8 inch Mixer-Modified Spray Pattern Flexible/Isolated exhaust riser support Flexible/Isolated exhaust riser support Flexible/Isolated exhaust riser support Yanmar - 31 Bertram - Starboard Exhaust riser. Cummins QSC 490 with V-drive, port side - 4" dry to 6" mixer. Very long 4" dry riser to adapt to current 6" wet lift muffler system. Cummins QSC 490 - "Over the Top" dry riser for V-drive - 4" dry to 6" wet mixer. Cummins QSB 380 Riser to mixer to custom 5" 40 Degree elbow. Cummins QSB 380 - 4" dry to 5" mixer. Cummins QSC 490 with V-drive, starboard side - 4" dry to 6" mixer. Cummins 670 QSM with 4" dry riser and 6" wet mixer. Tight 6 inch riser design - Had to clear engine combing. Good and safe exhaust design. New Custom WET MIXERS installed on old risers, 3" dry to 5" wet. Custom Wraps Cummins QSM 670 - 4" dry to 6" mixer to custom 8" FRP elbow to existing 8" exhaust & muffler - Was under 25" H2O at WOT. Cummins 350C 4" dry riser to 6" wet mixer with support. Combo exhaust and deck supports. Vert tight Collection T - 6 inch to 8 inch to double 5 inch. Cummins QSC/QSL Turbo exhaust flange adaptation to 4" pipe weld 90's. Cummins 6BTA 370 / 31 Bertram port engine - 4" dry to 5" wet mixer to Custom 5 to 6" FRP wet 90. > Cummins QSB 380 Port Riser to mixer to custom 5" 55 Degree elbow. This picture shows how well the "High Mount Turbo" option can lend itself to a simple exhaust system in a 25 Ft Bertram V-Drive set-up. This owner only wanted the best of everything and took unbelievable pride in this repower....   Exhaust System Images - 2 Cummins QSB - 4" dry riser to 5" wet mixer to 6" factory lift muffler to 6" side outlet. Cummins 370 Diamond - 31 Bertram port engine cross over-3" to 4" dry to 5" mixer. Yanmar 6LYA370 dry riser - 4" dry to 5" mixer to 6" stern exhaust-V-Drive application. Detroit Series 60 - 6" dry riser to 8" wet mixer to 10" FRP tube collector to twin 6" outlets to stern - Right side of pics show 100% dry aux exhaust thru side of vessel - 90 Ft Aluminum converted crew boat. Cummins QSL 400 dry riser - 4" dry to 6" wet mixer. Detroit Series 60 dry riser - 6" dry to 8" wet - Notice flexible hanger above wet mixer-SS 6" dry flex / "bellows" under wrap on riser. Cummins N-14 Dry turbo connection - 5" dry to 8" dry muffler and stack. Cummins 6CTA 430 dry riser - 4" dry to 6" mixer. Simple Cummins QSM - 4" dry riser to 6" mixer to 8" wet FRP mufflers. External stern exits - 5" into custom 6" stern port corner outlets. Custom lift muffler for 20Kw aux and 8" under water exit for Cummins QSM 635. Simple riser for Cummins QSC 540 - 4" dry to 6" wet. 5 to 6 inch Surge tube connection QSB riser pointed to the "right spot" eliminating and hard wet bends. Difficult design with long dry riser for Cummins 6CTA on commercial vessel - 4" dry to 6" wet to existing 8" outlets - Has dry "flex" in riser and flexible hanger attached to "cold mixer". Yanmar 6LPA custom exhaust riser - Notice pyro probe lacation. 100% dry exhaust to side outlet - Aluminum boat. Doomed to failure Doomed to failure 480CE with bad riser design, This is doomed to fail Using Factory elbows - Budget sometimes prevails & goes against my wishes. Cummins 6BTA 315 - 4" dry riser to 5" mixer to 6" "surge tube". Detroit Series 60 - 6" dry riser to custom 8" wet mixer on 85 Ft commercial boat-4B 37Kw Aux in background with 3" dry riser to 4" wet lift muffler.   Exhaust System Images - 3 Earlier style heat wrap design using wire to fit / secure the wrap to dry riser - We prefer the more expensive "SS spring" design. Un-finished 6" dry riser. Deep hulled sail boat - Tall dry risers for both the Cummins 4B main and 2 Kw Yanmar auxiliary. The tops of both engines are about 12" below the waterline. Cummins 6CTA 8.3 with 4" dry to 6" mixer. Cummins 6BTA 370-Starboard riser in 35Ft Bertram - 4" dry to 6" mixer. 6" simple 95 degree "wet elbow". Cummins 370 Diamond-Starboard-3" dry to 5" mixer - 36Ft Hatteras. This style dry riser shows the ultimate in safety-100% "over the top" water injection on the down hill side. Cummins QSM 580 with 4" dry riser to 6" mixer to custom lift muffler w/ 8" side outlet. Properly designed flush side exit.

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