Metcalf Marine ExhaustCustom Fabrication
Built from your drawing. Welded to outlast the vessel.
Complete exhaust systems and the components that fail first — engineered to the vessel instead of pulled from a shelf. Every water-jacketed part is purge welded, in 316L stainless or AL6XN, inspected before it leaves the shop.
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).
In the Shop
Cut, formed and welded in-house.
Fort Lauderdale fabrication, start to finish — nothing subbed out, nothing pulled off a shelf and hoped to fit.
What We Build
The systems yachts actually depend on.
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.
316L stainless risers with hard-coat insulation, designed for reliability and engine accessibility — the parts that take the most heat, built so the next service is straightforward.
Built from your sample or drawing, modeled in 3D CAD, finished to fit the run you already have.
Quote a riser →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 travel to consult for repowers and new construction.
Scope a repower →Insulation, hose & wet-exhaust hardware.
Custom thermal insulation blankets, plus the full run of wet-exhaust hardware — silicone hump hose, stainless clamps, crush sleeves and sealants — stocked and shipped from Fort Lauderdale.
Browse the catalog →Materials
Only the finest materials available.
What survives marine exhaust is the right alloy, joined correctly, inspected before it leaves the shop. We specify to the application — never down to a price.
316L Stainless Steel
The standard for our metal exhaust components; AL6XN available on request.
Marine-Grade Aluminum
Where weight matters without sacrificing durability.
Coppernickel
High-grade marine alloy for demanding service conditions.
Fiberglass & FRP
Lloyd's / ABS-approved tubing and elbows for the wet side of the system.
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.
MMX — Family Owned, Fort Lauderdale
More than 30 years fabricating exhaust for yachts that can't afford a second failure.
ABS approved. Lloyd's approved. USCG compliant. Every order gets in-process and final quality inspection before it leaves the shop.
Request a Quote
Send the drawing. We'll come back with a plan.
A real quote, priced to your vessel and enginesTell 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.
Talk to MMX
Custom Fabrication