Metcalf Marine ExhaustFort Lauderdale · Custom Marine Exhaust
Built to outlast the vessel.
Metcalf fabricates custom marine exhaust in 316L stainless — water-jacketed parts purge welded for weld integrity, where other systems fail first. Built from your drawings, for superyachts, sportfish and commercial vessels that can't afford a second failure.
The Standard
Water-jacketed parts are always purge welded.
Marine exhaust lives in the hardest environment on any vessel — salt, heat cycling, vibration and condensate acids, all at once. The first thing to go is almost always the weld.
So we purge weld every water-jacketed part — shielding the weld's back side during fabrication to ensure its integrity, in 316L stainless (or AL6XN on request). Every order gets in-process and final quality inspection before it leaves the shop.
Build it once, in the right alloy, welded right — and it outlasts the vessel it's fitted to.
Soot Control Solutions
Cut your yacht's soot by up to 99%.
Beyond fabrication, MMX is an industry leader in marine Diesel Particulate Filter applications — customized emission control that reduces soot production dramatically, often with no additional heat source, on high-profile yachts.
Passive & Active Regeneration
Reclaim the aft deck. Lose the slick on the water.
Custom Fabrication
The systems yachts actually depend on — made to last.
The high-value work is the fabrication: complete exhaust runs and the components that fail first, engineered to the vessel instead of pulled from a shelf.
Water-cooled risers, engineered to endure.
Our 316L stainless risers with hard-coat insulation are designed for reliability and engine accessibility — the parts that take the most heat, built so the next service is straightforward. Water-jacketed parts are always purge welded to ensure the integrity of the welds.
Built from your sample or drawing, modeled in 3D CAD, finished to fit the run you already have.
Quote a riser →
316L · hard-coat insulated
Full systems for repowers & new builds.
New engines rarely meet old exhaust. We design and fabricate complete wet-exhaust systems matched to the new powerplant — and for repowers or new construction we travel to consult, so the exhaust is never the item holding up sea trial.
Systems and elbows, collectors, silencers and mixers — in 316L stainless, marine-grade aluminum, high-grade alloy or FRP.
Scope a repower →
Repower & new construction
Insulation, hose & wet-exhaust hardware.
Custom thermal insulation blankets that protect the engine room and crew, plus the full run of wet-exhaust hardware — blue silicone hump hose, stainless clamps, crush sleeves and sealants — stocked and shipped from Fort Lauderdale.
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Insulation & wet-exhaust hardware
Materials
Only the finest materials available.
What survives marine exhaust is the right alloy, joined correctly, inspected before it leaves the shop. Water-jacketed parts are always purge welded to ensure the integrity of the welds. We specify to the application — never down to a price.
The standard for our metal exhaust components; AL6XN available on request
Where weight matters without sacrificing durability
High-grade marine alloy for demanding service conditions
Lloyd's / ABS-approved tubing and elbows for the wet side of the system
Parts Catalog
In stock. Shipped from Fort Lauderdale.
316L Water-Cooled Riser
OEM-spec 180° water-cooled exhaust riser in 316L stainless, built to your engine.
4" Blue Silicone Hump Hose
MMX-brand marine wet-exhaust single-hump silicone hose. Full diameter range in stock.
8" SS Crush Sleeve
Stainless crush sleeve for secure wet-exhaust hose terminations.
4" HD SS T-Bolt Clamp
Heavy-duty stainless T-bolt clamp sized for marine exhaust connections.
Constant-Torque Hose Clamp
Steel constant-torque clamp that holds seal through heat cycling. 850 and 900 sizes.
Thermal Insulation Blanket
Custom removable insulation for risers, turbos and manifolds. Built to your components.
Full catalog spans exhaust systems & elbows, manufacturing components, insulation, silicone hose, clamps and FRP.
Ask for the full catalog →How We Work
Sample or drawing in. Finished system out.
A real sequence, not a slogan — the order every job runs, from first call to the exhaust running under load.
Consult
Tell us the vessel, the engines and the run. We travel for repowers and new builds.
Model
Built from your sample or drawing, engineered in 3D CAD.
Fabricate
316L, alloy, aluminum or FRP — cut, formed and welded in-house.
Inspect
In-process and final quality inspection on every order.
Fit
Delivered ready to install, or fitted on site and verified under load.
Built once. Built right.
Outlast the vessel.
Send the drawing. We'll come back with a plan, a price and a system that doesn't fail first.
Request a Quote
Tell us about the vessel — engines, run, timeline.
Send drawings or photos and we'll come back with a plan, a price and a timeline. Every enquiry is answered personally.