A twin turbo Duramax marine engine gets an extra kick from being supercharged!
It has a very long name and a foreboding look… It’s the Banks Sequential Super-Turbo Marine Diesel. This engine had been on the minds, drawing boards, computer screens, PDA’s, benches and engine stands of the Banks Power engineering, design and race shop staff for some two years. On January 15, 2010, covered in electrical lines that connect to sensors monitoring some 200+ points of information, this very special General Motors Duramax-based V-8 diesel engine fired up first on the try, went effortlessly into a nice, clean 900RPM idle, and sounded to all within earshot as though it was quite eager for the kind of extreme duty service that lied ahead for it. Combining the low speed power and transient response of supercharging with the high speed power and cruising efficiency of twin-turbocharging this new engine is aimed squarely at marine use where, as Gale Banks so aptly puts it, “You’re always going uphill.” Here’s 6.6 liters of clean-burning diesel V-8 that’ll crank out some 800 horsepower and twist up 900 pounds-feet of torque across a working rev range of 1,600 to 4,600 RPM.
The Banks R866SC V8 6.6L Supercharged Diesel is an engineering powerhouse delivering 600-650 horsepower. Featuring a 3.8L Whipple supercharger and custom FEAD, this complete package is built for extreme performance.
Banks Power by the Numbers breaks down the real data behind a record-setting 2025—from millions of video views to testing fuel burned and parts shipped worldwide.
A Canadian diesel mechanic visits Banks Power and gets a firsthand lesson from Gale Banks on air density, cold starts, and real engineering behind reliable diesel performance.
The Banks Ram-Air Transmission Pan for the 68RFE delivers industry-leading cooling and +3 quarts of added capacity—keeping your transmission alive under heavy load.
The Banks Ram-Air Differential Cover not only looks good—it runs cooler, flows smarter, and protects better than any other diff cover on the market
The Banks 7.3 Intercooler Upgrade System lets your OBS Power Stroke breathe deeper and stay cooler, keeping boost strong and power consistent even under load.
From hot-rod beginnings to world-record diesel innovation, Gale Banks earned his title as the Godfather of Turbocharging. Learn how he reshaped the performance industry.
Ford F-350 Tremor owner Braxton Schenk ditches the factory forked exhaust for a Banks Monster Exhaust—better flow, better sound, and a finished look that fits the truck.
The Banks Derringer Tuner for 2024–25 L5P Duramax is now officially California smog legal. Enjoy +86 hp, +178 lb-ft, and full 50-state emissions compliance.
The Banks Techni-Cooler Intercooler Upgrade boosts airflow, reduces temps, and pairs with the Monster-Ram to help your 5.9L Cummins pull harder and last longer.
Avoid catastrophic 6.7L Cummins engine failure with the Banks Monster-Ram Intake. It prevents grid heater bolt failure and boosts airflow for real performance gains.
The Banks Power Bundle for 2024+ L5P Duramax models is now officially California emissions compliant, combining performance and legal peace of mind.
