CUMMINS ENGINES
SMALL OR BIG CAM I, II, III, IV OR NTC/STC, L10
The Cummins Small Cam, Big Cam I/II/III/IV, NTC/STC, and L10 engines are classic Cummins diesel engines used in older Class 8 trucks, vocational trucks, buses, agricultural equipment, construction equipment, generators, and industrial applications.
- These engines are especially common in older Peterbilt, Kenworth, Freightliner, International, Ford, Mack, and vocational trucks where owners value mechanical simplicity, strong torque, rebuildability, and lower electronics/emissions complexity compared with modern engines.
- Engine Displacement
- Small Cam → 14.0 L
- Big Cam I → 14.0 L
- Big Cam II → 14.0 L
- Big Cam III → 14.0 L
- Big Cam IV → 14.0 L
- NTC/STC → 14.0 L
- L10 → 10.0 L
- A FASS System can:
- Help Cummins engines because many are still working with aged tanks, old fuel lines, mechanical PT fuel systems, injector wear, suction leaks, sediment, algae, or water contamination, and a cleaner, steadier fuel supply can help reduce hard starts, throttle hesitation, fuel starvation under load, smoke, and inconsistent fueling on engines that rely heavily on volume and restriction-free fuel delivery.
- Makes secondary filter post maintenance priming unnecessary.
ISB / ISC / ISL
The Cummins ISB, ISC, and ISL engines are electronically controlled inline-6 diesel engines used in medium-duty trucks, buses, RVs, delivery trucks, utility trucks, vocational equipment, agricultural equipment, and some industrial applications.
- These engines are often found in stop-and-go, mixed-duty, and high-idle applications where fuel quality, filter condition, tank cleanliness, and consistent supply pressure matter for drivability and injector life.
- Engine Displacement
- ISB → 5.9 L or 6.7 L
- ISC → 8.3 L
- ISL → 8.9 L
- A FASS System can:
- Help ISB, ISC, and ISL engines because many of these trucks and RVs see long idle time, seasonal storage, older fuel tanks, and varied fuel quality, while the later common-rail versions are especially sensitive to water, debris, aeration, and restriction that can lead to hard starts, injector wear, low power, rail-pressure issues, rough idle, and expensive fuel-system repairs.
- Makes secondary filter post maintenance priming unnecessary.
ISM / ISX15 / X12 / N14 CELECT PLUS
The Cummins ISM, ISX15, X12, and N14 CELECT Plus engines are heavy-duty inline-6 diesel engines used in Class 8 highway trucks, vocational trucks, heavy-haul equipment, buses, RVs, industrial applications, and some specialty equipment.
- These engines cover everything from older fleet and vocational trucks using the N14 and ISM, to long-haul and heavy-haul applications with the ISX15, to newer weight-sensitive vocational, regional, and specialty applications with the X12.
- Engine Displacement
- ISM→ 10.8 L
- ISX15 → 14.9 L
- X12 → 11.8 L
- N14 CELECT PLUS → 14.0 L
- A FASS System can:
- Help Cummins engines because the older N14/ISM platforms often suffer from age-related tank debris, suction leaks, and restriction, while the newer ISX15, X12, engines depend on clean, air-free, restriction-free fuel to protect sensitive injectors, maintain rail pressure, reduce hard starts or derates, and support consistent fueling under high-load highway or vocational duty.
- Makes secondary filter post maintenance priming unnecessary.
ISX12
The Cummins ISX12 is a heavy-duty inline-6 diesel engine used in regional-haul trucks, vocational trucks, refuse trucks, mixers, dump trucks, motorcoaches, and weight-sensitive Class 8 applications.
- It is often chosen where operators need strong torque and durability in a lighter package than a 15-liter engine, making it common in urban, vocational, regional, and stop-and-go work where idle time and fuel quality can vary.
- Engine Displacement
- ISX12 → 11.9 L
- A FASS System can:
- Help ISX12 because its modern injection system and emissions-era operating strategy depend on clean, air-free, restriction-free fuel, while vocational and regional trucks often deal with tank debris, water contamination, filter restriction, long idle time, and inconsistent fuel supply that can contribute to hard starts, rail-pressure issues, injector wear, derates, rough idle, and low power under load.
- Makes secondary filter post maintenance priming unnecessary.
SIGNATURE SERIES
The Cummins Signature Series is a heavy-duty inline-6 diesel engine family used in Class 8 highway tractors, heavy-haul trucks, vocational equipment, and premium fleet applications.
- These engines are commonly found in older Peterbilt, Kenworth, Freightliner, International, and Western Star trucks where operators wanted big power, strong pulling ability, and more electronic control than earlier mechanical Cummins engines.
- Engine Displacement
- Signature 600 → 14.9 L
- Signature ISX → 14.9 L
- A FASS System can:
- Help Cummins Signature engines because their early high-output electronic fuel system needs steady fuel volume and clean supply, while many Signature-powered trucks now have aging tanks, older fuel lines, suction-side leaks, fuel aeration, water contamination, and restriction that can contribute to hard starts, injector wear, low power under load, rough idle, and inconsistent throttle response.
- Makes secondary filter post maintenance priming unnecessary.
X15
The Cummins X15 engines are heavy-duty inline-6 diesel engines used in Class 8 highway trucks, vocational trucks, heavy-haul equipment, buses, RVs, industrial applications, and some specialty equipment.
- These engines cover everything from older fleet and vocational trucks using the X15 newer weight-sensitive vocational, regional, and specialty applications.
- Engine Displacement
- X15 → 14.9 L
- A FASS System can:
- Help Cummins engines because the newer X15, engines depend on clean, air-free, restriction-free fuel to protect sensitive injectors, maintain rail pressure, reduce hard starts or derates, and support consistent fueling under high-load highway or vocational duty.
- Makes secondary filter post maintenance priming unnecessary.
CUMMINS ENGINES
Cummins engines are widely used across pickup trucks, medium-duty trucks, buses, RVs, Class 8 highway tractors, vocational trucks, agriculture, construction, marine, generator, and industrial applications.
- Cummins is known for building mostly inline diesel engines, with popular families ranging from the B-Series 5.9L/6.7L, C/ISC 8.3L, L/ISL/L9, M/ISM, N14, Signature/ISX/X15, and newer X-Series engines.
- Older Cummins engines are often valued for mechanical simplicity, torque, rebuildability, and parts support, while newer Cummins engines are known for electronic control, high-pressure fuel systems, emissions compliance, stronger diagnostics, and improved fuel efficiency.
- A FASS System makes a strong case across Cummins platforms because many Cummins engines work in high-mileage, high-load, or stop-and-go applications where fuel restriction, water contamination, tank debris, aeration, and inconsistent supply pressure can hurt injector life, fuel pressure stability, throttle response, cold starts, power under load, and overall fuel-system reliability.
Need a FASS System for an engine that is not listed contact us below and we can discuss a solution for you.
