• 🚚 FREE SHIPPING & NO upfront core — use promo code FS-102 at checkout
  • Serving the public and commercial auto shops nationwide
  • 🛒 Order online anytime — open 24/7
  • 📞 Phone support Mon–Fri 8 AM–5 PM EST · 800-731-3177
  • ⭐ 4.8-star rated · 9,000+ Google reviews
  • 🛡️ Up to 5-year / unlimited-mile warranty
  • America’s trusted powertrain leader since 1961
Remanufactured Powertrain Components Online Ordering Open 24/7 Phone Support Mon–Fri 8AM–5PM EST 800-731-3177 sales@fraserengines.com Public & Commercial Shops Welcome
Online ordering open 24/7 · Phone support Mon–Fri 8AM–5PM EST
sales@fraserengines.com · Public & commercial shops welcome

FRASER ENGINES - 5.9L 24V ISB CUMMINS DIESEL ENGINES

5.9L CUMMINS 24V ISB ENGINES

Long Block Configuration
Complete internal engine assembly built to OEM or better specifications
Includes:
  • Engine Block
  • Crankshaft
  • Crank Gear
  • Piston Assemblies
  • Connecting Rods
  • Cylinder Head
  • Camshaft
  • Cam Gear
  • Valve Train (Lifters, Pushrods & Rocker Arms)
  • Oil Pump
  • Oil Cooler
  • Oil Filter Assembly
  • Front Gear Housing
  • Rear Covers & Seal
  • Side Cover / Crankcase Breather
  • Water Pump
  • Valve Cover(s)
  • Complete Gasket Set
Complete Drop-In Configuration
Turn-key engine solution for fast installation and minimal downtime
Includes Everything in the Long Block PLUS:
  • Lift Pump
  • Low & High Pressure Fuel Lines
  • Fuel Filter Assembly
  • Injection Pump
  • Injectors
  • Turbocharger
  • Intake Cover & Connections
  • Thermostat Housing
  • Thermostat
  • Oil Pickup Tube
  • Sensors & Switches
  • Damper Pulley
  • Exhaust Manifold
  • Oil Pan
  • Gear Cover & Seal

5.9L CUMMINS 24V ISB ENGINES

The 5.9L QSB/ISB Cummins platform is widely used across a broad range of demanding applications including walk-in vans, buses, yard tractors, and conventional cab trucks. Fraser Engines also supports QSB configurations for construction, agricultural, and industrial equipment—delivering dependable performance across every environment.

At Fraser Engines, every 5.9L Cummins engine is remanufactured using precision machining processes designed to exceed OEM standards. Our blocks are carefully machined, honed, and aligned to ensure optimal cylinder geometry, reduced break-in time, and improved long-term engine efficiency.

We incorporate OEM or equivalent premium components throughout the build—including pistons, rings, bearings, valves, and gasket systems—to ensure durability under heavy load and extended service life. Each engine is engineered to correct known wear points and deliver consistent, reliable performance in both commercial and industrial applications.

Every Fraser Engine is assembled with strict quality control standards, delivering a zero-mile engine built for longevity, reliability, and real-world performance where it matters most.

To Place an Order
Please have the following ready before requesting price & availability:
  • Vehicle VIN Number OR Machine Serial Number
FRASER Advantage™ Precision Manufacturing & Testing

Every Fraser Engine is built using advanced machining equipment and strict quality-controlled assembly processes. Our remanufacturing procedures follow proven, repeatable methods designed to ensure consistent tolerances, proper clearances, and long-term engine durability.

Each engine is manufactured with a focus on correcting common failure points while maintaining OEM fitment and performance standards. Components are carefully inspected, machined, and assembled to deliver a zero-mile engine that performs reliably in real-world conditions.

Comprehensive Testing Process:
  • Precision-machined and quality-checked components
  • Controlled assembly processes for consistent build integrity
  • Functional verification procedures prior to shipment
  • Engines are validated under simulated operating conditions where applicable
  • Leak detection and system integrity checks performed before release

Fraser Engines ensures every unit meets strict internal standards before leaving our facility—delivering dependable performance, reduced installation risk, and long-term reliability.

Warranty Coverage
  • On-Road Complete Drop-In Configurations: 2-Year / Unlimited Miles (2nd year long block coverage)
  • Long Block Configurations: 1-Year / Unlimited Miles
  • Off-Road Applications: 1-Year / 2,000 Hours
  • Motorhome / RV Applications: 1-Year Parts & Labor Only
Note: Some restrictions apply. Please refer to the full limited warranty details or contact our team for complete coverage information.
Entry-Level Long Block – 325HP
FRHM518-DLX • CPL: 1091, 8344, 8346
$8,161.00
Core: $1,700 Refundable
Shipping: Please call
  • OEM spec build
  • Updated components
  • Stock replacement ready
📞 Contact Sales 800-731-3177
Long Block w/ Head Studs
FRHMP7-PRO • 325HP
$8,861.00
Core: $1,700 Refundable
Shipping: Please call
  • Head studs upgrade
  • Better sealing
  • Great for towing
📞 Contact Sales 800-731-3177
Common Rail Drop-In
FRHM498-CRD • ISB02
$16,673.00
Core: $2,800 Refundable
Shipping: Please call
  • Plug & play
  • Fully assembled
  • Minimal downtime
📞 Contact Sales 800-731-3177
Drop-In – Plain Valve Cover
FRHM516-STD • ISB02
$16,790.00
Core: $2,800 Refundable
Shipping: Please call
  • Complete unit
  • Cost efficient
  • Reliable build
📞 Contact Sales 800-731-3177
Drop-In – Integrated Cover
FRHM517-INT • ISB02
$16,790.00
Core: $2,800 Refundable
Shipping: Please call
  • Cleaner install
  • Better sealing
  • Durability focused
📞 Contact Sales 800-731-3177
325HP Drop-In SB02
FRHM519-HP
$16,790.00
Core: $2,800 Refundable
Shipping: Please call
  • Factory performance
  • Balanced build
  • Long-term reliability
📞 Contact Sales 800-731-3177
Manual Drop-In Option
FRHM520-MAN
$16,790.00
Core: $2,800 Refundable
Shipping: Please call
  • Manual trans setup
  • Direct fit
  • No mods needed
📞 Contact Sales 800-731-3177
Premium Drop-In + Wiring + Studs
FRHMP5-ULT
$17,489.00
Core: $2,800 Refundable
Shipping: Please call
  • Turn-key solution
  • Head studs included
  • Fleet-ready durability
📞 Contact Sales 800-731-3177
High-Performance w/ Lift Pump
FRHMP6-FUEL
$17,489.00
Core: $2,800 Refundable
Shipping: Please call
  • Upgraded fuel system
  • Performance optimized
  • Heavy-duty applications
📞 Contact Sales 800-731-3177