DFC Diesel SS5904507STSOALB Street Series Standard Speed Of Air Long Block | 2004.5-2007 Dodge RAM 5.9L Cummins

Features:

• 5-Year / 100,000 Mile Warranty Coverage
• Built For Manual Transmission Cummins Trucks
• Includes Cylinder Head And Gasket Kit
• Remanufactured With All New Internal Components
• Professionally Machined Using Rottler CNC Equipment
• Gapless Total Seal Rings Improve Compression
• Cometic MLS Head Gasket Standard On All Builds
• Preset Rockers And Pushrods Save Install Time
• Improved Sealing In Known Leak-Prone Areas
• Designed For Daily Drivers And Work Use
• Enhanced Piston Cooling Prevents Heat Failures
• Includes Oversized Pistons For Stronger Fitment

This Is The Engine Your Manual Truck Deserves

If your 2004.5-2007 Dodge Cummins with a manual transmission is starting to feel worn out, this Street Series Long Block is the upgrade you’ve been waiting for. Built by DFC Diesel to outperform a factory replacement, this engine is a solid choice for daily drivers, work trucks, and anyone who expects more from their build. It’s not just rebuilt, it’s reengineered using premium name-brand parts that correct the common weak points of the original 5.9L Cummins platform. You get a remanufactured long block that includes everything from a rebuilt cylinder head to a full top-end gasket kit, with rockers and pushrods pre-set to factory spec to make installation smoother. And it’s backed by a 5-year, 100,000-mile warranty, so you know you’re getting something that’s meant to last. Whether you're hauling heavy loads or just need peace of mind on the open road, this engine delivers dependable power and long-term confidence. It’s the kind of investment that pays for itself in reliability and performance.

Precision Workmanship That Brings Old Power Back To Life

DFC’s Street Series Standard Long Block is assembled with a focus on clean tolerances, heat management, and long-term performance. Every unit starts with a professionally machined block using advanced Rottler CNC equipment, then bored to accept oversized pistons for a tighter, more efficient seal. The internals include new pistons, rings, bearings, valves, springs, and gaskets, all meeting or exceeding OEM standards. The cylinder head is completely remanufactured, magnafluxed, resurfaced, and rebuilt with new guides, seats, and stem seals to ensure consistent performance under load. Total Seal gapless piston rings improve compression and reduce blow-by, while improved piston cooling helps protect against failures caused by faulty injectors. Factory-spec pushrods and rockers come preset for easy install, saving you time and guesswork in the shop. Combined with enhanced sealing in areas known for leaks, this long block delivers a stronger, more durable foundation for any manual-transmission Cummins truck.

Fits: 2004.5, 2005, 2006, 2007 Dodge RAM 5.9L Cummins

Notes:

• This is a long block, not a complete engine.
• Designed specifically for manual transmission applications.
• Customer must reuse or replace external components like turbo, injectors, and accessories.
• Remanufactured with all new or OEM-equivalent internal parts.
• Block is bored for use with oversized pistons.
• Includes a remanufactured, fully rebuilt cylinder head.
• Top-end gasket kit is included for installation convenience.
• All machining performed using advanced Rottler CNC equipment.
• Core return is required and must pass inspection.
• Street Series is ideal for daily driving and light-duty work.
• Warranty coverage is 5 years or 160,000 km (100,000 miles).
• Professional installation is recommended for optimal results.

Street Series vs Tow/Haul vs Tow/Haul HD

• Street Series: Ideal for daily driving, light work, and diesel enthusiasts. Focuses on reliability upgrades over stock, with head stud and sealing improvements.

• Tow/Haul Series: All Street upgrades plus added performance parts for higher load and towing power. Supports builds up to ~700 HP.

• Tow/Haul HD Series: The most robust option. Adds heavy-duty internals like Wagler rods and a balanced rotating assembly for 800+ HP capability.

Standard/Auto vs Standard vs Auto

• Standard/Auto: Compatible with both manual and automatic transmissions. Offers the most flexibility.

• Standard: Built specifically for manual transmission configurations.

• Auto: Built specifically for automatic transmission setups.