Main Engine Exhaust Systems
Aircraft-quality TIG-welded 316L and Inconel main engine exhaust systems for the world's finest yachts, sportfish, mega-yachts, and commercial vessels.
What this service includes
D'Angelo Marine Exhaust engineers, fabricates, and installs main engine exhaust systems for the finest boats, yachts and builders in the world, and to the standards demanded by commercial & military-grade vessels.
Aircraft-quality welds are performed by hand by American Welding Society certified fabricators. In addition to industry standard 316L, we offer the option of fabrication in Inconel for additional resistance and extended warranty. Components are die-formed in tube size — not pipe — so every section fits perfectly the first time.
Our quality assurance department monitors product quality at every stage. We're compliant with AIAG, APQP, and PPAP processes with Cummins Marine, Detroit Diesel, and John Deere.
Benefits
- 316L stainless and Inconel alloy options
- AWS-certified hand TIG welds
- Die-formed elbows in tube size — perfect fit
- Passivation in nitric acid for restored corrosion resistance
- Hard-coat lagging or insulation blankets
- Matte, polished, powder-coated, or electroplate finishes
- Wide range of silencer packages for sound attenuation
- QS9000 quality standards · job-number traceability
How we work
Consult
We discuss vessel, engines, layout, and finish goals. Drawings or physical measurements accepted.
Engineer
Our six full-time engineers design the system in 3D, calculate back-pressure, and submit to class if required.
Fabricate
TIG-welded by AWS-certified fabricators in 316L, Inconel, or AL6XN. Passivated and finished to spec.
Install & Sea-Trial
Our service teams travel to your yard or location for installation, commissioning, and sea trials.
Common challenges we eliminate
Poor weld integrity
Hand-TIG aircraft-quality welds with Argon protection.
Excessive back-pressure
Designed to engine spec from turbo outlet to overboard.
Corrosion failure
Passivation + premium alloys (316L, Inconel, AL6XN).
Sound / vibration
Custom silencer packages tuned to the vessel.
Poor fitment
Die-formed tube-size elbows fabricated in-house.
Lost traceability
Every component is job-numbered.
Real builds, real installs
Four decades of marine exhaust authority
Founded 1986. Six full-time engineers. Four mobile service teams. 30,000 sq ft Fort Lauderdale facility. The builders, captains, and engineers who run the world's finest vessels call us first.
AWS-Certified Welders
Hand TIG-welded 316L & Inconel under a 1,625-gallon Argon atmosphere.
Engineered In-House
6 engineers • 3D CAD • back-pressure analysis • full class submissions.
Class-Approved
ABS · Lloyd's · DNV · RINA · ABYC — submitted, surveyed, signed off.
Worldwide Service
Caribbean · Med · Pacific Rim · Gulf — four mobile teams on call.
Recent installs & case studies
Detroit Eagle — Feadship Mega-Yacht Exhaust
Full main-engine exhaust system with turbine integration on a Feadship mega-yacht — designed, fabricated, and commissioned end-to-end.
U.S. Coast Guard — Fast Response Cutter (FRC)
Mission-critical exhaust system for the FRC platform — built to commercial / military specification standards with full traceability.
Westport 50m — Exhaust Retrofit
Captain Herb walks through a full exhaust retrofit on a 50m Westport, replacing aged components with new 316L runs and integrated insulation.
Frequently asked
What alloys do you offer?
316L stainless as standard. 321 and AL6XN for higher corrosion resistance. Inconel for extended-warranty work. 5086 aluminum when aluminum is specified.
Do you work with my class society?
Yes — ABS, Lloyd's, DNV, RINA, ABYC and others. We submit drawings and specifications for design approval and coordinate class surveyors at commissioning.
Can you match a specific finish?
Matte, polished, powder-coated, and electroplate finishes are all available. Insulation blankets come in black, gray, silver, or white.
Do you travel to install?
Yes. Our four full-time mobile service teams travel worldwide for installs, commissioning, and sea trials.
You may also need
New Installations & Repowers
From clean-sheet design through sea trials. Coordinated with main-engine overhauls and repowers.
Generator Exhaust Systems
Cut noise, vibration, and discharge. Marina-compliant mufflers engineered for comfort and longevity.
SeaClean Diesel Particulate Filter
Patented filtration that captures up to 98% of generator soot — the only system with variable pre-heater technology.
Ready to engineer your next exhaust system?
Speak with our team about new installs, repowers, repairs, or SeaClean retrofits — anywhere in the world.