Mercury – Quicksilver Exhaust Manifold | Port or Starboard | For MerCruiser V8 Engines | 807078T10

Overview

When it’s time to replace a worn or corroded exhaust manifold, trust the Mercury Marine 807078T10 Quicksilver Exhaust Manifold to restore factory-grade performance and reliability. Built for V8 MerCruiser engines made by General Motors, this manifold fits 454 and 502 CID models (1981–2002) and can be installed on either the port or starboard side. Designed for both freshwater and saltwater environments, it features a hot-dipped and corrosion-protected finish to ensure long-term durability and resistance to rust. Each manifold comes with a gasket and is engineered to match Mercury’s original design for smooth exhaust flow and efficient cooling.

Key Features

• Purpose: Replaces old or corroded exhaust manifolds to maintain cooling and exhaust performance.
• Fitment: Works on V8 MerCruiser 454 and 502 CID engines (1981–2002); fits either port or starboard side.
• Durability: Hot-dipped and coated to resist internal and external corrosion in saltwater or freshwater.
• Complete Kit: Includes a gasket for quick and secure installation.
• Performance: OEM casting and design ensure precise fitment and efficient exhaust flow.

Engine & Boat Compatibility

• V8 MerCruiser sterndrive and inboard engines made by General Motors (454 & 502 CID)
• Model years: 1981–2002
• Fits both port and starboard exhaust sides

Performance & Real-World Benefits

The 807078T10 exhaust manifold plays a crucial role in maintaining proper exhaust flow and engine cooling. Over time, factory manifolds can corrode from heat and exposure to water, leading to leaks, reduced performance, or water intrusion into the cylinders. This OEM replacement eliminates those risks with a clean, precision-cast design and anti-corrosion finish that keeps the internal coolant passages free of scale and rust.

Its sturdy coating and Mercury’s engineering standards make it a durable option for both freshwater and saltwater use. Once installed, you’ll restore full exhaust efficiency, reduce heat buildup, and protect your engine from internal corrosion — helping it perform smoothly for years to come.

Why Choose Mercury OEM

The Quicksilver 807078T10 is a genuine Mercury Marine component, built to meet the exact performance and dimensional standards of the original manifold. Aftermarket copies can suffer from uneven castings, poor fitment, or coatings that fail after a single season in saltwater.

Mercury’s OEM manifolds are pressure-tested, coated, and precision-machined to deliver reliable, leak-free operation. It’s the same level of quality trusted by Mercury service technicians and boat manufacturers around the world.

FAQ

Q1: Which engines does this fit?
It fits MerCruiser V8 454 and 502 CID engines (model years 1981–2002) made by General Motors.

Q2: Can it be installed on either side?
Yes — it fits both port and starboard sides.

Q3: Can I use it in saltwater?
Yes — it’s hot-dipped and corrosion-coated for protection in both fresh and saltwater environments.

Q4: What’s included in the box?
The manifold comes with a gasket for installation.

Q5: Why OEM instead of aftermarket?
Because Mercury OEM manifolds are engineered for precise fit, proper cooling, and long-lasting corrosion resistance that off-brand options can’t match.