Mercury – Quicksilver Exhaust Manifold | Port or Starboard | For MerCruiser V8 Engines | 807078T08

Overview

When it comes to keeping your MerCruiser running cool and breathing efficiently, the Mercury Marine 807078T08 Quicksilver Exhaust Manifold is built to deliver factory performance and reliability. Designed for use on either the port or starboard side of V8 MerCruiser engines made by General Motors, it fits 454 and 502 CID models from 1981 to 2002. With an included gasket and corrosion-resistant E-coated finish, this manifold is a dependable OEM solution for freshwater installations, offering smooth exhaust flow and lasting protection from rust and wear.

Key Features

• Purpose: Replaces worn or corroded exhaust manifolds for proper cooling and exhaust flow.
• Fitment: Designed for V8 MerCruiser 454 and 502 CID engines (1981–2002); fits port or starboard side.
• Construction: E-coated inside and out to protect against corrosion and heat damage.
• Application: Intended for freshwater installations.
• Ease of Use: Comes with the gasket needed for installation.

Engine & Boat Compatibility

• V8 MerCruiser sterndrive and inboard engines by General Motors (454 & 502 CID)
• Model years: 1981–2002
• Fits: Either port or starboard side

Performance & Real-World Benefits

The 807078T08 exhaust manifold restores proper cooling and exhaust flow to your V8 MerCruiser engine. A failing or corroded manifold can cause overheating, exhaust restriction, or water intrusion — all of which can severely damage your engine. This OEM manifold ensures clean exhaust flow and steady water circulation, helping your engine run smoother and cooler.

The protective E-coating resists rust and scaling, even after years of freshwater use. With its precise OEM design, it bolts right up without modification, delivering a leak-free seal and the durability Mercury parts are known for.

Why Choose Mercury OEM

The Quicksilver 807078T08 is a genuine Mercury Marine replacement, made to fit exactly like the original part. Cheaper aftermarket manifolds may have uneven casting, poor sealing surfaces, or inferior coatings that corrode quickly.

Mercury OEM manifolds are engineered and tested under real-world marine conditions to ensure proper exhaust flow, heat dissipation, and long-term reliability. It’s the same quality trusted by Mercury technicians to keep your engine protected and performing at its best.

FAQ

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

Q2: Can it be installed on either side?
Yes — it’s designed to fit either port or starboard side.

Q3: Is this for freshwater or saltwater use?
This version is intended for freshwater installations.

Q4: Does it come with everything needed?
Yes, the gasket is included with the manifold for installation.

Q5: Why choose OEM over aftermarket?
Mercury OEM manifolds ensure exact fitment, superior coatings, and reliable performance that lasts longer in marine conditions.