price I could find. What more can you ask?

Website was easy to navagate and found just what I needed. By far the best price online with low shipping rates. Shipment arrived just two days after ordering. Will be ordering from Autoplicity again in the near future. Very pleased, Thanks!

This is my second order, so far it's been a great experience.

Very good prices and incredibly fast shipping. Shipping costs were a bit high but I would definitely use them again!

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy